Typically, resistors are denoted by symbols like R, RN, RF, and FS or by rectangular forms with two parallel lines on either side that are commonly oriented vertically.
The resistor, a component used in electrical circuits to restrict the flow of current, is represented by the symbol of the physical form of a resistor.
The two parallel lines stand in for the resistor's two terminals, which are the locations where it is linked to the circuit. Typically, a color code or a number value written on the resistor's body will show the value of the resistor.
From simple electronic toys to sophisticated computer systems, resistors are a common component of electronic devices and are crucial for controlling flow.
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a group of atoms that has all like poles pointing in the same direction, the definition of?
A group of atoms with like poles pointing in the same direction is referred to as a magnetic field or simply a magnetic.
What is magnetic field?A magnetic field is a field that is created by a magnet or a moving electric charge. The field exerts a force on other magnets or moving electric charges, and is described mathematically as a vector field. In a magnetic field, all of the like poles (north or south) will be pointing in the same direction, producing a net magnetic force. This force can be used to do work, such as generating electricity or producing mechanical motion.
Magnetic fields are an important part of our everyday lives and play a crucial role in many technologies, such as electric motors, generators, and MRI machines. They are also a fundamental aspect of the universe, as they are produced by the motion of electrically charged particles in stars and other celestial objects.
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In which direction will a negatively charged particle experience a force in an electric field?
A.
in the same direction as the electric field
B.
in the opposite direction as the electric field
C.
at right angles to the electric field
D.
always downward
Answer:
D always downward because it is negative
When a boxer moves into an oncoming punch, the force experienced is
A) no different, but the timing is different
B) decreased
C) increased
D) all of the above
When a boxer moves into an oncoming punch, the force experienced is (C) increased
The reason that moving into an oncoming punch increases the force experienced is due to the principles of momentum and force. When two objects collide, the total momentum of the system is conserved,
A boxer moving into an oncoming punch, the force experienced is increased. This is because the force of the punch is added to the force of the boxer's movement. When the boxer moves into the punch, the relative speed between the punch and the boxer is increased, which increases the momentum and thus the force of the impact.
In addition, moving into the punch can also reduce the distance over which the punch is applied, which further increases the force experienced.
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The fact that we always see the same face of the Moon tells us that the Moon (a) does not rotate. (b) rotates with the same period that it orbits Earth. (c) looks the same on both sides.
The correct option is B, The fact that we always see the same face of the Moon tells us that the Moon rotates with the same period that it orbits Earth.
The Moon rotates on its own axis in a process known as rotation. Like most celestial bodies, the Moon rotates in a counterclockwise direction when viewed from above its north pole. This means that as the Moon orbits the Earth, the same side of the Moon always faces us. This phenomenon is known as synchronous rotation, and it occurs because the Moon's rotation period is almost exactly the same as its orbital period around the Earth.
The Moon's rotation is not a perfect sphere, however, and it has a slight bulge at the equator. This is due to the gravitational pull of the Earth, which has caused the Moon to become slightly deformed over time. The Moon's axial tilt is also very small, which means that its poles are nearly perpendicular to its orbital plane.
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What does the word Core mean?
a. The Sun's center
b. The layer of the Sun's atmosphere that looks like a halo during an eclipse.
c. The layer of the Sun's atmosphere that has a reddish glow.
d. Reddish loops of gas that link parts of sunspot regions.
The word Core means: The sun's center.
What is the core?Depending on the context, the word "core" can indicate many different things, but when it comes to the Sun, it typically refers to option the Sun's center. The nuclear fusion reactions that take place in the Sun's core are where the energy for the star is produced. The core of the sun is the area where nuclear fusion processes occur, producing a huge quantity of heat and energy. The sun's core has the highest temperature, up to a whopping 27 million degrees Fahrenheit. Since the sun's energy is produced in the core and radiates outward to its surface and beyond, the core is known as the sun.
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What is the light source for terrestrial telescope?
A terrestrial telescope is a refracting telescope used to view distant earthly objects. The light source is the light falling from a distant object.
A terrestrial telescope is used to view enlarged, erect images of distant objects on the earth surface. There are three lenses in a terrestrial telescope. Objective lens, eye lens and erecting lens.
The working principle is refraction. The three convex lenses converge the rays to produce an image. The light from a distant object fall on the telescope. The incident rays falling on the objective lens is refracted and the intermediate image is formed. This image falls on the erecting lens and another intermediate image is formed.
The image from the erecting lens will act as the object for the eye lens. As light passes through the eye lens, an enlarged erect image is formed.
So the light source is the light from the distant object.
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Imagine a planet moving in a perfectly circular orbit around the Sun, such that its distance from the Sun never changes. What does Kepler's Second Law say about this planet's orbital speed? Given that, is this planet experiencing an acceleration? In selecting your answer below, be sure to choose the correct response (Yes or No) AND the correct reason for that response.
Choose one:
A. Yes. Although Kepler's Second Law demands that a planet in a perfectly circular orbit has a constant orbital speed, the planet is still traveling in a curved path and so it is changing its direction of motion all the time. Changes in direction require accelerations. just like changes in speed do.B. No. Kepler's Second Law demands that this planet has a constant orbital speed, and if the speed is not changing, then there can be no acceleration present.C. No. Planets orbit in the vacuum of space and so do not experience forces non accelerations.D. Yes. Kepler's Second Law demands that this planet is always changing its orbital speed (going faster at some times, slower at others), and change in speed requires an acceleration.
A. Yes. Although a planet in a perfectly circular orbit must have a constant orbital speed according to Kepler's Second Law, the planet is still moving over a curved path, which causes it to constantly change its direction of motion. Much like with speed changes, direction changes call for accelerations.
How does Kepler's first law explain something?The Sun is one of the orbital foci, according to Kepler's first law, and all the planets have elliptical orbits around it.
What is Kepler's second law used to explain?The planets' motion through space changes at a constant rate, according to Kepler's second law. Planets accelerate as they approach the Sun, according to the second law.
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Interference pattern? An electron beam is aimed at two closely spaced slits. The beam is attenuated to produce only one electron per minute.
Yes or No
"An electron beam is aimed at two closely spaced slits. The beam is attenuated to produce only one electron per minute is known as interference pattern." The answer is yes.
When an electron beam is aimed at two closely spaced slits, the electrons passing through the slits will interfere with each other, producing an interference pattern on a screen behind the slits. The interference pattern will be a series of bright and dark bands, where the bright bands correspond to constructive interference and the dark bands correspond to destructive interference.
When a beam of electrons is passed through two closely spaced slits, it creates an interference pattern on a screen behind the slits. This pattern results from the wave-like behaviour of electrons and the interference between the electrons passing through the two slits. The pattern appears as a series of bright and dark bands, where the position and intensity of the bands are determined by the relative phase of the electrons.
The interference pattern only becomes noticeable with a large number of electrons passing through the slits at the same time. If only one electron is passing through the slits per minute, the pattern will not be easily observable.
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A 747 jetliner lands and begins to slow to a stop as it moves along the runway. How If its mass is 3.57?
So the speed 7.5 seconds later is 17.97m/s.
m = mass of the jetliner = 3.57 x 10⁵ kg
The initial speed of the jet is v1=27 m/s
Net Braking force=– 4.30 × 10⁵ N
To find v2
v2=Ft/m +v1
v2=( –4.30 × 10⁵ NN ×7.5 s/ 3.57 x 10⁵ kg) + 27m/s
v2=17.97 m/s
Definition of MassMass was first discovered by Sir Isaac Newton through research on gravity and the inertial properties of objects he developed. Newton was an English physicist, mathematician, chemist, astronomer, natural philosopher, and theologian.
Mass can be interpreted as a measure of the number of particles contained in a substance or object. Mass is also one of the principal quantities that shows the size of the inertia of an object. Mass becomes an intrinsic property of an object, so that wherever the object is, the mass value will remain the same. If it is based on the effect of the object on the direction of motion, mass is classified as a scalar quantity (only has value).
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what would happen if the earth stopped spinning for 1 second
Answer:
It would be as if everything on the surface were suddenly given a speed of over 1000 mph.
V = S / t
V = 25000 mi (1 rotation of earth) / 24 hours in one day)
V > 1000 mph speed of objects on surface due to rotation
what is a colloid osmotic pressure
Colloid osmotic pressure is the oncotic pressure which is opposite to the hydrostatic blood pressure.
What is the colloid osmotic pressure?Oncotic pressure is the colloid osmotic-pressure. It is a form of osmotic pressure which is induced by the proteins, notably the albumin protein, in a blood vessel's plasma which causes a pull on the fluid back into the capillaries in the body. Participating colloids displace the water molecules, thus creating a relative water molecule deficit with the water molecules moving back into the circulatory system in the body within the lower venous pressure end of capillaries.
Colloid osmotic-pressure has the opposing effect of both the hydrostatic blood pressure pushing water molecules and the small molecules which are out of the blood into interstitial spaces within the arterial end of the capillaries and interstitial colloidal osmotic pressure. These interacting factors can determine the partition balancing of extracellular water between the blood plasma and outside the blood stream.
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The total sound power, in decibels, from x objects each producing 50 decibels of sound power is given by the function f(x) = 50 + 10 log x. Suppose each of the x objects increases its sound power by 10 decibels, so that the new total sound power, in decibels, is given by the function g(x) = f(x) + 10.
The new total sound power, in decibels, when each of the x objects increases its sound power by 10 decibels, is given by the function g(x) =
60 + 10 log x.
The original function is given as:
f(x) = 50 + 10 log x
When each of the x objects increases its sound power by 10 decibels, the new total sound power can be calculated as:
g(x) = f(x) + 10
= 50 + 10 log x + 10 (adding 10 to account for the increase in sound power of each object)
= 60 + 10 log x
Thus, the new function g(x) is given g(x) = f(x) + 10 which represents the total sound power in decibels produced by x objects each having a sound power of 60 decibels (50 decibels + 10 decibels increase). This function uses the logarithmic scale to calculate the total sound power, where each 10-fold increase in the number of objects corresponds to a 10-decibel increase in the total sound power.
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the dependence of the rate constant on temperature is expressed by which equation?
a. The arrhenius equation
b. The de broglie equation
c. The vanât hoff equation
d. Temperature has no effect on the rate constant
a. The Arrhenius equation
What is Arrhenius equation?
The Arrhenius equation is a mathematical expression that describes the relationship between the rate constant of a chemical reaction and temperature. The equation states that the rate constant of a reaction is proportional to the frequency factor (A), which is related to the activation energy (Ea) and the absolute temperature (T) according to the following formula:
k = Ae^(-Ea/RT)
where:
k is the rate constant,
A is the frequency factor,
Ea is the activation energy,
R is the gas constant, and
T is the absolute temperature.
The Arrhenius equation is a useful tool for predicting the effect of temperature on the rate of a chemical reaction. By measuring the rate constant at different temperatures, it is possible to determine the activation energy of the reaction, which provides important information about the mechanism of the reaction. The Arrhenius equation is widely used in the fields of chemistry, biology, and material science to study the kinetics of reactions and to design and optimize processes that involve chemical reactions.
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The correct answer is a. The Arrhenius equation. The dependence of the rate constant on temperature is expressed by the arrhenius equation.
What is Arrhenius equation?The Arrhenius equation is a mathematical expression that describes the relationship between the rate constant of a chemical reaction and temperature. The equation states that the rate constant of a reaction is proportional to the frequency factor (A), which is related to the activation energy (Ea) and the absolute temperature (T) according to the following formula:
[tex]k = Ae^(-Ea/RT)[/tex]
where:
k is the rate constant,
A is the frequency factor,
Ea is the activation energy,
R is the gas constant, and
T is the absolute temperature.
The Arrhenius equation is a useful tool for predicting the effect of temperature on the rate of a chemical reaction. By measuring the rate constant at different temperatures, it is possible to determine the activation energy of the reaction, which provides important information about the mechanism of the reaction. The Arrhenius equation is widely used in the fields of chemistry, biology, and material science to study the kinetics of reactions and to design and optimize processes that involve chemical reactions.
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1.is 15 second a scalar quantity or a vector quantity?why?
2.is 7 newton a scalar quantity or a vector quantity?why?
Answer:
Physics is a mathematical science. The underlying concepts and principles have a mathematical basis. Throughout the course of our study of physics, we will encounter a variety of concepts that have a mathematical basis associated with them. While our emphasis will often be upon the conceptual nature of physics, we will give considerable and persistent attention to its mathematical aspect.
The motion of objects can be described by words. Even a person without a background in physics has a collection of words that can be used to describe moving objects. Words and phrases such as going fast, stopped, slowing down, speeding up, and turning provide a sufficient vocabulary for describing the motion of objects. In physics, we use these words and many more. We will be expanding upon this vocabulary list with words such as distance, displacement, speed, velocity, and acceleration. As we will soon see, these words are associated with mathematical quantities that have strict definitions. The mathematical quantities that are used to describe the motion of objects can be divided into two categories. The quantity is either a vector or a scalar. These two categories can be distinguished from one another by their distinct definitions:
Scalars are quantities that are fully described by a magnitude (or numerical value) alone.
Vectors are quantities that are fully described by both a magnitude and a direction.
The remainder of this lesson will focus on several examples of vector and scalar quantities (distance, displacement, speed, velocity, and acceleration). As you proceed through the lesson, give careful attention to the vector and scalar nature of each quantity. As we proceed through other units at The Physics Classroom Tutorial and become introduced to new mathematical quantities, the discussion will often begin by identifying the new quantity as being either a vector or a scalar.
Explanation:
How deep underwater should you dive to quadruple the atmospheric pressure at the surface? note: 1 m = 3. 28 ft.
The depth of underwater to dive to quadruple the atmospheric pressure at the surface is 30 meters.
For every additional 10 meters deeper one dives, there is increase in pressure on your body by 1 bar. Our bodies are subject to 3 atmospheres or bars of pressure at a depth of 20 meters and 4 bar/atm at 30m.
At sea level, the pressure of the air that surrounds us is equal to 1 bar, which is every so often referred to as 1 atmosphere. If one dive to just 10 meters deep and that pressure is doubled – because water is much denser than air, it applies a much greater compressive force on your body.
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Suppose that two objects exert a gravitational force of 22 n on one another. What would that force be if the mass of one of the objects were doubled?.
The force of magnitude 22N will also be double to a magnitude of 44N when the mass of one of the bodies is doubled.
The gravitational force of any two bodies is given by,
F = GMm/R²
Where,
M and m are the masses of the bodies,
R is the distance between them and G is the universal gravitational constant.
Currently the force of gravitation between two bodies is given to be 22N.
Now, if one of the mass is doubled, let say M = 2M, so the new force will be,
F' = G(2M)m/R²
F' = 2GMm/R²
Putting F = GMm/R²,
F' = 2F
So, the force of gravitation between the two bodies will be doubled. So, the new force will be 44N.
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Which best explains how the coating works?
O The coating absorbs light that shines on it and
prevents the light from reflecting.
O The surface of the coating is rough, so light that
shines on it gets scattered in many directions.
O The coating bends light that passes through it and
prevents the light from reaching the user's eyes.
O The surface of the coating allows light from the room
to pass through but blocks the light from the screen.
The coating bends light that passes through it and
prevents the light from reaching the user's eyes. The correct answer is option three.
What is coating?This refers to a layer or film spread over a surface for protection or decoration. Coatings are specified as organic or inorganic according to the nature of their binder. Organic coatings are those that have an organic binder. Inorganic coatings are those that have an inorganic binder such as a silicate.
There are basically three types of coating name:
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The capacitance of a capacitor does not depend onA.the separation between the platesB.the size of the platesC.the charges on the platesD.none of the above
The capacitance of a capacitor depends on the area of the plates, the distance between the plates, and the permittivity of the dielectric material and the correct option is (D)
The capacitance of a capacitor depends on the area of the plates, the distance between the plates, and the permittivity of the dielectric material between them.
It is clear that capacitance is directly proportional to the area of the plates and the permittivity of the dielectric material, and inversely proportional to the distance between the plates.
Now, let's come back to the question, which asks about the factor that does not affect the capacitance of a capacitor. The options given are the separation between the plates, the size of the plates, the charges on the plates, and none of the above.
The correct answer is option D, i.e., none of the above.
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Which power of a telescope might be expressed as "0.5 seconds of arc"?
A. resolving power.
B. the prism.
C. poor resolving power
D. magnifying power.
Answer:
A) resolving power would be most appropriate
1 deg = 1/360 of circle
1 min = 1 deg / 60
.5 sec = 1/120 min
P(ower) = 1 deg / (60 * 120) = 1.4E-4 deg
Resolving power = .00014 deg
Objects separated by .00014 deg
In radians 1 deg = 360 / (2 * π) = 57.3 deg / rad
.00014 deg * 1 rad / 57.3 deg = 2.4E-6 rad
S = R θ separation where R is radius and θ in radians
If we let R = 250,000 distance to moon then
S = 250,000 * 2.4E-6 = .6 mi
.5 sec of arc could resolve objects .6 mi apart on moon
A particle moves horizontally in uniform circular motion, over a horizontal xy plane. At one instant, it moves through the point at coordinates (4.00 m, 4.00 m) with a velocity of 5.00 m/s2 and an acceleration of +12.5 m/s2.What are the (a) x and (b) y coordinates of the center of the circular path?
Answer:
When traveling in circular motion with constant speed,
the instantaneous acceleration vector necessarily points toward the center.
Thus, the center is “straight up” from the cited point.
(a) Since the center is “straight up” from (4.00 m, 4.00 m),
the x coordinate of the center is 4.00m.
(b) To find out “how far up” we need to know the radius. Using a=
r
v
2
we find
r=
a
v
2
=
12.5m/s
2
(5.00m/s)
2
=2.00m.
A protein molecule in an electrophoresis gel has a negative charge. The exact charge depends on the pH of the solution, but 30 excess electrons is typical.
What is the magnitude of the electric force on a protein with this charge in a 1700 N/C electric field?
F = __________N
The magnitude of the electric force is 8.16 x 10⁻¹⁵ N
We solve by the formula:
q = 1.6 x 10⁻¹⁹ x 30
Solving gives:
F=Eq= 1,700 x 1.6 x 10⁻¹⁹C x 30
= 8.16 x 10⁻¹⁵ N
Definition of Electric ForceThere are two types of forces, namely touching forces and non-touching forces. These two types of forces are divided according to the presence or absence of contact.
Touch force is a force that arises as a result of direct contact or physical contact with objects. In this type of force, the force cannot exist if the objects do not touch each other. Examples of this touch force are frictional force, muscle force and spring force.
The non-contact force is the force that arises due to the presence of a field around the object that is the source of the force with the surrounding objects. Even though the objects do not touch each other, the objects around the source of the force will feel the effect, for example the electric force, the magnetic force and the gravitational force.
Based on the explanation above, it can be concluded that the electric force is a force that is generated or generated by various objects that have an electric charge. Electric force can also be interpreted as a force generated by objects that have an electric charge in an electric field.
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why do we never see the moon next to, say, polaris?
We never see the Moon next to Polaris (the North Star) because the Moon's orbit around the Earth is not aligned with the Earth's rotation axis. Instead, the Moon's orbit is inclined at an angle of about 5 degrees to the Earth's orbit around the Sun.
This means that the Moon appears to move across the sky along a path that is inclined at a similar angle to the Earth's equator. Polaris, on the other hand, appears to remain in a fixed position relative to the Earth's rotation axis. As a result, the Moon and Polaris appear to move along different paths in the sky and are unlikely to be seen next to each other.
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Since all E.M. Radiation travels at the same speed, waves with
longer wavelengths have _________ frequencies
Answer:
Explanation:
The speed of a wave is a product of its wavelength and frequency
Wavelength is inversely proportional to frequency
Longer wavelength electromagnetic waves have lower frequencies, and shorter wavelength waves have higher frequencies.
The answer is shorter
a parallel-plate capacitor of capacitance c has plate area a and distance between plates d. the capacitor is connected to a battery with voltage v, fully charged and then disconnected. a slab of dielectric material with dielectric constant 4.0 is then inserted into capacitor, completely filling region between plates.
25% Part (a) After inserting the dielectric, the capacitance is now: 25% Part (b) After inserting the dielectric, the voltage across the capacitor is now: A 25% Part (c) After inserting the dielectric, the charged stored in the capacitor is now: 25% Part (d) After inserting the dielectric, the electric field in the capacitor is now:
The new electric field in the capacitor is E = V/d = (Q/A)d/εoεr/d = (Q/Aεoεr).
An electric field is a physical preach and it by the electric charges that extra a force and other charges extracting or appealing them electric conducted by electric charges with a statinary or moving the electric field is a vector field meaning that it is both electric and direction strength of electric field is measured in moles per meter electric field and used in a variety of application from our generation to medical treatment.
Part (a) After inserting the dielectric, the capacitance is now:
The capacitance of a parallel-plate capacitor can be calculated using the equation C = εoεrA/d, where εo is the permittivity of free space, εr is the relative permittivity of the medium between the plates, A is the area of the plates, and d is the distance between the plates. Since the dielectric medium has a relative permittivity of 4.0, the new capacitance of the capacitor is C = εoεrA/d = εo(4.0)(a)/d.
Part (b) After inserting the dielectric, the voltage across the capacitor is now:
The voltage across a capacitor is related to the amount of charge stored on it, which is proportional to the capacitance. Since the capacitance has increased, the voltage across the capacitor has also increased. The new voltage across the capacitor is V = Q/C = Q/(εoεrA/d) = (Q/A)d/εoεr, where Q is the charge stored in the capacitor.
Part (c) After inserting the dielectric, the charge stored in the capacitor is now:
The charge stored in a capacitor is related to the capacitance, so the charge stored in the capacitor has increased due to the increase in capacitance. The new charge stored in the capacitor is Q = Cv = (εoεrA/d)v = (A/d)vεoεr, where v is the voltage across the capacitor.
Part (d) After inserting the dielectric, the electric field in the capacitor is now:
The electric field in a capacitor is related to the voltage across the capacitor and the distance between the plates. Since the voltage across the capacitor has increased and the distance between the plates has not changed, the electric field has increased. The new electric field in the capacitor is E = V/d = (Q/A)d/εoεr/d = (Q/Aεoεr).
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An elevator suspended by a cable is descending at constant velocity. Name these forces
This is the downward-pulling force of gravity acting on the mass of the elevator. This is the force the elevator experiences from the cable, which balances out the gravitational pull and supports the elevator's weight.
What is gravitational force?The force of attraction between two mass-containing objects is known as gravitational force. The gravitational pull between two objects is inversely proportional to their squared distances and inversely proportional to their masses.
Isaac Newton's law of universal gravitation, which asserts that the equation determines the force of gravity between two objects, describes this.
[tex]F = G \times (m1 \times m2) / r^2[/tex]
where F is the force of gravity, G is the gravitational constant approximately [tex](6.67 \times 10^-11 N \frac{m^2}{kg^2}), m1[/tex]
Therefore, gravitational and tension force are the forces.
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What is an area where atomic magnets point in the same direction called?
An area where atomic magnets point in the same direction is called a ferromagnetic domain.
What is area?Area is a quantity that measures the size of a two-dimensional surface or shape. It is expressed in square units such as square centimetres (cm2), square metres (m2) or square kilometres (km2). Area is used to describe the size of a garden, a house, a room, a city and much more. It can also be used to calculate the amount of material required for a project, such as paint, carpet or tiles. Knowing the area of a shape can help to calculate costs, and to make sure that enough materials are ordered.
In a domain, all the atoms are aligned in the same direction, creating a powerful magnetic field. This magnetic field is responsible for the magnetic properties of materials such as iron and nickel. When a ferromagnetic domain is exposed to an external magnetic field, it will become magnetized and align itself in the same direction. The strength of the magnetic field produced is based on the number of atoms in the domain and the alignment of the atoms.
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HELP WILL MARK BRAINIEST fast plssss complete the whole worksheet plsss
1. D
2. B
3. D
No 4?
5. C
What is 10 ml in tsp?
10 ml is equivalent to 2 teaspoons (tsp).
ml is an abbreviation for milliliter, which is a metric unit of volume commonly used in the scientific and medical fields. On the other hand, tsp is an abbreviation for teaspoon, which is a unit of volume commonly used in cooking and baking.
1 milliliter is equivalent to approximately 0.20288 teaspoons (tsp). Therefore, to convert milliliters to teaspoons, we can use the following conversion factor:
1 ml = 0.20288 tsp
To convert 10 ml to tsp, we can simply multiply 10 ml by the conversion factor:
10 ml x 0.20288 tsp/ml = 2.0288 tsp
Rounding to the nearest tenth, we get:
10 ml ≈ 2.0 tsp
Therefore, 10 ml is equivalent to 2 teaspoons (tsp).
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An 1.1 kW dryer is used for 30 minutes every day. What would Georgia Power charge for the month (30 days) if their going rate is 11 cents/kWhr? A. $108.90 B.$1.82 C. $1,815.00 D. $12.80
Georgia’s Power charge for the month (30 days) if their going rate is 11 cents/kWhr wil be $1.82. the correct option is option B.
The energy used by the dryer in 30 minutes can be calculated as follows:
Energy used = Power x Time Energy used = 1.1 kW x 0.5 hours (30 minutes converted to hours)
Energy used = 0.55 kWh
The total energy used by the dryer in 30 days can be calculated as:
Total energy used = Energy used per day x Number of days Total energy used = 0.55 kWh/day x 30 days
Total energy used = 16.5 kWh
The cost of the energy used can be calculated as:
Cost = Total energy used x Rate Cost = 16.5 kWh x $0.11/kWh
Cost = $1.815
Therefore, the answer is (B) $1.82.
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A rock is kicked horizontally at 15 m/s from a hill with a 45 degree slope (figure below). How long does it take for the rock to hit the ground? Show work please.
The rock will travel in a parabolic path, with an initial vertical velocity of 0 m/s. Since the rock is kicked horizontally, we can ignore the effect of gravity on its horizontal.
What is the velocity ?Velocity is the rate of change of an object's position from one point to another. It is a vector quantity that consists of both speed and direction. Velocity is usually expressed in meters per second (m/s) or kilometers per hour (km/h). The velocity of an object can be determined by dividing the distance traveled by the time it took to travel that distance. For example, if an object moves 100 meters in 10 seconds, its velocity is 10 m/s. Velocity is an important concept in physics, as it is a measure of how quickly an object is moving and can be used to calculate the energy of an object.
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Using Kinematics, The duration of the rock's impact with the ground will be 2.16 seconds.
Describe kinematics.the examination of motion without taking the mass or the motion's cause into account.
From a hill with a 45-degree slope, a rock is thrown horizontally at 15 meters per second.
We are aware that the following is the formula for the object's time of flight:
T=(2v sin )/g
where v denotes speed and denotes angle.
The time it takes for the rock to land will then be given as,
T = (2x15x45sin) / 9.81
T = (2 x 15 x 0.707) / 9.81
T = 21.21 / 9.81
T = 2.16 sec.
The duration of the rock's impact with the ground will be 2.16 seconds.
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