The slope is a straight line when the rate constant (lnk) is plotted against the inverse energy of the temperature (kelvin). Where R is a constant equal to 8.314 J/mol-K, the slope's value (m) is equal to -Ea/R.
What is the best way to define activation energy?The bare minimum additional energy needed by a reactive molecule to transform into a product is known as activation energy. The minimal quantity of energy required to activate or energize can also be used to characterize it.
What do threshold energy and activation energy mean?
Threshold energy is the bare minimum of energy required for an effective collision between reactant molecules and product formation. The additional energy needed by the reactants to undergo activation is known as activation energy.
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A roller coaster features a near vertical drop of 135 meters. If the initial velocity was zero, the mass of the cart and riders was 1,500 kg, and the velocity at the end of the drop was 45 m/s, how much of the potential energy was converted into thermal energy?
Group of answer choices
392 kJ
579 kJ
468 kJ
518 kJ
The amount of potential energy that converted into thermal energy is 468 kJ.
What is energy?Energy, which is observable in the execution of labor as well as in the form of heat and light, is the quantitative quality that is transferred to a body or to a physical system in physics.
Energy is a preserved resource, energy can only be transformed from one form to another and cannot be created or destroyed.
Hence, form conservation of energy;
the amount of potential energy that converted into thermal energy =
Initial potential energy - final kinetic energy
= 1500 × 9.8 × 135 - 1/2×1500×45²
= 465750 Joule
= 468 kJ
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which of the following is true of earth's orbit about the sun? question 57 options: it takes approximately the same time for earth as it does the rest of the planets in the solar system to orbit the sun. the orbit does not vary over millions of years. it is perfectly circular. it is elliptical.
Answer:
The orbit of the earth about the sun is very slightly elliptical
(about 91.5 to 93.5) million miles
you are about to bike down a large mountain. at the top of the mountain where the ambient pressure is 11.5 psi, your tire pressure gauge reads 28 psig. after riding down the mountain to sea level where the ambient pressure is 14.7 psi, what will the reading of your tire pressure gauge be?
At the top of the mountain where the ambient pressure is 11.5 psi, your tire pressure gauge reads 28 psig. After riding down the mountain to sea level where the ambient pressure is 14.7 psi. The tire pressure gauge at sea level will read 24.8 psig.
In this case, we can start by converting the gauge pressure at the top of the mountain (28 psig) to absolute pressure (pa) using the formula:
pa = gauge pressure + ambient pressure
pa = 28 psig + 11.5 psi
pa = 39.5 psi
At sea level, the ambient pressure is 14.7 psi, so the gauge pressure (pg) can be calculated as:
pg = pa - ambient pressure
pg = 39.5 psi - 14.7 psi
pg = 24.8 psig
So, the tire pressure gauge at sea level will read 24.8 psig.
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there are two principal scales we use. one is the major scale; the other is:
Answer:
The other principal scale is the minor scale.
Answer: Minor
Explanation:
a mass is suspended by a spring and subject to an input force function f(t). what is the relationship between the input force and the output velocity for the system? vs/fs
Equation describes the connection between a mass-spring system's input force and output velocity, m(d^2x/dt^2) + b(dx/dt) + kx = f(t).
The relationship between the input force and the output velocity of a mass-spring system is given by the equation m(d^2x/dt^2) + b(dx/dt) + kx = f(t), where m is the mass of the object, b is the damping coefficient, k is the spring constant, x is the displacement of the mass from its equilibrium position, and f(t) is the input force as a function of time.
Thus, the relationship between the input force and the output velocity is mediated by the mass, spring constant, damping coefficient, and displacement of the system.
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what is the minimum magnitude of an electric field that balances the weight of a plastic sphere of mass 6.4 g that has been charged to -3.0 nc?
Answer:
F = Q E force exerted by field on charge Q
F = M g weight of sphere
M g = Q E
E = M g / Q = .0064 kg * 9.80 m/s^2 / 3E-9 C
E = 2.09E7 Newtons/Coulomb
A net charge of –1.7 × 10–17 C is established on a gas hob ignition system. Approximately how many excess electrons on the ignition system?
According to the solving Approximately - 2.72 × 10² excess electrons on the ignition system.
What exactly is an ignition system?An electric spark is used to ignite the fuel-air mixture in a gasoline engine, and the combustion of this mixture in the cylinders generates the motive force. Related Articles: distributor reluctor breakers spark plug electric starter.
What does the ignition system do?To ignite the mixture of gasoline and air in the engine's combustion chamber at precisely the appropriate moment, the ignition system's primary function is to produce an electric spark.
According to the given information:Given charge = –1.7 × 10⁻¹⁷ C
no. of electrons = (–1.7 × 10⁻¹⁷)/(1.6 × 10⁻¹⁹)
= - 2.72 × 10²
According to the solving Approximately - 2.72 × 10² excess electrons on the ignition system.
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Use evidence and scientific reasoning to explain why the reading on the balance increased as Magnet 2 was lowered towards Magnet 1. Remember that Magnet 1's North pole was facing upwards while resting on the balance. In your response, be sure to describe the magnetic field interactions and the orientation of the magnetic poles for each magnet
The increase in the reading on the balance as Magnet 2 was lowered towards Magnet 1 was due to the interaction between the magnetic fields of the two magnets and the orientation of their magnetic poles, leading to an increase in the overall magnetic field strength.
When Magnet 2 was lowered towards Magnet 1, the reading on the balance increased because of the interaction between the magnetic fields of the two magnets.
Magnet 1, with its North pole facing upwards, creates a magnetic field with lines of force flowing out of the North pole and into the South pole. This creates a magnetic field that is stronger near the North pole and weaker near the South pole.
When Magnet 2 was brought near Magnet 1, the magnetic field of Magnet 2 interacts with the magnetic field of Magnet 1.
If the North pole of Magnet 2 is facing the South pole of Magnet 1, the magnetic fields of the two magnets will reinforce each other, leading to an increase in the overall magnetic field strength.
This increase in magnetic field strength can be detected by the balance, causing the reading to increase.
It's important to note that the orientation of the magnetic poles and the direction of the magnetic field lines play a crucial role in the magnetic field interactions between two magnets.
If the North pole of Magnet 2 was facing the North pole of Magnet 1, the magnetic fields would repel each other, causing the reading on the balance to decrease.
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explain how a light material, such as fiberglass insulation, makes an effective barrier to keep a home warm in the winter and cool in the summer.
Fiberglass insulation makes an effective barrier to keep a home warm in the winter and cool in the summer because it traps air between the fibres.
By trapping air between the fibers, fiberglass insulation functions as an efficient barrier to keep homes warm in the winter and cool in the summer. As a result, the quantity of heat transmission between homes and the outside is considerably reduced, resulting in low conductive insulation.
Fiberglass performs admirably as a thermal insulator. It works well as acoustic insulation as well. Specialized acoustic glasswool batts are the best choice for energy-efficient soundproofing of your home. The thickness and R-Value of a fiberglass product determine how well it can withstand heat flow.
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on a scale in which the sun is about the size of a grapefruit and the earth is the size of the ball point in a pen, how far away is the sun from the earth?
On a scale in which the Earth is roughly 15 meters distant from the Sun, which is the magnitude of a grapefruit. The nearest stars, other than the Sun, are located far away, roughly across the entire United States.
A star is born?Stars form within dust clouds and are dispersed throughout the majority of galaxies. A well-known example of this kind of dust cloud is the Orion Nebula. Strong turbulence in the clouds creates knots with adequate mass.
How long do stars actually live?Cosmologically speaking, the largest supermassive black holes have short lives—at most a few million years. They live short lives and die young. Smaller stars have much less fuel to begin with, such as those with energies of less about 10% of neutrons or protons.
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a refracting and reflecting telescope have the same diameter; the refracting telescope will be much longer than the reflector. group of answer choices true false
A refracting and reflecting telescope have the same diameter; the refracting telescope will be much longer than the reflector'
The answer choice is true.
Because refracting and reflecting telescopes are designed differently, they can have different lengths even though they have the same diameter. Refracting telescopes, commonly known as refractors, bend and concentrate light to create images. The length of a refractor is mostly dictated by the size of its objective lens, which is the primary light-gathering lens at the front of the telescope. A bigger lens necessitates a longer tube in order to accommodate it, resulting in a greater overall length of the telescope.
Reflecting telescopes, also known as reflectors, on the other hand, employ mirrors to gather and focus light. The length of a reflector telescope is dictated by the size of its primary mirror. A longer optical tube is required to accommodate a larger mirror, but it does not have to be as long as a refractor of the same diameter because the light from the mirror travels a shorter distance before reaching the eyepiece.
Even if a refractor and a reflector have the same diameter, the refractor will be considerably longer due to the length necessary to accommodate its huge lens, but the reflector will have a lower overall length since the light it gathers travels a shorter journey.
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a firefighter is helping the woman shown in the figure below. the woman's weight is 120 lb. what's the tension (in lb) in the rope connecting the woman to the firefighter?
The tension in the rope is equal to the weight of the woman, which is 120 lb. Since the woman is not accelerating, the forces acting on her must be balanced, meaning the tension in the rope must equal her weight. Therefore, the tension in the rope is 120 lb.
What is tension?
Tension is a state of mental or emotional strain, resulting from opposing forces or influences. It is a feeling of inner strain caused by a clash of emotions, ideas, or beliefs. It can also result from physical causes such as a lack of sleep, worry, physical exertion, and even hunger.
Tension can manifest itself in physical symptoms such as headaches, neck pain, muscle tightness, and fatigue. It can also lead to emotional problems such as anxiety, irritability, and depression. It is important to recognize and address tension in order to maintain good mental and physical health.
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Rank the boxes on the basis of the magnitude of the normal force acting on them.
Rank from largest to smallest. To rank items as equivalent, overlap them.
1) 130N--->7kg
2) 150N--->1kg
3) 150N--->7kg
4) 120N--->3kg
5) 140N--->5kg
6) 140N--->3kg
150N--->7kg, 5) 140N--->5kg, 1) 130N--->7kg, 4) 120N--->3kg, 6) 140N--->3kg and 2) 150N--->1kg. The normal force acting on each box is determined by the weight of the box.
What is force?
Force is an influential physical quantity that can cause an object to change its velocity and/or shape. It is a vector quantity meaning it has both magnitude and direction.
Forces can cause objects to accelerate, decelerate, or change direction. Examples of forces include gravitational force, electromagnetic force, and frictional force. Force is measured in units of Newtons (N). Force is an important concept in physics as it is one of the fundamental concepts of the subject.
Since the weight of each box is determined by its mass, the box with the largest mass will have the greatest.
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what is the uncertainty in the position (in m) of an electron moving 30.0 m/s accurate up to 0.00100 %
The uncertainty in the position of the electron moving at 30.0 m/s is 0.0003 m.
What is electron?Electron is an open-source framework that allows developers to create cross-platform desktop applications using web technologies like JavaScript, HTML, and CSS. It is based on the Chromium web browser and Node.js runtime, and developers can use it to build applications for Windows, Linux, and macOS. Electron is used by many popular applications, including Slack, Visual Studio Code, and Atom. It provides a range of powerful tools and APIs to help developers create feature-rich applications quickly and easily.
The uncertainty in the position of the electron is determined by the uncertainty in its velocity, which is 0.00100%.
This means that the uncertainty in the position of the electron is equal to 0.00100% of 30.0 m/s, or 0.0003 m.
Therefore, the uncertainty in the position of the electron moving at 30.0 m/s is 0.0003 m.
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Which source of energy is used in a nuclear power station to generate electrical energy
Steam is produced when the cooling agent is heated by nuclear fusion. Turbines, or wheels turned by a flowing current, are rotated by the steam. The generators, which are engines that produce power, are driven by the turbines. Above process is followed in a nuclear power station to generate electrical energy.
Electrical energy is the energy that emerges from the kinetic or potential energy of charged particles. It is referred to be energy that has undergone transformation from overall electric potential energy.
Electrical energy can be described as the result of electrons travelling between two points. The movement of charged particles along or through a medium is known as electricity or current (like a wire).
The basic unit of electrical energy is the joule, also referred to as a watt-second. One joule of electrical energy is produced when one amp of current flows through a circuit for one second while a potential difference of one volt is applied across it.
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what happens when you touch the ball with the rod? what happens when you touch the ball with the rod? the aluminum ball is repulsed by the foam rod. the aluminum ball does not interact with the foam rod. the aluminum ball is attracted to the foam rod.
The aluminum ball will be repelled by the foam rod, meaning it will be pushed away from the foam rod and move in the opposite direction.
What is the direction?The direction can be defined as the route, course, or path followed by a person, group, or thing. It is the line of orientation that guides the way in which something is directed or moved. Direction also refers to the order or path of movement, be it forward, backward, up, down, or in any other specified way. Direction is an important element in life, as it serves to guide people and objects throughout their respective journeys. It can be used to explain the various movements of people, animals, and objects in the physical world, or it can be used to describe the paths taken to reach a goal. Direction is not only physical, but also mental, as it can refer to a persons way of thinking and their overall attitude.
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In Platos credo, Socrates, believes that he should follow the laws of the state Athens, because?
In Plato's philosophy, Socrates believed that he should follow the laws of the state of Athens because he believed in the idea of the "philosopher-king."
Who was Socrates?
Socrates was a classical Greek philosopher, credited as one of the founders of Western philosophy. He is best known for his method of inquiry, called the Socratic method, and for his teaching style, which was dialogic and aimed at getting students to think critically and develop their own ideas.
According to Socrates, the laws of the state were a reflection of the absolute and unchanging moral values that exist in the world. He believed that as a philosopher, it was his duty to live in accordance with these moral values, and thus to follow the laws of the state. In this way, Socrates saw himself as a servant of the divine, and believed that by following the laws, he was serving the greater good and promoting the welfare of the city.
Hence, In Plato's philosophy, Socrates believed that he should follow the laws of the state of Athens because he believed in the idea of the "philosopher-king."
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All nuclear reactors operate on the same principle but may use different designs true or false
"All nuclear reactors operate on the same principle but may use different designs." The given statement is true.
All nuclear reactors work on the principles of generating great amounts of energy by achieving controlled chain reactions in the reactors. Nuclear reactors work by using the heat energy released from splitting atoms of radioactive elements that generate electricity. Most nuclear electricity is generated using just two kinds of reactor which were developed in the 1950s and improved since then.
The reactors of the first generation are not in use, and most of the reactors that are used now are from the second generation. Both huge and tiny new designs are emerging. A nuclear reactor is a device that produces and controls the release of energy from the fission of atoms of certain elements.
Electricity can also be generated from nuclear power reactors where the energy released from this fission is converted into heat energy and this heat energy is used to make steam. The two main types of nuclear reactors are- Pressure water reactors and boiling water reactors.
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The physical properties of a mineral are largely due to its
Physical properties of a mineral is mainly due to the atomic structure as well as the crystalline structure of the mineral. Each mineral will have its own characteristic crystalline structure.
The important physical properties are color, crystal form, hardness, cleavage, density and specific gravity. All these properties are based on the arrangement of atoms. It atoms are tightly packed harder will be the mineral, greater the density.
The location of atoms or ions in the crystalline structure determines the cleavage. It happens through the line where the bonds are weakest. The more the space between the atoms, less the density and specific gravity.
So all these physical properties are imparted due to the atomic structure and arrangement of atoms in its crystal.
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A steel ball whose mass is 100 g is rolling at a rate of 2.8 m/sec. What is it’s momentum?
Answer:
The momentum of the steel ball is 0.28 kg m/sec.
Explanation:
The momentum of an object can be calculated using the formula: momentum = mass x velocity. In this case, the mass of the steel ball is 100 g, which is equivalent to 0.1 kg. The velocity of the ball is 2.8 m/sec. Plugging in the values into the formula, we get:
momentum = 0.1 kg x 2.8 m/sec
momentum = 0.28 kg m/sec
So the momentum of the steel ball is 0.28 kg m/sec.
a man skis down from the top of a hill 1450.0 m high, starting from rest. if he loses 70% of his initial mechanical energy to friction during his descent, what is his speed in m/s at the base of the hill?
Speed of a man at the base of the hill is 93.27m/sec if a man skies down from the top of hill 1450m high.
In actual sciences, mechanical energy is the amount of possible energy and motor energy. The rule of preservation of mechanical energy expresses that in the event that a disengaged framework is subject just to moderate powers, the mechanical energy is consistent. In the event that an item moves the other way of a moderate net power, the potential energy will increment; and if the speed (not the speed) of the item changes, the dynamic energy of the item likewise changes.
In every single genuine framework, nonetheless, non-conservative powers, for example, frictional powers, will be available, however in the event that they are of irrelevant greatness, the mechanical energy changes nearly nothing and its protection is a valuable estimation. In flexible crashes, the active energy is moderated, yet in inelastic impacts some mechanical energy might be changed over into nuclear power. The comparability between lost mechanical energy and an expansion in temperature was found by James Prescott Joule.
At 1450m height,mechanical energy is equal to potential energy. Potential energy is all due to position of man.
Potential energy=mgh where m is the mass and g is the acceleration due to gravity and h is the height.
So,potential energy=m×10×1450Joules.
Now,when he starts from rest and losses 70% of energy in friction,it means 30% mechanical energy will convert into kinetic energy.
So,30% of mechanical energy=kinetic energy of man.
=>(30/100) ×m×10×1450=(1/2)×m×v²
=>3×1450×2=v²
=>v²=8700
=>v=√8700
=>v=93.27m/sec.
Hence,speed of man at base is 93.27m/sec.
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Which circuits are parallel circuit?♂️
Answer:
OPTION C is correct.
Explanation:
A circuit composed solely of components connected in series is known as a series circuit; likewise, one connected completely in parallel is known as a parallel circuit.
The driver of a car moving with a uniform speed of 40m/s observes a truck approaching
in the opposite direction with a speed of 20m/s.Calculate the speed of the car relative to that of the truck.
Answer:
60m/s
Explanation:
Whenever two objects are moving in opposite direction the relative speed is obtained by adding the speeds of the two objects.
Here the two vehicles are moving with speed 20m/s and 40m/s .
So the relative speed of the car relative to that of the truck will be,
(40 + 20 ) m/s
60m/s
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a rotating fan completes 1200 revolutions every minute. consider the tip of a blade, at a radius of 0.15 m. (a) through what distance does the tip move in one revolution? what are (b) the
The angular velocity of the tip of the blade is angular velocity = 2 * π * 1200 rotations / minute = 7539.82 rad/min.
(a) To find the distance the tip of the blade moves in one revolution, we can use the circumference of a circle:
distance = 2 * π * radius = 2 * π * 0.15 m = 0.94 m
So, the tip of the blade moves a distance of 0.94 meters in one revolution.
(b) To find the linear velocity of the tip of the blade, we can use the formula for linear velocity:
linear velocity = distance / time = 2 * π * radius * rotations / minute
Since the fan completes 1200 revolutions per minute, the linear velocity is:
linear velocity = 2 * π * 0.15 m * 1200 rotations / minute = 94.25 m/s
To find the angular velocity of the tip of the blade, we can use the formula for angular velocity:
angular velocity = 2 * π * rotations / minute
So, the angular velocity of the tip of the blade is:
angular velocity = 2 * π * 1200 rotations / minute = 7539.82 rad/min.
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The wavelength of a ray of blue light is 475 nm. If its frequency is x×10^14Hz
what is the value of x?
The value of the variable in the frequency will be 3.316.
What is the wavelength and frequency of light?
A waveform signal that is carried in space or down a wire has a wavelength, which is the separation between two identical places (adjacent crests) in consecutive cycles. This length is typically defined in wireless systems in meters (m), centimeters (cm), millimeters (mm), or nanometers (nm).
The formula of the frequency is given as,
f = c / λ
Where 'f' is the frequency, c is the speed of light, and 'λ' is the wavelength.
The wavelength of a ray of blue light is 475 nm. If its frequency is x · 10¹⁴ Hz. Then the value of the variable 'x' is given as,
x · 10¹⁴ = (3 · 10⁸) / (475 · 10⁻⁹)
Simplify the equation, then we have
x · 10¹⁴ = (3 · 10⁸) / (475 · 10⁻⁹)
x = (3 · 10⁸) / (475 · 10⁻⁹ · 10¹⁴)
x = (3 · 10⁸) / (475 · 10⁵)
x = 6.316
The value of 'x' is 6.316.
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Two identical metal balls are suspended by insulating threads. Both balls have the same net charge. In this problem, do not assume the balls are point charges.(a) Draw a separate free-body diagram for each ball. Label the forces.(b) Suppose the charge on the second ball is reduced slightly so that it is less than that on the first ball. Predict whether the angle that ball 1 makes will be greater than, less than, or equal to the angle that ball 2 makes with the vertical. Explain.(c) Predict what will happen if the net charge on ball 2 is reduced to zero. Make a sketch to illustrate your answer.
In this situation, both balls will exert electrostatic force on each other in the first example.
Here, in the first scenario, both balls will interact electrostatically. The two balls will reject one another as a result of this electrostatic force.In addition, there will be a vertical downward gravitational force acting on the two balls.
Now that we know, the angle between the two balls will be greater as the horizontal force separates the two balls as the electrostatic force of repulsion between the two balls increases.
As we decrease the charge on one ball, the net electrostatic force between the two balls also reduces since we know that the net electrostatic force between two balls depends on the product of two charges.
The two balls then travel closer to one another as the angle between them diminishes. Additionally, we can see from the free body diagram of two balls that all of the forces acting on the balls are the same; as a result, both balls' angles of inclination with respect to the vertical are same.
Because of this, the angle created by ball l with the vertical equals the angle formed by ball 2.
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Showing your calculation determine the heat capacity of the metals for each trial: a) known metal : cu trial 1:
The heat capacity has to do with the amount of heat that can be added to cause a temperature change.
How do you experimentally determine the heat capacity?The question is incomplete but I will give you an overview of the experiment determination of the heat capacity.
The heat capacity can be experimentally determined using the method of calorimetry. This involves measuring the change in temperature of a substance as heat is added to it or taken away from it. By knowing the heat added or removed and the resulting change in temperature, the heat capacity of the substance can be calculated using the equation:
C = ΔQ / ΔT
where C is the heat capacity, ΔQ is the amount of heat added or removed, and ΔT is the resulting change in temperature.
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jeremiah is on location shooting a king cobra snake that is extremely venomous, meaning that he absolutely cannot get too close. however, he really wants to show as much detail as possible. what type of lens might be helpful for jeremiah to use on this shoot?
A zoom lens is an SLR or DSLR lens that offers a different focal length for the photographer to select from.)
What is the range of zoom lens?
Standard zoom lenses usually have middle focal length of around 50mm (35mm film equivalent) and cover a range that includes wide-angle and a telephoto range of around 70mm to 100mm. Superzoom lenses cover an even wider range, from wide-angle up to as much as 300mm.
What is a good zoom lens size?
The longer the focal length, the closer you can zoom in on a distant subject. Many entry-level DSLRs come with an 18-55mm lens in the package, which is a good choice as a general-use lens. For more zoom power, you'll need a telephoto lens, which typically falls within the 55-300mm range.
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what type of motion is believed to cause concussions to occur? what device is described as a potential alternative that would prevent this type of motion and potentially prevent some concussions?
Movements that cause a concussion are body movements that can vibrate the brain so hard that the brain moves back and forth quickly. Tools that avoid concussion are helmets, mouth guards, and other head protectors.
Definition of ConcussionConcussion is a condition in which the brain is injured as a result of a hard blow, impact, or shock. A concussion is classified as a mild brain injury because it is usually not life threatening.
A common sign of a concussion is a headache that lasts for more than a few minutes. Some signs that could also indicate a concussion include blurred vision, and/or feeling dizzy or foggy.
This concussion is part of Newton's three laws. Where when an action is given to an object, the object will give an equal and opposite reaction. With different masses and different accelerations.
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ions are a. electrically neutral b. electrically charged c. formed by the gain or loss of protons from the nucleus d. electrically charged and formed by the gain or loss of protons from the nucleus e. none of the choices are correct
Ions are generated when protons are gained or lost from the nucleus and are electrically charged. Choice (d)
Ions are charged particles that are created when an atom gains or loses one or more electrons. A charged atom or molecule is known as an ion. It is charged because the atom or molecule's number of protons and electrons is different. An atom becomes a negatively charged ion, or anion, when it gains one or more electrons. On the other hand, when an atom gains one or more electrons, it changes into a negatively charged cation or ion. The difference between the number of protons and electrons makes up an ion's charge.
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