7) A boy is flying to kites at the same time,
He has 380 feet of line out to one kite and
420 ft. to the other. He estimates the angle
between them to be 30 degrees.
Approximate the distance between the
kites.
Answers
Answer:
hope this helps :)
Explanation:
Related Questions
which types of materials have a molecular structure that makes them good conductors explain how understanding this relationship can help people design more efficient technologies
Answers
Answer: Metals
Explanation:
The metals are the conductors of electricity. These are made up of atoms which conducts electricity in the form of electrons in the outer shell that can move freely. These take away the electric charge on the entire metallic system. This way the metal conducts electricity and can also pass electricity to other surfaces if come in their contact. Thus the metals are used for creating equipment of technological importance.
Answer:
Metals
Explanation:
Which sentences describe the cyclone device?
A cyclone device accumulates fine particulates from the air by making a dirty air stream flow in a spiral path inside a
cylindrical chamber. It consists of several long and narrow fabric filter bags suspended upside-down in a large
enclosure. When dirty alr enters the chamber, the larger particulates strike the chamber wall and fall into a conical dust
hopper at the bottom. Fans blow dirt-filled air upward from the bottom of the enclosure, trapping dirt particles inside the
filter bags and releasing clean air from the top. The top of the chamber has an outlet that lets out cleaned air.
Answers
Answer: Option A
Explanation:
A cyclone device is an instrument which measures the cyclone. In this case the device collects the particulates mixed in air which makes the air dirty.
It revolves inside the cylindrical chamber in a forming a spiral path. This is what a cyclone is.
In real, the cyclone is also the same but is so huge that it carries away the things coming in its path. These things can be homes, trees and other materials.
This is very destructive and cause loss of life and loss of assets.
Which piece of evidence from the article explains WHY the sun has a larger force of gravity
than the Earth?
(A)
Isaac Newton, an English scientist, discovered a law, or truth, about
gravity in the late 1600s.
(B)
The greater the mass of an object, the greater is its force of gravity.
(C)
Even a speck of dust has a force of gravity
(D)
The smaller the distance, the greater is the force of gravity between them.
Answers
Answer:
(B)
The greater the mass of an object, the greater is its force of gravity.
What happens to a falling object when the force of air resistance equals the force of gravity?
A)It shows increasing acceleration.
B)It begins to slow down.
C)It reaches terminal velocity.
D) It shows projectile motion.
Answers
Answer:
Its C.
Explanation:
When the two forces of gravity and force resistance become the same, the object no longer speeds up , and it doesn't slow down either. This is called terminal velocity .
So ,C is the correct answer .
Hope it works out !!
When the force of air resistance equals the force of gravity, the falling object reaches terminal velocity. Hence, option (C) is correct.
What is terminal velocity?The maximum velocity attained by an object as it falls through a fluid is known as terminal velocity. It occurs when the sum of the drag and buoyancy forces acting on the object equals the downward force of gravity. Because the object's net force is zero, it has no acceleration.
An object is moving at its terminal velocity in fluid dynamics if its speed is constant due to the restraining force exerted by the fluid through which it is moving.
As an object's speed increases, so does the drag force acting on it, which is also affected by the substance it is passing through. The drag or force of resistance will equal the gravitational pull on the object at some speed.
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HI! I NEED HELP ASAP!!
Why are electromagnets used in metal scrap yards?
A.They are temporary magnets, so they can be turned on and off.
B. They are very powerful permanent magnets.
C. They are weak permanent magnets.
D. They are temporary magnets, so eventually the metal just falls off.
Answers
Answer:
The answer is A. They are temporary magnets, so they can be turned on or off.
Explanation:
An Electromagnet consist of a soft ion core in a current carrying solenoid that is wound in opposite direction round the two arms of a bar.
They are temporary magnets and they loose their magnetic property the moment they are turned off.
Answer:
A. They are temporary magnets, so they can be turned on or off.
Explanation:
A scientist places a strip of hot metal on top of a block of another metal with a lower melting point. The second metal quickly melts. What is the main type of heat transfer responsible?
Select one:
a. Convection, because the metals touch and cold from the block moves to the warmer strip of metal, cooling it down
b. Conduction, because both metals are in the sun and melt as the sun's rays heat them
c. Convection, because heat from the strip of metal heats the air around it, and then that warm air heats the metal block
d. Conduction, because the heat energy is absorbed by the metal atoms in the block. Once they have absorbed enough energy, they become liquid
Answers
Answer:
D:
Explanation:
Conduction because the heat energy is transferring directly from the separate metals convection involves "currents" like in a liquid or a gas. When you turn on the stove with a pot of water on the burner the water at the bottom of the pot gets heated first almost immediately this water rises and cooler water falls. Basically the water is "stirring" or shifting, exchanging the heat energy this is why water heats so evenly.
Answer:
D
Explanation:
The heat transfer that we'll have will be:
- At first, the metal bar will emanate heat through radiation, to the atmosphere, and to the second metal, through conduction.
- Because of this, the second bar will start to increase it's temperature, up to the fusion point, spending the energy received on the fusion, and also radiating heat to the atmosphere. It won't emit heat in any other form, since heat transmission can happen only from a hot body to a cooler one, and the only things in contact are the two bars.
What is the path that an electric current follows called
Answers
A negative test charge experiences a force to the right as a result of an electric field. Which is the best conclusion to draw
based on this description?
The electric field points to the left because the force on a negative charge is opposite to the direction of the field.
The electric field points to the right because the force on a negative charge is in the same direction as the field
O No conclusion can be drawn because the sign of the charge creating the field is unknown
O No conclusion can be drawn because the amount of charge on the test charge is unknown
Answers
Answer:
The correct option is (A).
Explanation:
The direction of electric force is in the direction of electric field. The electric force acting on a charged particle is given by :
F = qE, q is magnitude of charge
We have, a negative test charge experiences a force to the right as a result of an electric field. It would mean that the electric field points to the left because the force on a negative charge is opposite to the direction of the field.
**PLEASE QUICKLY **A circuit has a resistance of 250 and is powered by a 120 V battery
The current in the circuit, to the nearest tenth, is
____А.
Answers
Answer:
Current, I = 0.48 A
Explanation:
We have,
Resistance of a circuit is 250 ohms
Voltage of the battery is 120 V
It is required to find the current flowing in the circuit. Let I is the electric current. Ohm's law is given by :
[tex]V=IR\\\\I=\dfrac{V}{R}\\\\I=\dfrac{120}{250}\\\\I=0.48\ A[/tex]
So, the current in the circuit is 0.48 A.
Find the velocity of a wave of period 2 s and wavelength 0.5m. *
Answers
Answer:
The velocity of wave is 0.25m/s
Explanation:
First, you have to find the fequency using the formula, F = 1/Time :
[tex]f = \frac{1}{t} [/tex]
Let t = 2s,
[tex]f = \frac{1}{2} [/tex]
[tex]f = 0.5Hz[/tex]
Next, you have to use speed formula, V = f×λ :
Let f = 0.5Hz,
Let λ = 0.5m,
[tex]v = 0.5 \times 0.5[/tex]
[tex]v = 0.25[/tex]
Whenever energy changes form, people sometimes say that some energy is "lost." What is meant by this?
A. The energy is not truly lost; it transforms into forms that are not easily put to use.
B. The process of changing form reduces the total amount of energy in the universe.
C. Whenever energy changes form in one location, a corresponding change in the opposite direction must take place somewhere else.
D. Sometimes a "mistake" or an inefficiency in the transformation causes energy to be destroyed.
Answers
Answer:
A. The energy is not truly lost: it transforms into forms that are not easily put to use.
Explanation:
This is due to the fact that when we use energy, it seems to have disappear, but it really hasn't. In fact, when we use energy, it is changing into another form that has to be converted in order for energy to be present once again.
Answer:
A
Explanation:
Lasers can be used in
in place of a knife.
Answers
Answer: No
Explanation:
Laser can cut many things,
its cutting is so popular largely because of its versatility. Laser cutterscan cut a wide variety of materials – anything from paper, wood, cork, acrylic and foam to different types of metals. Still, there are some materials that would seemingly fit well into this list but should never be cut using a laser cutter.
select all that apply so it’s not just one answer. please and thanks :))
Answers
when discussing the earths magnetic field we could say that the earth has a
Answers
North Magnetic Pole
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A ____ is another name for a group of elements with similar properties
on the periodic table of elements.
Answers
Explanation- There are 18 numbered groups in the periodic table. The elements in a group have similar physical or chemical characteristics and some groups have a specific name, for example group 17 (the halogens).
Answer:
Family
Explanation:
The groups of elements are called families
What energy transformation takes place in a fire?
radiant energy to thermal energy
thermal energy to nuclear energy
chemical energy to thermal energy
Answers
Answer:
Chemical Energy To Thermal Energy
Explanation:
Fire is a chemical reaction. So, because of chemical reactions, the temperature raises to ignition temperature and results as fire. And then it releases photons(that generates heat after being hit by any other matter)
Answer:
Coal is burned at a power plant. The chemical energy released as the coal is burned heats water and turns it into steam.
Explanation:
If that makes since!
what is the resistance of a toaster that uses 2A when connected to a 120V power source?
Answers
Answer:
60 ohms
Explanation:
From Ohm's Law:
V = IR
Where V = 120volts
I = 2A
R = ?
Note that R,V and I represents resistance, voltage and current respectively.
Substituting the above values into the formula.
V = IR
120v = 2×R
120= 2R
Making R the subject
R =120/2
R = 60 ohms
Hence the resistance of the toaster will be 60 ohms.
Which of the following scenarios present an object with kinetic energy? Select all that apply.
A. a golf ball rolling across the green toward the cup
B. a flock of birds flying through the sky on their way to their winter living area
C. a book sitting on a shelf in the library
Answers
I think the right option are A and B
Those energy which is possessed by a body due to virtue of its motion is called kinetic energy.
Hope it helps...
Answer:
A. a golf ball rolling across the green toward the cup
B. a flock of birds flying through the sky on their way to their winter living area
Explanation:
Kinetic energy is the energy that an object has because of its motion. This energy can be converted into other kinds, such as gravitational or electric potential energy, which is the energy that an object has because of its position in a gravitational or electric field.
Select all that apply.
The following diagram shows the path of a planet around the Sun. Kepler discovered that _____.
A)area A = area B
B)the distance from P2 to P3 is half the distance from P5 to P6
C)the speed in the interval from P1 to P2 is twice the speed in the interval from P6 to P1
D)the speed in the interval from P1 to P2 is less than the speed in the interval from P3 to P4
Answers
Answer:
The right answer is area =Area C
Explanation:
We can solve the problem by using kepler's law of planetry motion.
Kepler discovered that area B = area C because of its similar distance of orbit from the sun.
What Kepler discovered?A certain planet sweeps out an area B from the point P3 to P4 in a time t while on the other hand, for the same interval of time t, the planet sweeps out an area C from point P4 to P5, that is equal to the previous area according to second Kepler's law.
So we can conclude that Kepler discovered that area B = area C because of its similar distance of orbit from the sun.
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A bird is flying with through the air with a speed of 18.0 m/s. As it flies, it holds in its claws a 2 kg fish that it
just caught moments ago. Suddenly, the fish wiggles a bit the bird loses its grip, and the fish falls 5.4 m, landing
in the lake below. What speed does the fish have right before safely splashing back into the lake?
Answers
Which actions are evidence that a chemical reaction has occurred? Select five options. a change in color the formation of a precipitate a clear liquid becoming cloudy a change in shape the formation of bubbles the formation of smoke
Answers
Answer:
Explanation:
Answer:
b
Explanation:
Ernesto is an engineer who is trying to develop a lighter, stronger carbon wire. He looks to nanotechnology, because he wants a wire with high resistance so it can give off heat. Where is Ernesto’s error? Carbon wires are heavy. Carbon wires have low resistance. Carbon wires are weak. Carbon wires are not a form of nanotechnology.
Answers
Answer:
B. Carbon wires have low resistance.
Explanation:
Nanotechnology is a technology that deals with the study and applications of matter on a very minute scale, [tex]10^{-9}[/tex]. This technology has a lot of applications in various fields of study and has been used in the fabrication of carbon nanotubes.
Carbon nanotubes are ultra thin carbon wires which can be used majorly in electronics. This wire has remarkable properties (it behaves as a metal or semiconductor) that make it suitable for electronic applications.
Ernesto made an error by planning to use carbon wire to generate heat. Carbon nanotubes has a low resistance, thus low thermal dissipation.
Answer:
B
Explanation:
edge
Please please please please PLEASE help!!!
Brainliest for whoever gets this right!
Describe how an earth wire and a fuse can protect an iPad with a metal casing
- 5 clear simple points
Answers
Answer:
Because the electricity flows through and creates static bonds around the metal case which creates a bond with other fields that protects it.
Explanation:
Below image, please give me the answer quick.
Answers
Answer:
Option A. ⅓V
Explanation:
We'll begin by calculating the total resistance in the circuit. This is illustrated below:
R1 = 1Ω
R2 = 2Ω
R3 = 3Ω
RT =..?
Since all three resistor are in series connections, the total resistance can obtain as follow:
RT = R1 + R2 + R3
RT = 1 + 2 + 3
RT = 6Ω
Next we shall determine the current flowing through the circuit.
Voltage (V) = 2V
Resistor (R) = 6Ω
Current (I) =..?
V = IR
2 = I x 6
Divide both side by 6
I = 2/6
I = ⅓A
Finally, we can obtain the voltage across the 1Ω resistor as follow:
Resistor (R) = 1Ω
Current (I) = ⅓A
Voltage (V) =?
V = IR
V = ⅓ × 1
V = ⅓V
Therefore, the potential difference across the 1Ω resistor is ⅓V
The periodic table is often referred to as the chemists'
______.
Answers
Answer:
calendar
Explanation:
I just need a full answer here not only so I can answer the question, but also so that I can learn.
Locate the main groups of elements in each column on the periodic table, and identify the number of valence electrons there are in each element in a particular group. Infer why some elements are more reactive than others due to their number of valence electrons.
Answers
Answer: Number of valence electrons determine how fast or easy for an atom to gain stability. Either by gaining electrons or by losing electrons.
Group one and seven elements react fast because they only have one electron to gain or lose.
Explanation:
Number of valence electrons tell us the number of electrons an atom will gain or lose in order to attain stability in electron configuration.
All the elements in a particular group will have the same number of valence electrons as follows:
Group one - 1 valence electron
Group two - 2 valence electrons
Group three - 3 valence electrons
Group four - 4 valence electrons
Group five - 3 valence electrons
Group six - 2 valence electrons
Group seven - 1 valence electron
Group eight - 0 valence electron
Some elements are more reactive than the others because of the electron affinity, oxidation state and electronegativity of the atoms
For instance, elements in group 7 are more reactive than others because of their oxidation state and they have very high electronegativity.
Also, group one elements are more reactive because they only have one electron to loose.
A book with a mass of 3.3 kg sits on a bookshelf. If it has a gravitational
potential energy of 57 J, how high is the shelf? The acceleration of gravity is
9.8 m/s2
Answers
Given that,
Mass of the Book (M) = 3.3 Kg Gravitational Potential Energy (P) = 57 J Acceleration Due to Gravity (g) = 9.8 m/s²We have to find the height of the shelf
We know that,
[tex]\tt P = MgH [/tex]
Putting the values,
[tex] \sf \: 57 = 3.3 \times 9.8 \times h \\ \\ \implies \: \sf \: 57 = 32.34 \times h \\ \\ \implies \: \sf \: h = 1.76 \: m \: (approx)[/tex]
The height of the shelf is 1.76 mThe height of the shelf is 1.76 m
What is the meaning of mass in the church?
The definition of mass is the Liturgy of the Eucharist or a body of matter or a large number of people or things. An example of mass is a Roman Catholic church service. An example of mass is a pile of clay. An example of a mass is a gathering of thousands of people.
Given that,
Mass of the Book (M) = 3.3 Kg
Gravitational Potential Energy (P) = 57 J
Acceleration Due to Gravity (g) = 9.8 m/s²
We have to find the height of the shelf
We know that,
p = MgH
Putting the values,
57 = 3.3 × 9.8 × h
→ 57 = 33.34 × h
→ h = 1.76 approx
The height of the shelf is 1.76 m
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Monochromatic light is incident on two slits separated by 0,2 mm. An interference pattern is observed on a screen 3,7 m away. The distance between the 3rd dark fringe and the central antinode is 0,048 What is the wavelength of the light? Write your answer in sicentific notation or in decimal form
Answers
Answer:
λ = 864 nm
Explanation:
To find the wavelength of the light you use the following formula, which determines the position of the m-th fringe in an interference pattern:
[tex]y_m=\frac{m\lambda D}{d}[/tex] (1)
ym: position of a bright fringe
D: distance from the slits to the screen = 3,7 m
d: distance between slits = 0,2mm = 0,2 *10^-3 m
m: order of the fringe
λ: wavelength of the light
You have the distance from the central peak to the third fringe (0,048m). Then, you can use the equation (1) with m=3 and solve for the wavelength:
[tex]y_3=\frac{3\lambda D}{d}\\\\\lambda=\frac{dy_3}{3D}=\frac{(0,2*10^{-3}m)(0,048m)}{3(3,7m)}=8,64*10^{-7}m\\\\\lambda=864*10^{-9}m=864nm[/tex]
henc, the wavelength of the light is 864nm
A fisherman noticed that a float makes 30 oscillations in 15 seconds. The distance between two consecutive crests is 2 m. What is the period and frequency of the wave? What is the wave speed?
Answers
Answer:
Period T = 0.5 s
Frequency F = 2 Hz
Wave speed V = 4 m/s
Explanation:
Given that the
Number of oscillations = 30
Time taken = 15 seconds
The distance between two consecutive crests is called wavelength
Wavelength = 2m
Period is the ratio of time and the number of oscillations
Period T = 15/30 = 0.5 seconds
Frequency F is the reciprocal of period. That is,
F = 1/T
F = 1/0.5 = 2Hz
Wave speed V is the product of frequency and wavelength
V = 2 × 2 = 4m/s
Answer:
Answer:
Period T = 0.5 s
Frequency F = 2 Hz
Wave speed V = 4 m/s
Explanation:
Please help me whit this question
Answers
Answer:
Gypsum
Explanation:
Gypsum is a soft sulfate mineral composed of Calcium Sulfate di-hydrate. It is widely used in composition of fertilizer. It is also known as land plaster. On adding gypsum to soil, the quality of soil is improved. It conditions the soil and adds nutrients. The properties of soil is improved. Hence, the correct answer is Gypsum.
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