The two waves shown here are the same distance from point X and are traveling to
ID: 1624832 • Letter: T
Question
The two waves shown here are the same distance from point X and are traveling toward each other.
What is the amplitude of the resulting wave when the two waves meet at point X?
0.0 cm
1.0 cm
2.0 cm
4.0 cm,
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The image shows the right-hand rule being used for a current-carrying wire.
Which statement describes what the hand shows?
When the current flows down the wire, the magnetic field flows out on the left side of the wire and in on the right side of the wire.
When the current flows up the wire, the magnetic field flows out on the left side of the wire and in on the right side of the wire.
When the current flows down the wire, the magnetic field flows in on the left side of the wire and out on the right side of the wire.
When the current flows up the wire, the magnetic field flows in on the left side of the wire and out on the right side of the wire.
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Emissions from alpha decay require the least amount of shielding.
Which best describes why the emissions from alpha decay are so easily blocked compared to the emissions of other types of radioactive decay?
Alpha decay releases visible light, which has less energy than the light released during gamma decay.
Alpha decay releases particles that have less mass and charge than the particles released during beta decay.
Alpha decay releases particles that have less mass and charge than the particles released during gamma decay.
Alpha decay releases particles that have more mass and charge than the particles released during beta decay.
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An 8.0 cm object is 40.0 cm from a concave mirror that has a focal length of 10.0 cm. Its image is 16.0 cm in front of the mirror.
The height of the image produced by the mirror, to the nearest tenth, is <input type="text" data-cke-saved-name="4927659e-33b8-11e4-ab2c-bc764e043e0c_103251" name="4927659e-33b8-11e4-ab2c-bc764e043e0c_103251" id="4927659e-33b8-11e4-ab2c-bc764e043e0c_103251" return="" api.question.ensurenumeric(event);"=""> cm.
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Which statements correctly describe the effect of distance in determining the gravitational force and the electrical force? Check all that apply.
The gravitational force has an infinite reach.
The electrical force has an infinite reach.
The gravitational force is inversely proportional to the distance.
The electrical force is inversely proportional to the distance.
The gravitational force is inversely proportional to the square of the distance.
The electrical force is inversely proportional to the square of the distance.
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The distance between a charge and the source of an electric field changes from 3 mm to 6 mm.
As a result of the change, the electric potential energy of the charge is
divided by 6
divided by 2
multiplied by 2
multiplied by 6.
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Which changes in an electric motor will make the motor stronger? Check all that apply.
using a stronger permanent magnet
using a weaker permanent magnet
increasing current in the electromagnet
decreasing current in the electromagnet
increasing the distance between the magnets
decreasing the distance between the magnets
2.0 cm 2.0 cmExplanation / Answer
Answer) option )a) 0m
Reason : when the both waves interfere at the point x , destructive interference takes place Since both the waves are at same distance from x ,because of which amplitude becomes 0
Question 2) answer)When the current flows down the wire, the magnetic field flows in on the left side of the wire and out on the right side of the wire.
Reason : by using right hand thumb rule , When the current flows down the wire, the magnetic field flows in on the left side of the wire and out on the right side of the wire.
Question 5) correct statements are :
The gravitational force is inversely proportional to the square of the distance.
The electrical force is inversely proportional to the square of the distance
The gravitational force has an infinite reach.
The electrical force has an infinite reach
Reason : electric force (Fe) = k*q1*q2/d^2
Gravitational force Fg = G*m1*m2/d^2
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