Electricity
If the distance between two charged particles is doubled then, according to Coulomb’s law, the new electrostatic force compared with the original electrostatic force will be
one-quarter as strong
A 1-meter-long pendulum has a bob with a mass of 1 kg. Suppose that the bob is now replaced with a different bob of mass 2 kg, how will the period of the pendulum change?
The frequency of an emitted photon is related to its
energy
Which lamp is the most efficient for emitting light?
LED
Will observers A and B agree on measurements of time if A moves at half the speed of light relative to B?
No, the would disagree completely
Electric potential energy is measured in joules. Electric potential (electric potential energy per charge) is measured in
volts
A 1-meter-long pendulum has a bob with a mass of 1 kg. Suppose that the bob is now tied to a different string so that the length of the pendulum is now 2 m. How will the period of the pendulum change?
increase
When the shadow of the moon falls on Earth we have a
solar eclipse
What type of emission is a high-speed electron
beta
Does time dilation mean that time really passes more slowly in moving systems or only that it seemsto pass more slowly?
Time really passes more slowly
In an electrically neutral atom and the number of protons in the nucleus is equal to the number of
electrons that surround the nucleus
The distance between adjacent peaks in the direction of travel for a transverse wave is its
wavelength
To say that rose petal are red is to say that they
reflect red
The strong force is a force in the
nucleus that holds nucleons together
Suppose that an observer standing on a planet sees a pair of lightning bolts simultaneously strike the front and rear ends of the compartment in a high-speed rocket ship. Will the lightning strikes be simultaneous to an observer in the middle of the compartment in the rocket ship?
No, they will be non-simultaneous
When you double the voltage across a simple (parallel or series) combination of resistors, you double the
current
In the evening, when air directly above a pond is cooler than air above, sound across a pond tends to bend
downward
A change in the speed of light when passing from one medium to another explains which of the following phenomena
refraction
Suppose the number of neutrons in a reactor that is starting up doubles each minute, reaching 1 billion neutrons in 10 minutes. When did the number of neutrons reach half a billion?
9 minutes
If you were moving in a spaceship at a high speed relative to Earth, would you notice a difference in your pulse rate or the pulse rate of people on Earth?
You would notice a difference in the pulse rate of people on Earth, but not in your own pulse rate
Ohm's law tells us that the amount of current produced in a circuit is directly proportional to what?
voltage
You watch a person chopping wood and note that after the last chop you hear it 1 second later. How far away is the chopper?
330m
For mixing pigments or dyes, the primary colors are
magenta, cyan and yellow
In either a fission event or a fusion event, a quantity that remains unchanged is
number of nucleons
If you drop a ball inside a spaceship at rest on a launching pad, you’ll see it accelerate to the floor. Far away from Earth, how else could you see the ball do the same?
Spaceship should accelerate at g.