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100
An Indy-500 race car's velocity increases from 4.0 m/s to 36 m/s over a 4.0 s interval. What is it’s average acceleration?
8 m/s/s
100
How much work is done on an object that has an initial kinetic energy of 15 J and a final kinetic energy of 25 J?
10 J
100
What do the magnetic field lines look like between two north poles of a magnet? Draw them.
See PowerPoint slide 1
100
If the period of a wave is 2.85 s. What is the frequency of the wave?
0.35 Hz
100
A 60 Ω resistor, a 30 Ω resistor, and a 20 Ω resistor are connected in parallel across a 90 V potential difference. Draw a circuit diagram for the above circuit. Include an ammeter and a voltmeter with your diagram.
See PowerPoint slide 3
200
A 60 Ω resistor, a 30 Ω resistor, and a 20 Ω resistor are connected in parallel across a 90 V potential difference. What is the equivalent resistance of the circuit?
10 ohms
200
If an object with a mass of 24.5 kg is dropped from a height of 15 m above the ground, what is the velocity of the object the instant before the object hits the ground?
17 m/s
200
There are two charges, one with a charge of 5x10^-5 C and the other with a charge of 1.25 x 10^-4 C, separated by a distance of 15 m. What is the electrostatic force between the two charges?
0.25 N repel
200
If the velocity of a wave is 23 m/s and the frequency of the wave is 84 Hz, what is the wavelength of the wave?
0.27 m
200
Classical mechanics describes light traveling as waves. Quantum mechanics brought a different description of light. What process shows that light may behave like a stream of particles?
the photoelectric effect
300
A 20 N stone rests on a table. What is the force the table exerts on the stone and in what direction does this force act?
196 N up
300
A hockey player makes a slap shot, exerting a force of 30 N on the hockey puck for 0.16 s. What impulse is given to the puck?
4.8 Ns
300
A test charge of 6.2 x 10^-7 C is placed in an electrical field with a force of 0.0225 N. What is the strength of the electrical field?
3.63 x 10^4 N/C
300
If light travels through water at an angle of 30 degrees into air, what is the angle of refraction through the air? n air = 1.00 n water = 1.33
41.7 degrees
300
Which of these has the greatest thermal energy? 1. A swimming pool filled with 3 x 10^4 kg of water at 24 degrees C OR 2. A coffee pot filled with 1.5 kg of water at 90 degrees C
1 - a swimming pool
400
A girl walks 323 m to the west, then 465 m south. How far is she from her starting point?
566 m southwest
400
A box weighing 625 N is lifted a distance of 35 m straight up by a rope. The job is done is 15 sec. How much power is exerted during the lift?
1458 W
400
An airplane has an impulse of 120,000 kg m/s. If it has a mass of 1,000 kg and started from rest, what is the final velocity of the plane?
120 m/s
400
Which way will the wire move in PowerPoint slide 2?
out of the page
400
An aluminum can is heated by a lighter. The specific heat capacity of aluminum is 899 J/kg•oC. How much energy is added to the 0.03 kg can if the temperature of the can rises from 25o C to 50o C?
674.3 J
500
A sound wave produced by a clock chime 515 m away from an observer is heard in 1.5 s. What is the speed of the sound through the air?
343 m/s
500
A 400 kg car driving crashes into a 900 kg truck which was traveling at 35 m/s. After the collision the two vehicles are stuck together and have a new momentum of 50,000 kg m/s. What was the initial velocity of the car?
46.25 m/s (use conservation of momentum)
500
If a person pushes a box 20 m with a constant force of 6 N in 300 s, how much power has this person exerted?
0.4 W
500
What are two ways you can increase the amount of current created by a magnet moving through a coil of wire?
Increase the number of coils/loops, move the magnet faster through the coils
500
What is the difference between nuclear fission and fusion?
Fission - large particle divides into two smaller particles Fusion - two smaller particles come together to form a larger particle In both fission and fusion, the mass of the starting materials is more than the ending material because some mass is converted into energy