Momentum & Collisions
What is the equation for momentum?
p = mv
What is the equation for the wavelength of a wave?
wavelength = wave speed/frequency
What is the equation for the speed of sound at room temperature?
vs = 331.4 + (0.6)Tc
An incoming ray of light has an angle of incidence of 39o. It strikes a surface and reflects completely at what angle?
39o
What is the equation for Ohm's Law?
V = I R
What is the velocity of an object with a mass of 15 kg and a momentum of 75 kg*m/s?
5 m/s
Two waves interact with each other and the resulting amplitude of the waves combines to form a smaller wave. This is ________ interference.
destructive
As temperature increases, the speed of sound __________ (increases/decreases).
increases
What is the equation for the intensity of light?
Intensity = Power/Area
Three 15 ohm resistors and wired in series. What is the equivalent resistance in the circuit?
45 ohms
A football player is running down the field. He is hit by another player attempting to tackle him, but bounces off and keeps running. What kind of collision is this?
elastic
In a standing wave, an area with no amplitude is referred to as a _______.
Node
In general, in which medium does sound travel fastest, solid, liquid or gas?
Solid
What happens to the intensity of light if the distance between the source and the observer of the light doubles?
The intensity decreases by a factor of 4.
Name one similarity and one difference of electric and gravitation fields.
Gravity = attractive only, smaller magnitude, longer ranger
Electricity = attract and repel, larger magnitude, shorter range
A 9.0 kg package explodes into two pieces, A and B. Piece A, with a mass of 4.0 kg, moves east at 10 m/s.
Determine the mass, speed and direction of piece B.
5 kg, -8 m/s, west
What is the equation for the period of a pendulum?
T = (2pi)(sqrt(L/g))
Determine the wavelength of a 575 Hz tone travelling in 27.7oC air.
0.605 m
What is the thin-lens (mirror) equation?
1/f = 1/p + 1/q
Three 15 ohm resistors are wired in series. If the voltage in the circuit is 9.0 V, what is the current in the circuit?
0.2 A
A 2000 kg car traveling at 8.0 m/s has a rear-end collision with a 1500 kg car stopped at a traffic light. The cars lock bumpers and skid off together.
What kind of collision is this?
What is the resulting velocity?
Inelastic, 4.6 m/s
What is the frequency of a pendulum bob with a length of 1.0 meter?
0.499 s
You're watching a baseball game from the bleachers in Wrigley field on a hot, 31oC day. The pitcher throws the ball and the batter hits it. If it takes 0.377 seconds for the sound of the bat hitting the ball to reach you, how far away from the batter are you?
132 meters
A 4.0-cm tall light bulb is placed a distance of 35.5 cm from a convex mirror having a focal length of -12.2 cm. Determine the image distance.
-9.08 cm
A 5 microcoulomb and 8 microcoulomb are separated by 0.519 meters. What is the magnitude of the electric force between them?
1.335 N