Unit 09 Mirrors
What type of mirror curves inward like the inside of a spoon?
Answer: Concave mirror
What is the distance from one crest to the next crest called?
Wavelength
What does voltage provide in a circuit?
The push that moves electric charge through the circuit.
What law explains the force between two charged objects?
Coulomb’s Law
What type of energy does an object have because of its motion?
Kinetic energy
What type of mirror curves outward like the outside of a spoon?
Convex mirror
What is the number of wave cycles per second called?
Frequency
What is the formula for Ohm’s Law?
V=IR
What is the formula for electric field strength?
E=F/q
What type of energy does an object have because of its height?
Gravitational potential energy
An object is placed beyond the center of curvature in front of a concave mirror. What type of image is formed?
Real, inverted, reduced, and between the focal point and center of curvature
A wave has a frequency of 6.0 Hz and a wavelength of 2.5 m. What is the wave speed?
15 m/s
Three resistors are connected in series: 2 Ω, 4 Ω, and 6 Ω. What is the equivalent resistance?
12 Ω
A charge experiences a force of 24 N in an electric field. If the charge is 3.0 C, what is the electric field strength?
8.0 N/C
A 5.0 kg object is lifted to a height of 4.0 m. Use g=10 m/s^2. What is its gravitational potential energy?
200 J
In a concave mirror, a light ray traveling parallel to the principal axis reflects through what point?
The focal point
What is the formula for wave speed?
v=fλ
A 12 V battery is connected to a 4 Ω resistor. What is the current?
3 A
What happens to the electric force between two charges if the distance between them increases?
The force decreases.
What is the formula for momentum?
p=mv
An object is placed between the focal point and a concave mirror. What type of image is formed?
Virtual, upright, enlarged, and behind the mirror
In a standing wave, what is the name of a point where the string does not move?
Node
In a series circuit, what happens to the total resistance when more resistors are added?
The total resistance increases.
Two charges are both positive. What type of force do they exert on each other?
Repulsive force
In an elastic collision between two identical billiard balls, one moving ball hits one ball at rest. What usually happens after the collision?
The moving ball stops, and the ball at rest moves forward with the original speed.