Heat/Energy
How does heat flow?
From a warmer region to a cooler region
How do sound waves change as a car drives towards the person?
The frequency increases and the amplitude increases
I have a 2 amperes of current running through a wire. What is the voltage across the 7-ohm resistor?
14 V
How are speed and velocity different?
Velocity has direction and speed does not
If I have to lift a stack of bricks to the height of 20 ft, what is the best simple machine to use?
Pulley
What are the energy conversions in a hairdryer?
Electrical energy to mechanical or heat energy
When a wave hits a surface through which it CANNOT pass and then bounces back, it undergoes
Reflection
What happens to the current when the voltage increases?
Current also increases
Rushawn runs 90 meters in 15 seconds. What is his speed?
6 m/s2
Using a simple machine, a student is able to lift a 480N weight by applying only 50 N. What is the mechanical advantage of the simple machine?
9.6
What kind of heat transfer is direct contact with a solid substance?
Conduction
Light enters a different medium and bends
Refraction
What happens in a parallel circuit with three bulbs and one of the bulbs is removed?
Nothing happens. The other two light bulbs stay lit
If you take the 800lb elephant to a planet larger than earth, what can you tell me about its mass and weight?
Mass would stay the same and the weight would increase
Which newton's law states that for every action, there is an equal and opposite reaction?
Newton's third Law
What is the kinetic energy of an object with a mass of 5 kilograms traveling at a speed of 5 meters per second? Assume no other forces act upon the object.
62.5 J
Amplitude is related to what part of sound?
Volume
Name one disadvantage of a series circuit.
1) One pathway only for flow of electricity
2) When one light bulb goes out, all the other go out as well
3) When you add a light bulb, the other light bulbs get dimmer.
What does a straight line _________, represent on a motion graph?
The object is at rest
The material through which a wave can travel through is called
Medium
A student moved a book from a lower level of the shelf to a higher level of the shelf. What happened to the potential energy?
Potential energy increases as it moves higher off the ground
What is one explanation for how the visible spectrum is arranged? (Hint: think in terms of energy and wavelength)
In order from lowest energy and longest wavelength to highest energy and shortest wavelength
How can you increase the strength of an electromagnet?
1) Wrap more wires around the nail and increase the voltage.
If Amy pulls with a 10N force to the left and Sarah pulls the rope 35N to the right, what is the overall net force on the rope and in what direction will it go?
25 N to the right
Which kind of wave requires a medium to move?
Mechanical waves like sound waves