Where are the molecules of the medium farthest apart on a compressional wave?
The rarefactions
100
What is the unit of measure for power?
The Watt
100
Which of the following represents a SPEED: 4 meters, 4 meters/second, or 4 meters/second West
4 meters/second
100
When I push on a wall, the wall pushes back with equal force. This demonstrates Newton's ________ Law.
Third ("for every action, there is an equal and opposite reaction")
100
A knife is an example of which simple machine (used to seperate things)?
A wedge
200
What is it called when two waves combine to create one larger (or smaller) wave? (hint: a "wave behavior")
Interference
200
What is the unit of measure for work?
The Joule
200
How can you tell the difference between a speed and a velocity?
Velocity has a direction
200
If I kick two rocks with the same force, the one with less mass will accelerate faster. This describes Newton's ________ Law.
Second ("Force=Mass x Acceleration") F=MA, F=MA, F=MA, F=MA...
200
A leg or an arm is an example of which simple machine?
A lever
300
When you see yourself in a mirror you are actually seeing light rays __________ off the glass.
Reflecting
300
Anne-Marie throws her little sister 2 meters into a pool using 6 Newtons of force in 3 seconds. How much work did she do?
12 Joules (2m x 6N)
300
Mark walks 4 km east, then 6 km west. What is the Mark's displacement?
2 km West
300
An object in motion with balanced forces acting on it will stay in motion. This describes Newton's _______ Law.
First ("Object in motion stays in motion / object at rest stays at rest UNLESS acted upon by a force")
300
Fans blades rotate quickly because of the smaller rotating rod at their center (which is driven by an electric motor). What type of simple machine does this represent?
A wheel and axle
400
This causes sound waves to bend around corners.
Diffraction
400
Jeff takes 4 seconds to pull an alligator 2 meters through a river using 8 Joules of work. How much power did he use?
2 Watts (=8 Joules / 4 sec)
400
Jill takes 10 seconds to sprint to a wall 10 meters away and then back again. What is her final velocity?
Velocity = 0 (Because displacement =0)
400
A student throws a basketball and it hits a backboard, causing the ball it to change direction. Which of Newton's Laws is BEST represented in this situation?
Newton's First Law
400
The string on a window blind allows you to open and close the blind from an alternate direction, but you still have to use the same amount of force. What simple machine is the string connected to above the window that allows you to do this? (Both the machine and the type/category)
A fixed pulley
500
This is the matter that a wave moves through.
The medium
500
What is the mechanical advantage of a screwdriver that allows you to use 4 N of force to turn a screw with 12 N of force in 3 seconds?
MA = 3 (MA = Force out/Force in)
500
If an object is decelerating (slowing down), is the forces acting on it balanced or unbalanced?
Unbalanced
500
You are standing on the Science Hill Football field with a football. What TWO forces prevent you from throwing the ball into space?
Gravity and Friction (or air resistance)
500
A bicycle is a compound machine. Which two types of simple machines does a bicycle BEST represent?
A pulley (the chain) and a wheel and axle (the wheels/pedals)