Sound waves cause molecules to vibrate and bump into one another. For sound to travel, there must be molecules which can be made to vibrate. The closer together the molecules are, the faster the sound is able to travel. This explains why
sound travels faster in steel than in water
sound travels faster in outer space than in air.
sound travels faster in air than in water
sound travels faster in water than in steel.
Which state of matter is the most dense for water?
gaseous water vapor
liquid water
solid ice
Water and ice are equally dense.
When white light is refracted in a prism, which wavelengths are bent the most?
the shortest ones, violet
the shortest ones, red
the longest ones, violet
the longest ones, red
Ross was riding his bike down a hill, and he ran straight into a mailbox. Identify the statement that most closely describes Ross’s motion immediately following his collision with the mailbox.
He is thrown forward over the handlebars.
He is thrown backwards off the bike.
He is thrown sideways off the bike.
He is thrown upward into the air
The diagram below represents two waves moving toward each other. They are moving at the same velocity, in the same medium. They have the same wavelength. What is the result of their interaction with particle P?
They are reflected by particle P
They are refracted by particle P
They cause particle P to move
They pass particle P, which remains unaffected.
A 200 N force, F1, and a 250 N, F2, force is applied to the same point at the same time to a large trunk on a frictionless level surface. Which diagram below shows the position of the forces that will give the greatest acceleration to the trunk?
Diagram A
Diagram B
Diagram C
Diagram D
Stacy adds 50 tiny Styrofoam balls to her 100-mL water sample. She places the sample on the hot plate and heats it until boiling. Describe the motion of the Styrofoam balls during this experiment.
The motion of the balls would increase as water temperature increased.
The motion of the balls would decrease as water temperature increased.
The balls would dissolve, so we couldn’t see them move.
The motion of the balls depends on the size of the sample, not temperature.
Which energy resource is available everywhere and is inexhaustible?
hydroelectric
natural gas
solar
coal
