Which of the following waves can travel through a medium, but does not require the medium to propagate?

sound waves

ocean waves

light waves

seismic waves

What are two ways friction can be reduced and what is one way friction can slow down a roller coaster?

What is the velocity of a rocket that goes 700 km north in 25 seconds?

Plastic foam is about 0.10 times as dense as water. What weight of bricks could you stack on a 1m x 1m x 0.10m slab of foam, so that the slab of foam floats in the water, leaving the bricks dry?

A student sets up an experiment to determine the inertial mass of a cart. The student has access to the following measurement equipment: a spring scale, a meterstick, and a stopwatch.

Calculating heat gained or lost requires mass, specific heat, and a. change in heat. b. relative humidity. c. change in temperature. d. rate of temperature change.

How much force is needed to stretch a spring 1.2 m if the spring constant is 8.5 n/m? 7.1 n 7.3 n 9.7 n 10.2 n

What forces are equal and opposite sides

B. how does the separation between galaxies compare to the separation between stars? based on your answer, discuss the likelihood of galactic collisions in comparison to the likelihood of stellar collisions.

Period vs string length String length (cm) 100cm, 75cm, 50cm, 25cm Each one below matches the strength length above time 10 periods (s) - trial 1 time for 10 periods (s) - trial 2 time for 10 periods (s) - trial 3

How could you determine the instantaneous speed during a trip?