How many matters can a sound wave travel through

A crash test dummy is inside a test car moving at 55 km/h. How fast is the dummy moving relative to the seat he is sitting in?

How does the number of moles of solute before a dilution compare with the number of moles of solute after the dilution?

How do the wavelengths of electromagnetic energy absorbed by materials on earth compare?

Ball is thrown upward from the ground with an initial speed of 25 m/s; at the same instant, another ball is dropped from a building 15 m high. after how long will the balls be at the same height?

Kate is working on a project in her tech education class. She plans to assemble a fan motor. Which form of energy does the motor convert most of its electric energy into? A. light energy B. motion energy C. sound energy D. thermal energy

Assuming one nerve impulse must end before another can begin, what is the maximum firing rate of a nerve in impulses per second? Assume that it takes a millisecond for an impulse to travel through a nerve cell.

Which of the following statements has NOT been indicated by research on food and hunger behaviors? A) Forcing children to eat specific foods often has a negative effect on food preference.

Loghan and Kyle want to see if the type of ice cream in the freezer affects how hard or soft it is. Each time they placed a new brand of ice cream in the freezer, they put it in a different place.

2. If you wanted to create a voltage source using magnetic induction, which device would you use? A. Battery B. Thermocouple C. Dry cell D. Generator

Which quantities decrease as the distance between a planet and the sun increase