An unknown substance has a mass of 15 g and a volume of 4 cm3. Calculate the density of the unknown substance.

When the area over which pressure is applied is increased, a. the pressure decreases. b. the force on that area increases. c. the pressure increases. d. the pressure first increases and then decreases.

The force a skateboard exerts on you if your mass is 60kg and you push on the skateboard with a force of 60N

What is the speed of a wave with a wavelength of 0.60 m and frequency of 240 Hz

What is the difference between rotational motion and circular motion? what is the difference between rotational motion and circular motion?

Formed through longshore drift a. sea stack b. sandbar c. spit d. headland

Which of these events is an example of the Doppler shift? The amplitude of a wave on a string increases as the frequency decreases. The amplitude of sound from a tuning fork decreases due to damping.

One disadvantage of this type of power is that it still pollutes the air. biomass geothermal power hydropower solar power You want to create a new warming appliance that is safe.

A small rock remains at rest in outer space while an astronaut pushes horizontally on it with a force of 20 N. Which of the following must be true? A. There is another horizontal force acting on the rock. B.

If an igneous rock has very large crystals of minerals that you can see when looking at it, which type of igneous rock is it

You have a 60-foot roll of fencing and a large field. You want to make two paddocks by continuing the fencing down the middle of a rectangular enclosure. What are the dimensions of the largest such enclosure you can make?