In a race, a car goes from 3 mph to 50 mph in a course of one hour. What's the acceleration?

What momentum does a 70 kg person running 10m/s (a fast sprint) have?

John is running down the street and hears dogs barking in the distance. How do the sound waves change as John approaches the barking dogs A The height of the sound waves decreases The height of the sound waves increases The pitch of the sound waves

A translucent material A. reflects all light. B. absorbs all light. C. scatters some light. D. transmits all light.

A 10-kg weight is suspended from the ceiling by a spring. The weight-spring system is at equilibrium with the bottom of the weight about 1 m above the floor. The spring is then stretched until the weight is just above the eggs.

A wave creates a strong undertow. what kind of wave is it? a. tsunami b. swell c. long shore d. deep water

A person walks up a stalled escalator in 25 s. When standing on the same escalator, now moving, she is carried up in 16 s. How much time in seconds would it take her to walk up the moving escalator?

Does the temperature increase during melting yes or no

Is this statement true or false? The next generation of nuclear power plants being built in California and South Africa are even safer and more efficient than previous generations of power plants.

Part C At what speed does the wreckage move if one car was driving north and one east? Express your answer to two significant figures and include the appropriate units. ! HA C ? Value Units Submit Request Answer Provide Feedback

Which person below is experiencing a delusion? A. Imani, who reads a lot and thinks she will go to an Ivy League school O B. Nia, who thinks that she is the daughter of the president and an extraterrestrial O C.