A roller coaster begins at the top of a hill. If it accelerates at the rate of 2 m/s2 and has a mass of 2000 kg, what net force is acting on it? (F=ma)

A. 0.001 N

B. 0.5 N

C. 4000 N

D. 1000 N

If circle a has a radius of 0.5 and circle b has a radius of 0.3, what is the difference in area between the two circles?

For this velocity-time graph, what is lthe average acceleration between 60 s and 120 s?

A gyroscope slows from an initial rate of 49.3 rad/s at a rate of 0.731 rad/s^2. (a) How long does it take (in s) to come to rest? (b) How many revolutions does it make before stopping?

A pipe open only at one end has a fundamental frequency of 266 Hz. A second pipe, initially identical to the first pipe, is shortened by cutting off a portion of the open end.

What is the frequency of a sound wave with a wavelength of 0.04 meter in air? What type of wave is this, transverse or longitudinal?

What happens to the volume of solids, liquids, and gases when they are heated. Devise your own chart for your answer.

Which chemical compounds absorb large amounts of the sun's energy in the atmosphere? Select one: a. Nitrogen compounds, water vapor, and carbon compounds b. Carbon dioxide, water vapor, and dust c. Methane, nitrogen compounds, and dust d.

As protostars continue to contract, their cores become hotter and more dense until what process begins ...

Emily jogs 3 laps at the track to warm up. She jogs at 5 mph. Then she runs 3 more laps at 7 mph. What is true about her average speed and her average velocity?

Which of the following elements are the most reactive? beryllium, calcium, magnesium, barium?