What does Newton's second law explain?

A. Why the speed of the ride changes

B. Why roller coasters have seat belts

C. Why roller coasters do not have brakes

D. Why roller coasters start with a big hill

You have two identical capacitors and an external potential source. a) Compare the total energy stored in the capacitors when they are connected to the applied potential in series and in parallel.

A football player runs 20 meters North of a football field, and then 15 meters East. The total motion lasted 15 seconds. What was his average speed

When water fills a submarine's flotation tanks, what happens to the submarine? The buoyant force is reduced. Its overall density decreases. Its overall density increases. Its overall density stays the same

Use an example to explain how the available tools can affect the precision of a measurement.

In addition to ash, what is produced when wood burns a. oxygen and water vapor b. oxygen and carbon dioxide c. oxygen. carbon dioxide and water vapor d. carbon dioxide and water vapor

Give the abbreviation for the unit which is equivalent to (kgm) / s2.

Which of these would be best explained by the Doppler effect? A) the change in frequency as you shorten a guitar string. B) the change in pitch heard as an ambulance approaches you. C) the change in volume as a train pulls away from the station.

What is the weight on earth of a girl with a mass of 38 kg?

50g of ice at 0°C is mixed with 50g of water at 80°C, what will be the final temperature of a mixture in degrees C?

If the Density of an object is 5.2 g/cm3, and its volume is 3.7 cm3, what is its mass