How is the energy of coal released

The mass of car 2 is twice the mass of car 1. If both cars have the same velocity, how does the kinetic energy of car 2 compare to car 1?

A local ice hockey pond is at 4°C when the air temperature falls, causing the water temperature to drop to 0°C with 10.9 cm of ice forming at the surface at a temperature of 0°C.

If an object weighs 39.2 n on earth, what is its mass

New York's 300m high Citicorp tower oscillates in the wind with a period of 6.8s. Calculate the frequency of the vibration.

What i know about atoms

Identify the type of relationship that exists between density and temperature

You are standing on the sidewalk and see a bus drive by. What would be an ideal frame of reference? A bird flying overhead A jogger running along the sidewalk A car driving alongside the bus A tree across the street

One isotope of sodium has 11 protons and 7 neutrons. What is the mass number of this isotope?

A beverage can is thrown upward and then falls back down to the floor. As usual, a y axis extends upward (positive direction). Which of the following best describes the acceleration of the can during its free flight?

Which of the following devices can be used to measure force? A. Bathroom scale (b) spring scale c. Force sensor d. All of the above.