Define 1 kg of mass as international standard

Energy that is the total of the kinetic energy and potential energy in an object or group of object is called what?

When we see a region of a planet that is not as heavily cratered as other regions, it means that

If Earth were completely blanketed with clouds and we couldn't see the sky, could we learn about the realm beyond the clouds? What forms of radiation might penetrate the clouds and reach the ground?

If two objects are moving at the same speed the object with more mass has more?

interval (from lowering the body to his feet taking off) lasts for 0.3 s and the mass of the player is 90 kg. Ignore air resistance. Part A Determine the force that the the player exerts on the surface when he jumps.

StarsA. begin as protostars, which fire up when they collapse and become denser and hotter. B. create elements by splitting the nuclei of small atoms into the nuclei of larger atoms. C. have unlimited amounts of fuel and therefore exist indefinitely.

The "atomic weight" of an atom reflects the average number of A) protons. B) neutrons. C) electrons. D) protons + neutrons. E) protons + neutrons + electrons.

How fast would a 2-kilogram object need to move to have the same kinetic energy as a 4-kilogram object moving at 8 meters per second?

The frequency of the George Washington Bridge is 2.05 Hz. What is its period?

Is speed and average speed the same thing?