Why doesn't all radiation directed at earth reach the surface?

If a car engine burns an equivalent of 20,000 joules of energy and attains a kinetic energy of 5,000 J, how much energy is dissipated in the form of heat?

a bottle rocket takes off with an acceleration of 34.5m/s^2. it fires until it reaches a height of 200m, then shuts off, and gravity takes over. what maximum height does it reach? (unit = m)

Just as a skydiver steps out of the helicopter with no forward velocity someone who's watching start stopwatch so the time is zero as a skydiver steps out of the plane what is the sky divers downward velocity at that entrance just before starting to

Two electrons exert a force of repulsion of 1.2 N on each other. How far apart are they? The elementary charge is 1.602 * 10-19 C and Coulomb's constant is 8.987 * 109 N · m2/C2. Answer in units of m.

On the moon, the gravitational acceleration is approximately one-sixth that on the surface of the earth. A 5-kg mass is "weighed" with a beam balance on the surface of the moon.

Why is carbon and nitrogen important?

Gizmo answer sled wars

3. What is the kinetic energy of a 1300 kg car moving at 26.3 m/s?

Kendall has empty graduated cylinder with markings and an identical graduated cylinder partway filled with water. She also has a balance and a marble. Which statement best describes what Kendall can do? A.

2. With regard to the pH scale, a solution with a pH A. higher than 7 is considered an acid. B. lower than 7 is considered basic. C. of 6 is considered neutral. D. close to 14 is considered a strong base.