Daisy raises 10.Kg to a height of 2.5 meters in 2.0 seconds. (a) How much work did she do? (b) ...

Daisy raises 10.Kg to a height of 2.5 meters in 2.0 seconds.
 
  (a) How much work did she do?
  (b) How much power was expended?
  (c) If she raises it in 1.0 s rather than 2.0 s, how do the work and power change?

Question 2

The change of the internal energy of an ideal gas depends upon
 
  A) changing temperature.
  B) changing pressure.
  C) changing volume.
  D) changing pressure and volume together.

Question 3

Impacts of large asteroids on the Earth's surface generally result in
 
  A) localized destruction close to the impact area
  B) the destruction of most but not all life on Earth
  C) the formation of Moons
  D) total destruction of all life on Earth

Question 4

Rocks are found on the surface of another planet which appear to have once been transformed at high temperatures and pressures deep within the planet. Given this, they are most likely to be classified as
 
  A) igneous
  B) meteoritic
  C) sedimentary
  D) metamorphic