You observe a rocket moving away from you. Compared to its length when it was at rest on the ground, you will measure its length to be
1.shorter.
2.longer.
3.the same.
1
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Most galaxies in the Local Group are:
A) dwarf spirals. B) small irregulars similar to the Magellanic Clouds. C) larger spirals than either the Milky Way or M-31 in Andromeda. D) dwarf ellipticals, similar to the companions of M-31. E) brown dwarfs, with even more dust than our own Galaxy.
A 3.00-kg stone is dropped from a 39.2 m high building. When the stone has fallen 19.6 m, the magnitude of the impulse the Earth has received from the gravitational force exerted by the stone is
a. 9.80 N s. b. 19.6 N s. c. 29.4 N s. d. 58.8 N s. e. 118 N s.
How is the greenhouse effect on Venus different to the same effect on Earth?
What will be an ideal response?
A Carnot cycle, operating as a heat engine, consists, in the order given, of
a. an isothermal expansion, an isothermal compression, an adiabatic expansion, and an adiabatic compression. b. an adiabatic expansion, an adiabatic compression, an isothermal expansion, and an isothermal compression. c. an isothermal expansion, an adiabatic compression, an isothermal compression, and an adiabatic expansion. d. an adiabatic compression, an isothermal compression, an isothermal expansion, and an adiabatic expansion. e. an isothermal expansion, an adiabatic expansion, an isothermal compression, and an adiabatic compression.