You push on a block on frictionless ice with a force of 8 N, causing it to accelerate at 2 m/s2 . The mass of the block is __________
Fill in the blank(s) with correct word
4 kg
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When one of the authors was a teenager, the rate of rotation for popular music records on a record player was 45 RPM.
a. Express this rotational velocity in rev/s.
If the mass of the Sun were smaller by a factor of 1/3, how would the force between the Sun and the Earth change?
A) it would remain unchanged B) it would decrease by a factor of three C) it would triple D) it would decrease by a factor of nine E) it would be nine times more
In addition to Mars, which jovian moon shows some promise of life, with a surface not that different from the Arctic Ocean?
A) Titan B) Miranda C) Europa D) Io E) Triton
Light of intensity I0 and polarized horizontally passes through three polarizes. The first and third polarizing axes are horizontal, but the second one is oriented 20.0° to the horizontal. In terms of I0, what is the intensity of the light that passes through the set of polarizers?
A) 0.780I0 B) 0.180I0 C) 0.442I0 D) 0.883I0