A cylinder, of radius 8.0 cm, rolls 20. cm in 5.0 s. Through what angular displacement does the cylinder move in this time?
What will be an ideal response?
143°
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A 3. kg ball of putty moving at 1 m/s collides and sticks to a 2 kg ball initially at rest. The putty and ball then move with a momentum of
A) 1 N-s. B) 2 N-s. C) 4 N-s. D) 3 N-s. E) 0 N-s.
Harlow Shapley mapped the Milky Way using the period-luminosity relationship for RR Lyrae stars
Indicate whether the statement is true or false
Six months of daylight at the South Pole begins when the Sun is at the
a. winter solstice. b. summer solstice. c. autumnal equinox. d. vernal equinox.
A storeroom has a volume of 30 m3 and is filled with air of an average molecular mass of 29 u. What is the mass of the air in the room at a pressure of 1.0 atm and temperature of 22°C? R = 0.082 L • atm/mol • K
a. 36 kg c. 72 kg b. 1240 kg d. 700 kg