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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Harlow Shapley mapped the Milky Way using the period-luminosity relationship for RR Lyrae stars
Indicate whether the statement is true or false
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.
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