A child on a merry-go-round is moving with speed 4 m/s in a circle with radius 2 m. If the child's mass is 30 kg, what is the centripetal force?
240 N
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A 30.0 cm wrench is used to generate a torque at a bolt. A force of 50.0 N is applied at the end of the wrench at an angle of 70.0 degrees. The torque generated at the bolt is
A. 10.4 N•m. B. 14.1 N•m. C. 19.7 N•m. D. 21.5 N•m. E. 26.2 N•m.
What would probably be the most likely source of energy for life in Jovian atmospheres?
A) sunlight B) chemical reactions powered by lightning C) meteoroid impacts D) solar wind particles from the Sun
By how much does the current fall after the switch is closed in a series RC circuit when three time constants have elapsed?
A. 5.0% B. 38% C. 62% D. 95% E. 100% since after 2 time constants the current is 0
Sedimentary rocks provide clues about past geologic events and settings. A low energy, quiet environment such as a lagoon or lake bed provides the perfect setting for the formation of
A) sandstone and shale. B) shale and evaporites. C) arkose and dolomite. D) none of these