Earth's magnetic field is a direct result of its rapid rotation and its molten metallic core
a. True
b. False
Indicate whether the statement is true or false
True
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Mass can be considered concentrated at the center of mass for rotational motion
Indicate whether the statement is true or false
Air with a density of 1.20 
flows through a 75.0 cm diameter pipe with a velocity of 2.00 m/s. What is the mass flow rate?
A. 0.95 kg/s B. 1.06 kg/s C. 1.20 kg/s D. 1.26 kg/s E. 1.48 kg/s
How have scientists mapped the surface features of Venus?
a. data received from rovers on the surface b. data received from multiple probes sent to the surface c. observations made from the Hubble Space Telescope d. radar imaging by the Magellan spacecraft e. UV imaging by the Odyssey spacecraft
Which of these undergoes circular motion?
a. A bullet shot from a gun. b. A top spinning on a table. c. A baseball hit by a bat. d. A satellite orbiting the Earth. e. An apple falling out of a tree.