The fact that a force is exerted on a current-carrying wire when in a magnetic field is employed in _______.
A. motors
B. electric meters
C. both of these
D. neither of these
Answer: C. both of these
Physics & Space Science
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The speed an object needs to move away from the gravitational pull of Earth is called
A. orbital velocity. B. random velocity. C. rotational velocity. D. escape velocity.
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Quarks are bound together in hadrons by
a. the strong force c. intermediate (or gauge) bosons b. the weak force d. the color force
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Greenhouse gases in our atmosphere trap just enough heat to keep the Earth's oceans liquid
Indicate whether the statement is true or false
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