If the net force on a body is zero, the net torque on the body is
A. not necessarily zero.
B. always zero.
C. certainly not zero.
Answer: A
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The _____ is a geologically brief period about 540 million years ago during which fossil evidence indicates Earth life became complex and diverse
A) Cambrian explosion B) Paleozoic era C) Renaissance D) Ordovician
Explain what happens when the angular speed of the coil in an electric generator is increased
What will be an ideal response?
The nichrome heating element in an electric drier operates on 240 V and generates thermal energy at the rate of 2.0 kW. The heating element shorts out and, in repairing it, the repairman shortens the nichrome wire by 10%
(Assume the temperature is unchanged. In reality, the resistivity of the wire will depend on its temperature.) What effect will the repair have on the power dissipated in the heating element? A) The power is still 2.0 kW. B) The power increases to 2.2 kW. C) The power decreases to 1.8 kW. D) None of the given answers is correct.
Collisions in which kinetic energy is conserved are said to be ineleatic collisions
Indicate whether the statement is true or false