Current: When current is flowing in an ordinary metal wire, the magnitude of the average velocity of the electrons is closest to
A. 10 m/s.
B. the speed of light.
C. 1 mm/s.
D. 1 km/s.
E. 1 m/s.
Answer: C
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Power: Jill does twice as much work as Jack does and in half the time. Jill's power output is
A. the same as Jack's power output. B. one-fourth as much as Jack's power output. C. one-half as much as Jack's power output. D. twice Jack's power output. E. four times Jack's power output.
The surface of the neutron star RXJ2015 has a temperature of 10 million K. This neutron star emits radiation most strongly in
A) x-ray light. B) visible light. C) radio light. D) infrared light.
Complete and balance the equation: Mg + HC2H3O2 ? _____________________
Fill in the blank(s) with correct word
The linear momentum of a truck will be greater than that of a bus if
a. the truck's mass is larger than the bus's but its speed is the same b. the truck's speed is larger than the bus's but its mass is the same c. the truck's mass and speed are both larger than the bus's d. any of the above