The current produced by voltage in a circuit is impeded by
A) electric barriers.
B) closed switches.
C) electric resistance.
D) none of the above
Answer: C
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In straight-line motion, if a moving object speeds up, the direction of the acceleration is ______________ the direction of the velocity
Fill in the blank(s) with correct word
In what spectral range are black lights that cause materials to fluoresce in the visible?
A. x-ray B. infrared C. ultraviolet D. radio E. microwave
A Styrofoam cooler has a surface area of 2,700 cm2 and a wall thickness of 3.0 cm. Styrofoam has a coefficient of thermal conductivity of 0.01 W/m C. A 2.0 kg block of ice is placed inside the cooler that has a temperature inside of 2.0
If the heat of fusion for ice is 333.7 kJ/kg and the temperature outside is 35.0
then how long will the ice last?
A. 74 hours B. 62 hours C. 55 hours D. 42 hours E. 24 hours
The three allotropes of carbon are graphite, the fullerenes, and ______________
Fill in the blank(s) with correct word