In the context of Uranus's rings, the passage of the planet in front of a star is referred to as a(n) _____
A) ablation
B) blueshift
C) occultation
D) fasciculation
C
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The fundamental force that has the shortest range is
A. strong force. B. weak force. C. electromagnetic force. D. gravitational force.
Ice cream, when eaten, gives about 2100. Calories/kg to the body. On the other hand, the body must give back energy to warm it up to body temperature (37°C). Assuming ice cream has similar thermal properties to water:
(a) 1/2 kg produces how much energy? (b) 1/2 kg absorbs how much energy to reach 37°C? (c) What is the net gain or loss (eating 1/2 kg ice cream)?
A typical incandescent light bulb consumes 75 W of power and has a mass of 30 g
You want to save electrical energy by dropping the bulb from a height great enough so that the kinetic energy of the bulb when it reaches the floor will be the same as the energy it took to keep the bulb on for 1.0 hour. From what height should you drop the bulb, assuming no air resistance and constant g?
A ?- decay occurs in an unstable nucleus when
A) a proton is converted to an electron by the strong force. B) a proton is converted to a neutron by the strong force. C) a neutron is converted to a proton by the weak force. D) a neutron is converted to an alpha particle by the weak force. E) a neutron is converted to a beta particle by the weak force.