You can get a sunburn while under the "shade" of a beach umbrella due to
A) reflected sunlight from the sand.
B) refracted sunlight from the water.
C) light scattering in the air.
D) none of the above
Answer: A
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How does a particle’s relativistic kinetic energy K compare to its Newtonian kinetic energy when the particle’s speed 
?
A. 
B. 
C.
A television advertisement claiming that a product is light-years ahead of its time does not make sense because ________
A) light-years can only be used to talk about light B) it doesn't specify the number of light-years C) it uses "light-years" to talk about time, but a light-year is a unit of distance D) a light-year is an astronomically large unit, so a product could not possibly be so advanced
A race car moving quickly around a track collides with a mosquito, which splatters on the car's windshield. Which object experiences a greater magnitude acceleration?
1.Both experience the same acceleration. 2.the race car 3.the mosquito 4.One cannot tell, you need to know the speeds of the mosquito and the race car.
If a piece of iron and a cup of water at the same temperature are heated so the internal energy of each doubles
A) the water will have the higher temperature. B) the iron will have the higher temperature. C) both will have the same temperature. D) need more information