Which of the following statements correctly describes the law of conservation of energy?
A) An object always has the same amount of energy.
B) Energy can change between many different forms, such as potential, kinetic, and thermal, but it is ultimately destroyed.
C) Energy can change between many different forms, such as potential, kinetic, and thermal, but the total quantity of energy in the universe never changes.
D) The fact that you can fuse hydrogen into helium to produce energy means that helium can be turned into hydrogen to produce energy.
E) It is not really possible for an object to gain or lose potential energy because energy cannot be destroyed.
C) Energy can change between many different forms, such as potential, kinetic, and thermal, but the total quantity of energy in the universe never changes.
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Intensity of Sound: A certain siren radiates sound uniformly in all directions. At a distance of 17 m from the siren, the intensity level is 49 db. How many watts of power does this siren put out? The threshold of human hearing is 1.0 × 10-12 W/m2.
Fill in the blank(s) with the appropriate word(s).
When Venus first formed it had large quantities of water vapor in its atmosphere while today only very low levels of water are present. Where did most of the water vapor go?
A) it was destroyed in the atmosphere by ultraviolet light from the Sun B) it became chemically incorporated into rocks in the crust C) it was blasted into space by impacts D) it escaped into space
You can see your image in a mirror because of diffuse reflection
Indicate whether the statement is true or false
Of the three types of nuclear decay, only __________ does not affect the atomic number of the nucleus
Fill in the blank(s) with correct word