In an isolated system of two bodies that exert gravitational forces on one another, the quantity (quantities) that remain(s) constant is(are)
a. the total energy of the system.
b. the total angular momentum of the system.
c. the angular positions of the two bodies.
d. all of the above. e. only (a) and (b) above.
E
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The physical properties of a regular copolymer are normally a weighted _____________of the physical properties of the component polymers.
Fill in the blank(s) with the appropriate word(s).
How does a rocket launch upwards? Choose the statement that best describes why a rocket goes up
A) By expelling gas downwards, the rocket is propelled upwards. B) By expelling gas, the rocket loses mass; because it is lighter, it rises up. C) By expelling gas downwards, which pushes against the ground, the rocket is propelled upwards.
In the scientific method, it is not necessary to test your theory
Indicate whether the statement is true or false
Consider the possibility that a neutron could decay into a proton and a pion. What, if any, of the following conservation laws would this process violate?
A) conservation of baryon number B) conservation of energy C) conservation of charge D) conservation of lepton number E) None of the above laws would be violated.