When we say that jovian planets contain significant amounts of hydrogen compounds except, we mean all the following chemicals except
A) carbon dioxide.
B) water.
C) ammonia.
D) methane.
A) carbon dioxide.
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A pencil balanced on its tip such that it does not move
A) is in unstable equilibrium. B) is in stable equilibrium. C) has a net torque acting on it. D) has a net vertical force. E) has a zero moment of inertia.
Which of the following telescopes is best suited for studying the hottest intergalactic gas (10 million K) in a cluster of galaxies?
A) Very Large Array Radio Telescope B) Chandra X-ray Telescope C) Herschel Infrared Telescope D) Hubble Space Telescope (UV and optical and some infrared)
If the net force acting on an object is in the positive x-direction, the object moves only in the positive x-direction
1.True 2.False
The best way to reduce your radiation dose from a Co-60 gamma emitting source is to _______
a. reduce the temperature of the source b. move twice as far away c. spend half the time near the source d. double the thickness of wood between you and the source e. nonsense! You cannot change the potential dose