Mars and Mercury are similar in size, and Mercury is even denser. Why then is it Mars that has more atmosphere?
What will be an ideal response?
Its location is too close to the Sun; Mercury's gases boil away in the solar wind. Colder Mars has enough gravity to hang on to more, even though its water is no longer liquid today.
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Suppose you drop a 10-pound weight and a 5-pound weight on the Moon, both from the same height at the same time. What will happen?
A) Both will hit the ground at the same time. B) The 10-pound weight will hit the ground before the 5-pound weight. C) The 5-pound weight will hit the ground before the 10-pound weight. D) Both weights will float freely because everything is weightless on the Moon.
Which situation has more energy, a H nucleus, or a separated proton and neutron?
A) A H nucleus, because work is required to put it together beginning from a separated proton and neutron. B) A H nucleus, because work is required to pull a H nucleus apart. C) A separated proton and neutron has more energy, because work is required to pull a H nucleus apart. D) A separated proton and neutron, because work is required to put a H nucleus together. E) They both have the same energy, because energy is always conserved in any physical process.
An ideal transformer has 60 turns on its primary coil and 300 turns on its secondary coil. If 120 V at 2.0 A is applied to the primary, what voltage and current are present in the secondary?
What will be an ideal response?
______________ is the largest known asteroid
Fill in the blank(s) with correct word