If Mars is on your meridian at midnight, it is a great time to view Mars and we say that Mars is at
a)Perihelio
b)greatest elongation
c)conjuction
d)opposition
d)opposition
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In a thermally insulated kitchen, an ordinary refrigerator is turned on and its door is left open. The temperature of the room:
A. remains constant according to the first law of thermodynamics B. increases according to the first law of thermodynamics C. decreases according to the first law of thermodynamics D. remains constant according to the second law of thermodynamics E. increases according to the second law of thermodynamics
Escape speed from the Sun is
A) about the same as from Earth. B) very much greater than for Earth. C) indefinite.
The physicist responsible for explaining the wave nature of light was
A) Sir Isaac Newton. B) Michael Faraday. C) Heinrich Hertz. D) James Clerk Maxwell. E) Gustav Kirchhoff
Because of the equivalence of mass and energy, an electron and a positron, which are two massive particles, can annihilate when they come together to produce two photons, which have no mass
Indicate whether the statement is true or false