A tall crate and a short crate (both rectangular and of similar construction) of equal mass and equal base size are placed side by side on an incline, without touching each other. As the incline angle is increased, which crate will topple first?
1.the tall crate
2.the short crate
3.Both will topple at the same time.
4.It is impossible to tell, they will topple differently every time.
1
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Suppose that you measure the parallax angle for a particular star to be 0.1 arcseconds. What is the distance to this star? (Hint: A star at a distance of 3.26 light-years has a parallax angle of 1.0 arcseconds.)
A) 0.1 light-years B) 0.326 light-years C) 10 light-years D) 32.6 light-years E) 3.26 light-years
You stand on a scale to measure your weight. The reaction to the force the Earth exerts on you is
A. the force the Earth exerts on the scale. B. the force you exert on the Earth. C. the force the scale exerts on you. D. the force you exert on the scale. E. the force the scale exerts on the Earth.
One limit on the age of the Universe is that it must be older than the oldest stars.
Answer the following statement true (T) or false (F)
A gas is quickly compressed in an isolated environment. During the event, the gas exchanged no heat with its surroundings. This process is
A) isothermal. B) isometric. C) isobaric. D) adiabatic.