A ball is dropped from an upper-story dorm window. Neglecting air resistance, what is the speed of the ball when it has fallen 2.5 m?
7.0 m/s
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The lowest tone to resonate in an open pipe of length L is 400. Hz. What is the frequency of the lowest tone that will resonate in a closed pipe of length 2L?
A) 200. Hz B) 1.60 kHz C) 100. Hz D) 400. Hz E) 0.800 kHz
Pascal's Principle: A 13,000-N vehicle is to be lifted by a 25-cm diameter hydraulic piston. What force needs to be applied to a 5.0 cm diameter piston to accomplish this? Assume the pistons each have negligible weight.
A. 260 N B. 520 N C. 2600 N D. 5200 N
When an unstable nucleus decays by emitting an alpha particle, the atomic number Z of the nucleus
A) increases by 4. B) increases by 2. C) decreases by 2. D) decreases by 4. E) remains unchanged.
Could our Sun ever undergo a nova or a white dwarf supernova event? Why or why not?
What will be an ideal response?