You can safely stand on the overhanging end of a heavy plank that rests on a table. How much overhang depends on your mass and the plank's mass
If you can stand on the end of a plank that overhangs the edge of the supporting table 1/4 its total length, how massive is the plank compared to your mass?
A) 1/2
B) the same
C) 1 and 1/2 times
D) twice
E) 4 times
Answer: B
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Scientists cannot agree on whether viruses are living or not because
A) they are much smaller than other simple living organisms B) they can reproduce but do not require any utilization of energy to do so C) they can only reproduce within a host cell and not independently D) under certain conditions they can reproduce, but they do not contain any DNA
Describe an order-of-magnitude estimate
What will be an ideal response?
The electric field between two charged plates is 7.2 kN/C. If the plates are separated by 3.0 mm, what is the potential difference between them?
A. Need more information B. 240 kV C. 220 V D. 22 V
Briefly summarize the stages of life for a high-mass star
What will be an ideal response?