In a head-on automobile collision, a person's momentum could be reduced from 2000 kg m/s to zero in just 0.1 s. If this occurs, the average force exerted to stop the person is
A. 2,000 N.
B. 20,000 N.
C. 200 N.
D. This can't be answered without knowing the person's mass
Answer: B
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Based on everything we have learned about Venus and Mars, what is the most surprising aspect of Earth's climate history?
A) the fact that the temperature of our planet has remained relatively steady throughout our planet's history B) the fact that Earth apparently got a lot of atmospheric gas from outgassing by volcanoes C) the fact that Earth had enough water to form oceans D) the fact that Earth's climate can be affected by changes in its axis tilt
The weak magnetic fields around Europa and Ganymede were found during flybys of
A) Galileo. B) Stardust. C) Voyager 1. D) Cassini. E) Pioneer 10.
The molarity of a solution is the number of moles of solute per liter of ______________
Fill in the blank(s) with correct word
A refrigerator that would transfer heat from a cold body to a hotter body without work being done would violate ________ statement of the second law of thermodynamics.
What will be an ideal response?