A 0.75-kg sphere is released from rest and is moving 5.0 m/s after falling 2.0 m in a viscous medium. What is the change in mechanical energy caused by the force the viscous medium exerts on the sphere during this descent?
a. ?6.1 J
b. ?4.6 J
c. ?5.3 J
d. ?6.8 J
e. ?2.7 J
c
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As the temperature of a wire increases, its ________ also increases.
Fill in the blank(s) with the appropriate word(s).
If all potatoes are selling at the same price per kilogram, a housewife who plans to peel the potatoes would get more potato for her money if she bought
1) small potatoes. 2) medium potatoes. 3) large potatoes. 4) no difference. This is because she 5) would get more potatoes per kilogram. 6) would get less potatoes per kilogram. 7) would get less peelings because of less surface area per pound. 8) buys weight, so any size per kilogram gives the same mass of potatoes.
Compared to smaller clouds with small droplets, a big cloud with large droplets
A) absorbs more light. B) is darker. C) is more likely to produce rain. D) all the above E) none of the above
State Kepler's First Law of Orbital Motion
What will be an ideal response?