What is the temperature of the universe (as a whole) today?
A) 3K
B) 300K
C) 3000K
D) The universe cannot be said to have a single temperature.
A
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In 1975 the roof of Montreal's Velodrome, with a weight of 360 kN, was lifted by 10 cm so that it could be centered. How much work was done on the roof by the forces making the lift? In 1960 Mrs. Maxwell Rogers of Tampa, Florida, reportedly raised one end of a car that had fallen onto her son when a jack failed. If her panic lift effectively raised 4000 N (about 1/4 of the car's weight) by 5.0 cm, how much work did her force do on the car?
What will be an ideal response?
An alpha particle is another name for a(n)
a. electron. b. proton. c. neutron. d. helium nucleus. e. photon.
When we add a displacement vector to another displacement vector, the result is
a. a velocity. b. an acceleration. c. another displacement. d. a scalar.
What is the current through the 8.0-? resistor?
a.
1.0 A
b.
0.50 A
c.
1.5 A
d.
2.0 A