If we imagine the history of the universe compressed into one year, dinosaurs became extinct
A) about 6 months ago.
B) about 3 weeks ago.
C) yesterday morning.
D) about an hour ago.
C
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What is the total number of individual atoms in a water molecule?
A) one B) two C) three D) four E) none
A helicopter stays aloft by pushing large quantities of air downward every second. What mass of air must be pushed downward at 35.0 m/s every second to keep a 1 500-kg helicopter aloft?
a. 42.9 kg b. 420 kg c. 430 kg d. 410 kg e. 415 kg
If R = 4.0 k?, C = 3.0 mF, ? = 15 V, Q = 12 mC, and I = 2.0 mA, what is the potential difference Vb ? Va?
a.
+3.0 V
b.
?19 V
c.
?3.0 V
d.
+27 V
e.
+21 V
Consider a situation where you exert a force F on a crate of mass m, moving it at a speed v a distance d across a floor in a time interval t. The potential energy of the crate is __________
Fill in the blank(s) with correct word