A system that has zero momentum must also have zero kinetic energy
Indicate whether the statement is true or false
FALSE
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The specific heat of ice is 2.100 kJ/kg ?C, the heat of fusion for ice at 0is 333.7 kJ/kg, the specific heat of water 4.186 kJ/kg
the heat of vaporization of water at 100.0
is 2,256 kJ/kg, and the specific heat of steam is 2.020 kJ/kg
What is the final equilibrium temperature when 20.00 grams of ice at -15.0
is mixed with 5.000 grams of steam at 120.0
src="https://sciemce.com/media/4/b9ad0217031f6f632.png" class="w-image" />?
A. 59.92
B. 56.03
C. 52.76
D. 49.34
E. 45.67
If you take two steps of different sizes, (a) can you end up at your starting point? More generally, (b) can two vectors with different magnitudes ever add to zero? (c) Can three or more?
A. (a) Yes, (b) No, (c) Yes B. (a) No, (b) No, (c) Yes C. (a) No, (b) Yes, (c) Yes
Suppose you slowly, and at constant speed, lift a book weighing 12 N from the floor to a shelf 2 m above the floor. Neglect air resistance. While you are lifting, the net force on the book is
A) less than 12 N, by an amount that depends on the speed of lifting. B) more than 12 N, by an amount that depends on the speed of lifting. C) 12 N directed upward. D) zero. E) 12 N directed downward.
What scientist discovered more elements than any other person?
a. Lavoisier b. Boyle c. Berzelius d. Davy