With no air resistance, a projectile fired at 50° has the same range as if it were fired at
A) 40°.
B) 45°.
C) 55°.
D) 60°.
Answer is A) 40°.
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When ice water at 0°C is heated
A) thermal expansion occurs. B) thermal contraction occurs. C) both occur until 4°C is reached
You can raise the temperature of an object with
A. microwaves. B. infrared waves. C. ultraviolet rays. D. all of the above. E. only (a) and (b) above.
The current supplied by a battery as a function of time is I(t) = (0.88
A)e-t/(6.0 hr). What is the total number of electrons transported from the positive electrode to the negative electrode from the time the battery is first used until it is essentially dead? (e = 1.60 × 10-19 C) A) 1.2 × 1023 B) 4.4 × 1022 C) 5.3 × 1023 D) 3.3 × 1019
The Emergency Core Cooling System is used in the event of an accident to ________
a. stop the fission reactions b. reduce fuel rod temperatures c. provide backup power to control rods d. change the decay heat of the fuel pellets