A topic that most underlies electrical studies and all of physics is
A) Newton's laws of motion.
B) the conservation of momentum.
C) the conservation of energy.
Answer: C
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A sand mover at a quarry lifts 2,000 kg of sand per minute a vertical distance of 12 m. The sand is initially at rest and is discharged at the top of the sand mover with speed 5.0 m/s into a loading chute
What minimum power must be supplied to this machine? A) 6.7 kW B) 4.3 kW C) 3.9 kW D) 1.1 kW E) 520 W
The best places for life to have formed on Earth are believed to have been
a. near the south pole in places where water is frozen solid as ice. b. on the continent of Africa in the areas with no water. c. in liquid water, probably in the oceans or pools of water.
Copernicus was the first person to suggest a Sun-centered solar system.
What will be an ideal response?
Motion in a circle at constant speed is motion with constant acceleration
a. True b. False Indicate whether the statement is true or false