A sand mover at a quarry lifts 2,000 kg of sand per minute a vertical distance of 12 meters. The sand is initially at rest and is discharged at the top of the sand mover with speed 5 m/s into a loading chute
At what minimum rate must power be supplied to this machine? A) 524 w
B) 3.92 kw
C) 6.65 kw
D) 4.34 kw
E) 1.13 kw
D
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Except for hydrogen and most of the helium, all the elements have been formed through stellar nucleosynthesis
Indicate whether the statement is true or false
What is the temperature of 3.0 moles of gas at a pressure of 250 kPa held in a volume of 15 L?
A) 150 K B) 200 K C) 250 K D) 300 K E) 350 K
A(n) ______________ is an elementary particle with a charge of –1.6 × 10^-19 C
a. electron b. neutron c. proton d. atom
A proton is moving at a speed of 3.2 × 106 m/s at an angle of 80° to a uniform magnetic field of strength 1.5 × 10-4 T
What is the distance moved by the proton along the spiral path as it completes one revolution? (This distance is called the "pitch" of the helix.) A) 1370 m B) 1390 m C) 240 m D) 220 m E) cannot be determined