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A laboratory vacuum pump can reduce the pressure to 1.0 × 10^-7 Pa. If the volume of the chamber is 0.500m^3 and the temperature is 27°C, how many molecules are left inside the chamber?
The leg and cast weigh 290 -N, with the center of mass as indicated by the blue arrow in the diagram. The counterbalance w2 weighs 120 N. Determine the weight w1 and angle α needed in order that there is no force exerted on the hip joint by the le..
Charge q1 = 5.47*10^-8 is placed at the origin. Charges q2 =-1.45*10^-8 C and q3 = 1.95*10^-8 C, Determine the direction of the net electrostatic force on charge q3
A person in an elevator is holding a 25 kg block by a cord rated to withstand a tension of 335 N. Starting from rest, the elevator begins to move upwards at a constant acceleration and the cord holding the block breaks. What was the least accelera..
Find out the height from which you would have to drop a ball so that it would have a speed of 9.7 m/s just before it hits the ground.
A 8.05 k? and a 7.05 k? resistor are connected in parallel. This combination is then connected in series with a 2.95 k, what is the maximum voltage that can be applied across the whole network
The wire is cut at point P. Will the potential difference between points A and B increase, decrease, or remain the same? Give reason for.
What is mass of the ice cube
How long would it take you to cover the 83 length of the walkway if, once you get on the walkway, you at once turns around and start walking in the opposite direction with a speed of 1.7 relative to the walkway.
A merry-go-round starts from rest and accelerates uniformly over 23.5 s to the final angular velocity of 6.55 rev/min.
protons are projected with an initial velocity v0 = 10410m/s into a region where a uniform electric field E = 710 N/C is present. The protons are to hit the target that lies a horizontal distance of 1.27mm from the point where protons are launched..
A 1.50 kg block of wood sits at the edge of a table, 0.782m above the floor. A 0.0105 kg bullet moving horizontally with a speed of 770m/s embeds itself within the block. What horizontal distance does the block cover before hitting the ground.
Two charged bodies exert the force of .145N on each other. If they are moved so that they are one fourth as far apart, what force is exerted.
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