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A man moves the 10-g object shown in a vertical plane from positionX to position Y along a circular track of radius 20 m. The process takes 0.75 min. The workdone by the man is about:
A. 1 JB. 2 JC. 4 JD. 6 JE. 12 J
A 3kg particle has position as a function of time given by (-3,+1 m/s*t)x +(4m+ m/s t)y -(3 m/s* t)z What is the particle's angular momentum about the origin at t=5s
An unstable particle produced in a high-energy collision is measured to have an energy of 483 MeV and an uncertainty in energy of 84 keV. Use the Heisenberg uncertainty principle to estimate the lifetime of this particle. the answer is in seconds
At 12 breaths/min, on a dry day when the inhaled air has almost no water content, what is the body's rate of energy loss (in J/s) due to exhaled water
In a pool game, the cue ball, which has an initial speed of5.0m/s, make an elastic collision with the eight ball, which is initially at rest. Find the direction of motion of the cue ball after the collision
suppose tarzan leaps from the top of a 60-m tall building. if his initial speed is 24 ms and at an angle of 23 degrees
question all our household circuits are wired in parallel. below is an example of a simple household circuit with 3
As a spacecraft approaches a planet, the rocket engines on it are fired (turned on) to slow it down so it will go into orbit around the planet. compute how long (in minutes) must the engines be fired
What is the magnitude of the positive and negative charge? Two conducting spheres have identical radii. Initially they have charges of opposite sign and unequal magnitudes with the magnitude of the positive charge larger than the magnitude of the ..
the plane of a rectangular coil 4.0 cm by 7.0 cm is perpendicular to the direction of a magnetic field . if the coil
Unpolarized light of intensity I_0 is incident on a stack of 7 polarizing filters, each with its axis rotated 15 (degrees) cw with respect to the previous filter. What light intensity emerges from the last filter
A closed ended manometer is used to measure the pressure in a tank of gas. The working fluid for the manometer has a specific gravity of 1.47. what is the gauge pressure (in Pa) in the tank
The electric field strength is 2.40 x 10^4 N/C inside a parallel-plate capacitor with a 1.40 mm spacing, What is the electron's speed when it reaches the positive plate
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