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A heavy-duty stapling gun uses a 0.164 kg metal rod that rams against the staple to eject it. The rod is pushed by a stiff spring called a "ram spring" (k = 30071 N/m). The mass of this spring may be ignored. Squeezing the handle of the gun first compresses the ram spring by 3.20 10-2 m from its unstrained length and then releases it. Assuming that the ram spring is oriented vertically and is still compressed by 5.40 10-3 m when the downward-moving ram hits the staple, find the speed of the ram at the instant of contact.
m/s
5 mol of an ideal gas expands isothermally at 373 K to 1.2 its initial volume. Find the heat flow into the system. The universal gas constant is 8.31 J/K · mol
A 20-kg child swings back and forth on a swing such that her height h in m from the ground as a function of x is described by: h(x) = 0.5 + 0.45x2 for -1.2 m ? x ? 1.2 m, What is the maximum potential energy of the child
How much power does a refrigerator use if connected to a 120 volt line and is said to draw as much power as light bulb that uses 1.67 A when connected to the same voltage
A 9.58-m ladder with a mass of 22.2 kg lies flat on the ground. A painter grabs the top end of the ladder and pulls straight upward with a force of 264 N. What is the net torque acting on the ladder
A 0.29 micro farad capacitor is connected across an AC generator that produces a peak voltage of 10.4 V. What is the peak current through the capacitor
A 12.0 micro F capacitor is connected to a power supply that keeps a constant potential difference of 22.0V across the plates. By how much did the energy change during the insertion
A ping-pong ball of mass 4 gm and traveling with a velocity of 4 m/s collides with stationary tennis ball of mass 5 gm. Calculate the magnitude of the velocity of the tennis ball after the collision
An electron is observed traveling at a speed of 1.89 107 m/s parallel to an electric field of magnitude 10,660 N/C. How far will the electron travel before coming to a stop? (The mass of electron is 9.109 10-31 kg, and the charge on the electron is 1..
The intensity of a cylindrical laser beam is 0.800 {rm W}/ {rm m} ^ {2}. The cross-sectional area of the beam is 3.0 times 10^ {- 4} {rm m} ^ {2} and the intensity is uniform across the cross section of the beam.
A 75 kg solid sphere with a 19 cm radius is suspended by a vertical wire attached to the ceiling of a room. A torque of 0.35 N m is required to twist the sphere through an angle of 0.75 rad. What is the period of oscillation when the sphere is releas..
If she is served 200 of coffee at 85 in a well-insulated container, how much ice at 0 must she add to obtain a final temperature of 33.
Two cars leave a stoplight, one 0.5128 s before the other. The second car accelerates with twice the acceleration of the first. What is the ratio of their speeds at that instant
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