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A child is playing by jumping on a bathroom scale. The mass of the child is 31 kg and when he stands on a bathroom scale, the spring inside the scale compresses 0.46 mm. Spring constant is 6.6e5. If the scale will be damaged if the force exceeds 38000 N, what is the maximum height the child can jump on the scale so the scale will not be damaged?
A 10 g bullet traveling at 430m/s strikes a 11kg , 1.1-m-wide door at the edge opposite the hinge. What is the angular velocity of the door just after impact
Two 10.0 cm diameter electrodes 0.52 cm apart form a parallel-plate capacitor. What is the potential difference between the electrodes
If his arms are capable of exerting a force of 1400 on the vine, what is the maximum speed he can tolerate at the lowest point of his swing? His mass is 82, and the vine is 6.00 long.
A 270 ball and a 520 ball are linked by a 50.0-cm-long massless, rigid rod. The structure rotates about its center of mass at 120 rpm. What is its rotational kinetic energy.
An infinite plane current sheet coincides with the xy plane. The surface current density is K'=K' y-hat where K'=const, Find the force per unit length on the wire
What is the electric field strength between the disks. What is the speed of the box at the end of the 5.7-s interval.
One liter of water is 41C is used to make iced tea. How much ice at 0 C must be added to lower the temperature of the tea to 17C? The specific heat of water is 1 cal/g C and latent heat of ice is 79.7 cal/g. Reply in units of g.
A 7.28-%u03A9 resistor is connected across a 9.00-V battery. The voltage between the terminals of the battery is observed to be only 7.27 V. obtain the internal resistance of the battery
Object 1 has a mass m1 and a velocity 1 = (2.87 m/s). Object 2 has a mass m2 and a velocity 2 = (3.01 m/s). The total momentum of these two objects has a magnitude of 18.0 kg • m/s and points in a direction 66.5° above the positive x-axis. Find out m..
Atomic physicists usually ignore the effect of gravity within an atom. To see why, we may calculate and compare the magnitude of the ratio of the electrical force, What is the magnitude of the electrical force
You're a marine biologist concerned with the effects of sonic booms on plankton, and you need to estimate the altitude of a supersonic aircraft flying directly over you at 1.1 times the speed of sound
The 2000 kg cable car descends a 200-m-high hill. In addition to its brakes, the cable car controls its speed by pulling an 1800 kg counterweight up the other side of the hill. find the runaway car's speed at the bottom of the hill
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