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A 50kg boy runs at 10.0 m/s crashes into a stationary box of equal mass. After the collision, the two move at 5.00. m/s . The impact time is 0.100s. What is the average force.
A parallel plate capacitor has a potential difference between the plates of 80 V. what is the electrical energy stored by this capacitor
Mary applies a force of 79N to push a box with an acceleration of 0.56 m/s. When she increases the pushing force to 90 N, What is the mass of the box
a 170 g uniform rod pivoted at one end.The other end is attached to a horizontal spring. What is the rod's oscillation period
Compute the change in entropy of 1 gram of water as it goes from solid ice at 0 celsius to water vapor at 100 Celsuis
Only a small part of an iceberg protrudes above the water, whilethe bulk lies below the surface. The density of ice is 917 kg/m^3and that of seawater is 1025 kg/m^3. Find the percentage of theiceberg’s volume that lies below the surface.
A car is traveling north at 17.7m/s. After 12s its velocity is 14.10m/s in the same direction. Find the magnitude and direction of the car's average acceleration.
A car is traveling at 56.0 km/h on a flat highway. If the coefficient of friction between road and tires on a rainy day is 0.100, what is the minimum distance in which the car will stop
The atomic planes in a crysral are spaced d = 0.50 nm apart. These planes are used in a diffraction experiment with X-rays with ? = 0.05 nm. What are the diffraction angles for the first three bright fringes
A pulsar is a rapidly rotating neutron star that emits a radio beam the way a lighthouse emits a light beam. We receive a radio pulse for each rotation of the star. The period T of rotation is found by measuring the time between pulses. The pulsar..
An electron gun sends electrons through a region with an electricfield of 1.5 104 N/C for a distance of 2.5cm. If the electrons start from rest, how fast are they moving after traversing the gun?
A woman of mass m = 50.9 kg sits on the left end of a seesaw-a plank of length L = 3.99 m, Find the normal force exerted by the pivot if the plank has a mass of mpl = 13.4 kg
A small glider and a big glider both start from rest and are pushed with the same constant force F along a horizontal, frictionless surface. After each glider has traveled a distance d, which of the following statements is rue ?
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