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Steel ball of 300 g is attached to a 85cm fixed at one end and is released with cord horizontal. At bottom of its path it hits a 3.5 kg steel block at rest. Elastic and no friction. Find the hight the ball rebounds.
A 100 meter length of steel changes temperature by 30 C during the course of a day. If the coeffcient of thermal expansion of steel is 12 parts per million per C, what is the change in length of the steel
A t-rex dinosaur with an initial velocity of 10.0 m/s accelerates over a distance of 160m for 8.0 seconds. What is the final velocity of the t-rex
Physicists first attempted to understand the hydrogen atom by applying the laws of classical physics. Consider an electron of mass m and charge -e in a circular orbit of radius around a proton of charge +e. Use Newtonian physics to show that the tota..
The prong of a tuning fork moves back and forth when it is set intovibration. The distance the prong moves between its extremepositions is 2.29 mm. If the frequency ofthe tuning fork is 440.5 Hz, what are the maximum velocity and the maximum accel..
a drawbridge is set up as in this figure. the mass of the actual bridge is 1000 kg and it is 30 m long. the
The density of ice is 917 kg/m^3, and the density of sea water is 1025 kg/m^3. A swimming polar bear climbs onto a piece of floating ice that has a volume of 5.2m^3. What is the weight of the heaviest bear that the ice can support without sinking com..
Explain why you are safe and unaffected inside a car that is struck by lightning. Also explain why it might not be safe to step out of the car just after the lightning strike, with one foot in the car and one on the ground.
The distance between the objective and eyepiece of a telescope is 48cm. The focal length of the eyepiece is 3.0cm. What is the angular magnification of this telescope
An elevator weighing 2500 N ascends at a constant speed of 8.0 m/s. How much power must the motor supply to do this
Suppose that a simple pendulum consists of a small 61 g bob at the end of a cord of negligible mass. find the pendulums maximum kinetic energy
A block of mass 3.0 kg moves along a frictionless track which has a dip 0.7 m below the original level of the track and then a plateau 1.0 m above the original level of the track. What is the velocity at the hight point
A 2.5-kg block is hanging stationary from the end of a vertical spring that is attached to the ceiling. The elastic potential energy of the spring/mass system is 2.6 J. Determine is the elastic potential energy of the system when the 2.5-kg block is ..
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