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During gym class, a 50-kg teenager runs at 8.0 m/s along the floor toward a rope hanging 7.8 m from the ceiling. He grabs the end of the rope and swings upward. The teen rises to a maximum height H above the point where he grabbed the rope.
What is the tension in the rope at the moment he begins to swing upward?
An alpha particle (the nucleus of a helium atom, with charge +2e and a mass four times that of a proton), What is the speed of the antiproton when the particles are 1.1nm apart
A car is traveling at 50.0 mi/h on a horizontal highway, What is the stopping distance when the surface is dry and µs = 0.601
falls to the safety net while the other speeds away, to reach another swing at the same height at that of the swing they left. Illustrate what should be the distance (in m) between the two swings?
On an essentially frictionless, horizontal ice rink, a skater moving at 4.1 m/s encounters a rough patch that reduces her speed by 49% due to a friction force that is 26% of her weight. find the length of this rough patch
An object's temperature increases, and in so doing its radiation power increases by a factor of 2.00.find the ratio of the new temperature to the original temperature
Assuming that the bricks are lifted with constant speed, illustrate what is the minimum power the motor must produce?
An electron with 184eV of kinetic energy in free space passes over a finite potential well 72eV deep that stretches from x=0 to \(x = 0.5\) nm. What is the electron's wavelength in free space
An 19 ohm resistance is connected across a battery of emf 8 V with an internal resistance 1 ohm. Find the terminal voltage of the battery
The first telescope is 0.3m and has a focal ratio of f/8. The second telescope has a focal ratio of f/4 and is 30m in diameter. They each have an identical CCD camera whose pixels are 25 microns on a side.
The rate of rotation of the smooth-walled tub is chosen so that a small piece of cloth will lose contact with the tub when the cloth is at an angle of ? = 73.0° above the horizontal. If the radius of the tub is r = 0.455 m, what rate of revolution..
It is desired to build a heat pump that has an output temperature of 31 °C. Calculate the maximum coefficient of performance for the pump when the input source is ground water at 8.1 °C
two masses m1=2.0kg and m2=3.5kg are connected by a thin string running over a massless pulley. what is the acceleration of the masses
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