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A string under a tension of 58.5 N is used to whirl a rock in a horizontal circle of radius 2.75 m at a speed of 20.5 m/s on a frictionless surface as shown in the figure below. As the string is pulled in, the speed of the rock increases. When the string is 1.00 m long and the speed of the rock is 51.5 m/s, the string breaks. What is the breaking strength, in newtons, of the string?
A constant horizontal force Fa pushes a 2 kg FedEx package across a frictionless floor on which an xy coordinate system has been drawn. It gives package's x and y velocity components versus time t. What is the magnitude of Fa.
Light is incident from one medium with an index of refraction of 2.29 at an angle of 29.12 degrees with respect to the normal to the surface. The light then passes into another medium with a refractive index 1.44. With what angle is the light refr..
What is water speed along the boat during the vertical cross
You want to photograph a circular diffraction pattern whose central maximum has a diameter of 1.1. How far behind the pinhole should you place the viewing screen
a space vehicle is moving at a speed of 0.85c with respect to an external observer. what is the speed of the project as seen by the external observer
A parallel-plate capacitor is made from two plates 12.5 on each side and 4.70 apart. What is the capacitance of this combination
Illustrate what is the speed of the three coupled cars after the collision? How much kinetic energy is lost in the collision?
How far must it now sail to reach its original destination. find the potential energy of the system.
A daredevil is shot out of a cannon at 43 degrees to the horizontal with an initial seed of 25m/s. A net is positioned at a horizontal distance of of 50m from the cannon from which it is shot. At what height above cannon should the net be placed i..
Water is contained in a closed, rigid, 0.25 m3 tank at an initial pressure of 5 bar and a quality of 60%. Determine the final mass of vapor in the tank
Assume that 36% of the body of a person floating in the Dead Sea will be above the water line, Find the density of the water in the Dead Sea
Heather and Jerry are standing on a bridge 51 above a river. Heather throws a rock straight down with a speed of 12. Jerry, at accurately the same instant of time, throws a rock straight up with the same speed. Ignore air resistance.
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