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Julie has a mass 49kg What is her potential energy when standy on the 6m diving board? what is her kinetic energy just before she hits the water.
One end of a 29 cm long aluminum rod witha diameter of 2.0 cm is kept at 460°C,and the other is immersed in water at 22°C. Calculate the heat conduction rate along the rod
A 3.0m long rigid beam with a mass of 130kg is supported at each end. How much upward force does each support exert on the beam
An astronaut on a spaceship traveling at 0.75c relative to Earth measures his ship to be 29m long. On the ship, he eats his lunch in 23min. What length is the spaceship according to observers on Earth
A thief was trying to pull a 20 kg coffer (a coffer is a box usually used to hold valuables) along an essentially frictionless horizontal surface. What was the work done on the coffer by the rope
a 1.50 m section of it at one end is bent 90° in the negative z direction. Illustrate what is the total magnetic flux through the surface? Choose directions for the area vectors so that the flux through each surface is positive.
A light, flexible cable is wrapped around a solid cylinder with mass 3.5 kg and radius 0.8 meters.
q1. the brick wall of thermal conductivity 0.91 wmdegrees c of a building has dimensions 2.9 m by 6 m and is 18 cm
A 0.48-kg object connected to a light spring with a force constant of 23.6 N/m oscillates on a frictionless horizontal surface. The spring is compressed 4.0 cm and released from rest.
A three level laser has energy levels E 1=1.50 eV, E 2=3.50 eV, and E 3=5.50 eV. Level E 2 is the metastable state. What is the lasing wavelength
A device uses a Stirling cycle on 433 moles of a monatomic ideal gas between two reservoirs with temperatures of 416 K, How much energy does this device transfer into the hot reservoir
The potential difference between the plates of a parallel plate capacitor is 35 Volt and the electric field between the plates has strength of 750 V/m. compute the capacitance of this capacitor
find the final temperature when 1000 g of water at 20 celcius in a 125 g copper calorimeter is mixed with 50g of steam originally at 153 celcius.
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