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Suppose you carry a bag of groceries weighing 100 N from your car to your kitchen, a distance of 61 m, without raising or lowering the bag.
(a) What is the work done by the force you exert on the bag?
Water at 22.0 °C is sprayed onto 0.203 kg of molten gold at 1063 °C (its melting point). What is the minimum mass of water that must be used
What is the wavelength of the electromagnetic waves used for cell phone communications in the 900-MHz band?
q1. a 18.0 kg loudspeaker is suspended 2.40m below the ceiling by two 4.10m long cables that angle outward at equal
The water system in a town is designed by a careless engineer. He places the new water tower at the top of an extremely tall hill, Calculate the minimum height of the water level in the tower
A proton exeriences a magnetic field B= 1.9 X 10^-4i^ T and electric field E = 3.2 j^ N/C, what is the net force on the proton
A racquet ball with mass m = 0.237 kg is moving toward the wall at v = 12 m/s and at an angle of ? = 30° with respect to the horizontal. What is the change in kinetic energy of the racquet ball
A transparent film has a thickness of 0.003250 cm, and a refractive index of 1.4000. Find the order of interference at theta=0 degrees
If you were to send a beam of laser light to a space station above an atmosphere and just above the horizon, would you aim the laser above, below or at the visible space station.
The mass of Jupiter is 300 times that of the earth, and the diameter is 11 times that of the earth, find the acceleration due to gravity on Jupiter's surface
Two police cars have identical sirens that produce a frequency of 560 Hz. Find the speed of the approaching police car
A photon of energy E collides with an electron at rest. Calculate the maximum amount of energy Ek that may be transfered to the electron. Make a graph of Ek versus E, labeling the scale in electron volts.
In this problem two moles of an ideal gas at 400 K expand quasi-statically and isothermally from an initial volume of 49.0 L to a final volume of 83.0 L. What is the entropy change of the gas
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