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A 60-g ice cube at 0°C is placed in 727 g of water at 28°C. What is the final temperature of the mixture?
A man stands on a platform that is rotating (without friction) with an angular speed of 1.0 rev/s; his arms are outstretched, What is the resulting angular speed of the platform
Gamma rays of photon energy 0.458 MeV are directed onto an aluminum target and are scattered in various directions by loosely bound electrons there. find the photon energy of the rays scattered in this direction
A series ac circuit contains a 230? resistor, a 13.0mH inductor, a 2.50?F capacitor, and an ac power source of voltage amplitude 45.0Voperating at an angular frequency of 360rad/s. Find the average power delivered to the entire circuit
An aspiring physicist wants to build a scale model of a hydrogen atom for her science fair project. how big should she try to make the nucleus
A 60.0 g copper calorimeter cup contains 200.0 g of water at 22.0 Co. How much steam must be condensed into the water
John measured the thickness of a book using a measuring stick. Calculate the mean thickness of the book
Find out the gravitational potential energy
Two stationary point charges of 4 nC and 2 nC are separated by a distance of 60 {rm cm}. An electron is released from rest at a point midway between the charges and moves along the line connecting them. What is the electric potential energy of the..
A cub scout makes a simple microscope by placing two converging lenses of +18.0 D at opposite ends of a 27.9-cm-long tube. What is the tube length of the microscope
A set of crash tests consists of running a test car moving at a speed of 13.0 m/s (28.6 m/h) into a solid wall. Calculate the size of the average force which acts on the dummy during that time
A point source emits 86.9 W of sound isotropically. A small microphone intercepts the sound in an area of 0.231 cm2, calculate the power intercepted by the microphone
A student sits on a swivel seat. Initially the student is at rest, holding a spinning bicycle wheel that has an angular velocity of 10.2 rad/s (see figure below). The student turns the spinning wheel upside down, reversing the direction of its angula..
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