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The melting point of aluminum is 660 degrees C, the latent heat of fusion is 4.00 x 10^5 J/kg K. How much heat must be added to 500 g of aluminum at 27 degrees C to completely melt it?
Mary throws a ball to Suzy, who is standing 25 meters away. Suzy catches the ball from the same height at which it was thrown. calculate initial vertical velocity and Horizontal velocity
A man with mass m1 = 61.0 kg stands at the left end of a uniform boat with mass m2 = 169.0 kg and a length L = 2.7 m. At what location does the man end up
A compound microscope has an objective of focal length 0.3centimeter and an eyepiece of focal length 2.5centimeter. If an object is 3.4 millimeter from the objective, determine what is the magnification
A playground merry-go-round of radius R = 1.20 m has a moment of inertia I = 260 kg · m2 and is rotating at 8.0 rev/min about a frictionless vertical axle, What is the new angular speed of the merry-go-round
two identical objects are placed in a room at 24deg c. object 1 has a temperature of 95deg c and object 2 has a
q1. two large flat sheets of insulating material are parallel to each other one has a uniform surface charge density of
A heart defibrillator passes 11.0 A through a patient's torso for 5.00 ms in an attempt to restore normal beating, What was the path's resistance?
Johnie wants to go sailing, but their is no wind. Johnie mounts an Industrial Fan on his sail boat with a 40 N force. What is the speed of the boat
The image behind a convex mirror (radius of curvature =74 centimeter) is placed 4 centimeter behind the mirror. Find what is the magnification of the mirror
electronic devices are usually enclosed in metal boxes, onefunction of the box is to shield the inside components fromexternal electric fields. how does this shielding work
The orbital speed of a planet about its star is 2.8 104 m/s and its distance from the star is 1.6 1011 m. What is the magnitude of the force exerted by the star on the planet
cylinder made of red brass (K = 130 W/m degrees C) supports a hot reservoir at a temperature of 64o Celsius. Find the rate of heat flow through the cylinder
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