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From what height should a piece of ice be dropped so that three - quarter of it may melt? assume that 80 % of energy of fall is retained by ice and latent heat = 80 cal /g
The drawing shows two long, thin wires that carry currents in the positive z direction. Both wires are parallel to the z axis. The 50-A wire is in the x-z plane and is 5 m from the z axis. The 40-A wire is in the y-z plane and is 4 m from the z ax..
Three point charges, +q, +Q and -Q, are placed at the corners of anequilateral triangle and no other charged objects are nearby. What is the direction of the net force on charge +qdue to the other two charges?
block 1 has mass m1 = 470 g, block 2 has mass m2 = 510 g, and the pulley is on a frictionless horizontal axle and has radius R = 5.2 cm. What is the pulley's rotational inertia
A solid cylinder of radius 1.5 m has a uniform volume charge density of 15 C/m3. Find the magnitude of the electric field at 1.25 m from the axis of the cylinder. what will your gaussian surface be? Make a sketch of the solid cylinder and the gauss..
a boat is traveling with a velocity of 5 kmhr upstream. the river is flowing at a velocity of 2kmhr downstream. what is
A Carnot engine has an efficiency of 0.361, and the temperature of its cold reservoir is 406 K. (a) Determine the temperature of its hot reservoir. (b) If 5950 J of heat is rejected to the cold reservoir, what amount of heat is put into the engine..
Using a mixture of CO2, N2, and sometimes He, CO2 lasers emit a wavelength of 10.8μm. How many photons per second does a CO2 laser deliver to the tissue during its use in an operation
A baseball outfielder throws a 0.150 kg baseball at a speed of 39.0 m/s and an initial angle of 33.0°. What is the kinetic energy of the baseball at the highest point of its trajectory.
You gather up your things and quickly flee the hotel. As you make your way through the crowded streets you are forced to conclude that Miquel is supplying information to your would be killers, what is the horizontal speed of the boat after you jump..
A 100 kg person is 3/4 three fourths of the way up a 10 meter ladder that is resting against a smooth friction less wall. Compute the normal force of the wall on the ladder
An electric field of magnitude 190 V/m is directed perpendicular to a circular planar surface with radius 6.39 cm, determine the magnitude of the magnetic field at a radial distance 11.1 cm away from the center of the circular area
An object is placed 17.6 centimeter in front of a convex mirror, the image being 7.26 centimeter behind the mirror. Find how far in front of the mirror is second object placed
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