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A kilogram of water (c = 4.186 kJ/kg °C) is stirred using a 400 watt device for 5 minutes. At the end of this time the temperature of the water has increased by 15°C. How much heat was lost to the surroundings?
Illustrate what is the average emf that is induced in this coil if it is in a region where B=2.0 T upward, and the coil's plane is perpendicular to B?
A block of mass 4.6 kg slides 15 m from rest down an inclined plane making an angle of 28 o with the horizontal. what is the retarding force due to friction
Medical x rays are taken with electromagnetic waves having a wavelength around 0.104nm. What is the wave number of such waves
A nozzle of inner radius 1.05 mm is connected to a hose of inner radius 8.03 mm. The nozzle shoots out water moving at 25.5 m/s. At what speed is the water in the hose moving
The force on a string is 198 N and the string's linear mass is 1.9 kg/m. What is the speed of waves on the string
A particle starts at rest at point p and moves to point q with uniform acceleration, Find the distance between p and q. Also find the acceleration of the particle
A person walks first at a constant speed of 4.80 m/s along a straight line from point a to point b and then back along the line from b to a at a constant speed of 3.30 m/s. What is her average speed over the entire trip?
a ball is thrown upward from the roof of a building, passes the roof going down three seconds later, and hits the ground one second after that. how tall is the building? how fast did the ball strike the ground?
In attempting to pass the puck to a teammate, a hockey player gives it an initial speed of 2.47 m/s. However, this speed is inadequate to compensate for the kinetic friction between the puck and the ice.
A convex mirror with a radius of curvature of 32.0 cm forms a 1.20 cm tall image of a pencil at a distance of 13.6 cm behind the mirror. Calculate the object distance for the pencil and its height
What is the focal length of a meniscus lens that has a convex surface of radius 32 cm and a concave surface of radius -16 cm
The quantity of charge q (in coulombs) that has passed through a surface of area 1.90 cm2 varies with time according to the equation q = 8t3 + 8t + 6, What is the value of the current density
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