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Problem: A person looking out the window of a stationary train notices that raindrops are falling vertically down at a speed of 6.97 m/s relative to the ground. When the train moves at a constant velocity, the raindrops make an angle of 25° when they move past the window.
Part A: How fast is the train moving?
I need help to determine how fast the train is moving.
An explosion breaks an object into two pieces, one of which has 2.40 times the mass of the other. If 7100 J were released in the explosion, how much kinetic energy did each piece obtain?
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An unknown substance has a mass of 0.125 kg and an initial temperature of97.5°C. The substance is then dropped into a calorimeter made of aluminum containing 0.285 kg of water initially at25.1°C. calculate the specific heat of the unknown substance
A student sitting on a frictionless rotating stool has rotational inertia 0.97 kg*m2 about a vertical axis through her center of mass when her arms are tight to her chest. what's her new rotational velocity
Light with a wavelength of 370 nanometer shines on a metal surface, which emits electrons. The stopping potential is measured to be 1.06 Volt, Determine the work function
finding the thermal conductivity (k) of a box with total surface area of 1.20 m and a wall thickness of 4cm is made of an insulating material. a 10 W electric heater inside the box maintain the inside temp. at 15 C above the outside temp.
A railroad car of mass 2.52 104 kg is moving with a speed of 4.06 m/s. It collides and couples with three other coupled railroad cars, How much mechanical energy is lost in the collision
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