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An iron vat is 17m long at room temperature (20°C). How much longer is it when it contains boiling water at 1 atm pressure?
A particle with a mass of 3.65×10?24 kg and a charge of 6.40×10?19 C starts at rest and is accelerated for a distance of 0.104 m through a uniform electric field having strength E = 7.25×104 N/C
Cliff and Will are carrying a uniform 2.0m board of mass 74kg. Will is supporting the board at the end while cliff is 0.6m from the other end, Find the normal forces exerted by Cliff and Will
a 100N force acts for 0.05s on a .10kg ball with an initial velocity of -20m/s, What is the final momentum of the ball
A 105 kg fullback is running at 4.8 m/s to the east and is stopped in 0.75 s by a head-on tackle by a tackler running due west. Calculate the average force exerted on the tackler
A hollow, spherical shell with mass 2.40 kg rolls without slipping down a slope angled at 39.0 degrees. Find the friction force
an air conditioner operates on 800w of power and has a performance coefficient of 2.80 with a room temperature of 22.0
A spring with a spring constant k of 18 N/m is stretched a distance of 12 cm (0.12 m) from its original unstretched position. What is the increase in potential energy of the spring?
An object is moving in simple harmonic motion with amplitude 0.28 m and total energy 2.5 J. What is the total energy of the system now
A chair of weight 135 Newton lies atop a horizontal floor; the floor is not frictionless. find the magnitude of the normal force that the floor exerts on the chair
A billiard ball is moving in the x direction at 30.0 cm/s and strikes another billiard ball moving in the y direction at 40.0 cm/s. As a result of the collision, the second ball moves at 50.0 cm/s, and the first ball stops. In what final direction do..
Two small plastic balls hang from threads of negligible mass. Each ball has a mass of 0.19 g and a charge of magnitude q. The balls are attracted to each other, and the threads attached to the balls make an angle of 20.0° with the vertical, as sho..
A 4kg cart is initially moving at 3m/s on a frictionless track. It then hits an incline and stops 2m later. what is the net work done on the cart
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