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Question: A wheel starts from rest and rotates about its axis with constant angular acceleration. After 7.4 seconds have elapsed, it has rotated through an angle of 23 radians. What is the angular velocity when t=7.4 seconds?
A 60-W incandescent bulb with a tungsten filament is connected to a 120-V power supply. the power dissipated by the cold bulb is
A roller-coaster car has a mass of 1170 kg when fully loaded with passengers. As the car passes over the top of a circular hill of radius 20 m, its speed is not changing.
A gardener pushes a box of tools across a driveway by applying a 22.5- N force that pushes downward at an angle of 23.1 o, How much work is done if the box moves 2.55 m in the horizontal direction
A thin rod of length 0.75m and mass 0.42kg is suspended freelyform one end. It is pulled to one side and then allowed to swinglike a pendulum, how far above that position the center of mass rises
A projectile is fired in such a way that its horizontal range is equal to 2 times its maximum height. What is the angle of projection
A 0.20 kg aluminium plate with an initial temperature of 20 degrees c slides down a 15.00m long surface that is inclined at 30 degrees to the horizontal.
A platinum resistance thermometer has resistances of 230.0 omegacap.gif when placed in a 0°C ice bath and 236.8 omegacap.gif, What is the melting point of this substance
When point charges q1=+8.4uC and q2 = +5.6uC are brought near each other , each experience a repulsive force of magnitude 0.66 N. Determine the distance between the charges.
A beam of light traveling in air strikes a very smooth water surface in a glass bowl at an angle of incidence of 35 degrees. Prove that the emergent beam is parallel to the incident beam
Calculate the magnitude of the electric field at one corner of a square 0.820m on a side if the other three corners are occupied by 6.03×10?6C charges
A 3440-kg spacecraft is in a circular orbit a distance1850 km above the surface of Mars. How much work must thespacecraft engines perform to move the spacecraft to a circularorbit that is 4360 km above the surface?
A spherical object has an outside diameter of 50.0cm. Its outer shell is composed of aluminum and is 0.800cm thick. Determine the object's average density
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