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A 200 kilogram roller coaster car travels over the top of a 40-m high hill (Hill A) traveling at 10 meter per second. It then travels down before traveling back up the next hill (Hill B) which is 20 meter high. Let the gravitational potential energy be zero at the ground and assume that the work done by friction and air resistance on the car is negligible. Obtain the speed of the car at the top of the second hill.
You have two 120V light bulbs, one 25W and one 100W, that are normally connected in parallel with 120V across each. Your friend had what seemed like a good idea which was to connect them in series across a 240V power line. However, one of them burned..
A parallel-plate capacitor has square plates of edge length 2.4 cm and a plate spacing of 0.017 mm. If the gap between the plates is a vacuum
one way to keep the contents of a garage from becoming too cold on a night when a severe subfreezing temperature is
A tungsten wire has a radius of 0.070 mm and is heated from 20.0 to 1416 oC. The temperature coefficient of resistivity is ? = 4.5 x 10-3 (Co)-1, How long is the wire
a woman can read the large print in a newspaper only when it is at a distance of 64 cm or more from her eyes. a is she
When a car is traveling at 25 m/s on level ground, the stoppingdistance is found to be 22m. This distance is measured by pushinghard on the brakes so that the wheels skid on the pavement.
a hot air balloon is descending at a rate of 2.6 ms when a passenger drops a cell phone.a if the phone is 40 m above
You have a string with a mass of 14.1 g. You stretch the string with a force of 8.63 N, giving it a length of 1.93 m. What is the wavelength of the standing wave you create in the string
A catapult on a cliff launches a large round rock towards a ship on the ocean below. calculate the speed at which the rock is launched
A large aquarium has portholes of thin transparent plastic with a radius of curvature of 1.95 m and their convex sides facing into the water. If the tooth has an actual length of 5.00 cm, how long does it appear to the observers
question1analyse the crystal thickness pd df prf prp spl period and distance to reflector if a 3 cycle pulse emitted
At time t=0 a grinding wheel has an angular velocity of 26.0 rad/s. It has a constant angular acceleration of 29.0 rad/s^2 until a circuit breaker trips at time t = 2.50 s. From then on, the wheel turns during an angle of 440 rad as it coasts to a..
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