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A laboratory technician drops a 0.0840-kg sample of unknown material, at a temperature of 100.0°C, into a calorimeter. The calorimeter can, initially at 23.0°C, is made of 0.150 kg of copper and contains 0.200 kg of water. The final temperature of the calorimeter can and contents is 26.5°C. Compute the specific heat capacity of the sample.(answer in J/kg·K)
A 282 kg log is pulled up a ramp by means of the rope that is parallel to the surface of the ramp. The ramp is inclined at 23.0° with respect to the horizontal. The coefficient of kinetic friction between the log and the ramp is 0.87, and the log has..
A freight company uses a compressed spring to shoot 1.7 kg packages up a 1m high frictionless ramp into a truck. The spring constant is 241 N/m and the spring is compressed 33 cm.
A skier is gliding along at 2.8m/s on horizontal, frictionless snow. He suddenly starts down a 10?incline. what is the distance of the incline
A box slides down a 40° ramp with an acceleration of 1.260 m/s2. Find out the coefficient of kinetic friction between box and ramp.
An energy storage system based on a flywheel (a rotating disk) can store a maximum of 4.0 MJ when the flywheel is rotating at 17,800 revolutions per minute
A 4.80-m clothesline is hung between two poles that are 4.76 m apart
In the x-y plane, a charge of -4.6 microcoulombs is on the x-axis at the point (-30cm,0cm), calculate the magnitude and direction of the resultant electric field E at the origin (0cm,0cm)
A net force of 20 N accelerates a 9-kg mass over a distance of 20 m. What is the increase in kinetic energy of the mass
A photon with energy E collides with a stationary mass m. What is the mass and speed of this particle
A child is pushing a merry-go-round. The angle through which the merry-go-round has turned varies with time according to ?(t)=?t+?t3, What is the initial value of the angular velocity
A raindrop of mass 3.27 10-5 kg falls vertically at constant speed under the influence of gravity and air resistance, What is the work done on the raindrop by air resistance
A pulsar is a rapidly rotating neutron star that continuously emits a beam of radio waves in a searchlight manner. Each time the pulsar makes one revolution, the rotation beam sweeps across the earth, & the earth receives a pulse of radio waves. ..
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