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A train 350 m long is moving on a straight track with a speed of 81.0 km/h. The engineer applies the brakes at a crossing, and later the last car passes the crossing with a speed of 15.9 km/h. Assuming constant acceleration, determine how long the train blocked the crossing. Disregard the width of the crossing.
A typical coal-fired power plant burns 340 metric tons of coal every hour to generate 750MW of electricity. 1 metric ton= 1000 kg. What is the power plant's thermal efficiency
A laser pulse has an energy of 15 J and a beam radius of 2 mm. The pulse duration is 11 ns and the energy density is constant within the pulse. What is the spatial length of the pulse
A rigid tank contains 1.20 moles of an ideal gas. Determine the number of moles of gas that must be with Illustrate from the tank to lower the pressure of the gas from 24.2 atm to 5.30 atm. suppose the volume of the tank and the temperature of the..
The magnetic field perpendicular to a circular wire loop 11.2cm in diameter is changed from +0.50Tto -0.33T in 130ms, In what direction does the induced current flow?
A small object is placed to the left of a convex lens and on its optical axis. The object is 30 cm from the lens, which has a focal length of 48 cm. Describe the nature of this new image
A series RCL circuit driven at angular frequency %u03C9 = 505 rad/s has a capacitive reactance XC = 851 %u03A9, What is the total impedance
You are driving north on 107th Avenue at a speed of 32.6 mph. At what frequency do you year the siren
You are given a sample of metal and asked to determine its specific heat. You weigh the sample and find that its weight is 26.0N, What is the sample's specific heat
a pendulum with a pendulum length of 1.25 m undergoing SHM of mass 250g just released from an angel of 7 to the vertical. determine the period and frequency of the motion
The potential at location A is 478 V. A positively charged particle is released there from rest and arrives at location B with a speed vB, Find the potential at B
A 62- kg gymnast stretches a vertical spring by 0.52 m when she hangs from it. How much energy is stored in the spring
A 0.80m -long metal rod is dropped vertically onto a marble floor. When the rod strikes the floor, What is the speed of sound in the rod
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