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A passenger on train traveling 90 km/h on a straight, level track notes that it takes another 180m long, constantly movingtrain 4.0s to pass by. What is the velocity of the passing train?
Throughout three hours one winter afternoon, when outside temperature was 9° C, a house heated by electricity was kept at 21° C with the expenditure of 46kwh (kilowatt•hours) of electric energy.
If the pressure inside an air tank is 10 atm when the balloon is at a temperature of 25 C, what will the pressure inside be when its temperature is lowered to 0 C? Assume the volume is fixed.
A 2100-? resistor and a 1.4-µF capacitor are connected in series across a generator (60.0 Hz, 120 V rms). Determine the average power delivered to the circuit
A 1040 kg car carrying four 80 kg people travels over a rough "washboard" dirt road with corrugations 2.0 m apart that causes the car to bounce on its spring suspension. The car bounces with maximum amplitude as its speed is 21 km/h. The car now stop..
A venturi meter is used to measure the flow speed of a fluid in a pipe. The meter is connected between two sections of the pipe, What is the rate of water flow in cubic meters per second
In a Compton scattering experiment, an x-ray photon scatters through an angle of 18.0° from a free electron that is initially at rest. Calculate the angle through which the electron scatters
Find out (a) the coefficient of kinetic friction between m2 and the incline, (b) the acceleration of each mass, and (C) the tension in the string.
In a vertical dive a perefrine falcon can accelerate at 0.6 times the free-fall acceleration (that is 0.6 g) in reaching a speed of about 100 m/s. what is the radius of the turn
An ice skater is traveling in a straight, horizontal line on the ice with a velocity of v=5.5m/s in the positive x direction. Write an expression for the normal force, F_n, that the ice pushes against both skates together
q.1. a child complains that her milk is too hot. it is indeed too hot at 90o c. her mother pours 70 g of cold milk at
The speed of an arrow fired from a compound bow is about 29 m/s. An archer sits astride his horse and launches an arrow into the air elevating the bow at an angle of 35 degrees above the horizontal, What is the arrow range
A block rests on a horizontal surface, and the coefficient of static friction between the block, Find the frequency at which the block begins to slide on the surface
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