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Assume a cyclist rides a certain high-speed motorcycle. He reaches top speed and then coasts up a hill. the maximum height reached with the motorcyclist is 250m.if 255000J of kinetic energy is dissipated by friction, what was the initial speed of the motorcycle? The combined mass of the motorcycle and cyclist is 250kg
A 100-W electric-resistance heater inside the tank is energized for 10 minutes. Calculate the mass of CO2 in the tank and the temperature and pressure in the tank at the end of the 10 minutes period
A 60 cm long steel rod with a diameter of 4 cm is mated to a 40 cm long Cu rod with the same diameter. the unmated end of the steel rod( not at the interface) is connected to a 140 degrees C heat source, while the far end of the Cu( not at the int..
A laserpointer has a beam intensity of 55 W/m2 and a beam radius of 2.1 mm. what is the force on the car
Gasoline flows through a horizontal pipeline with a flow rate of 25 ft 3 / min. calculate the pressure in this pipe
Positive charges with magnitudes 3.50 mC and 6.75mC are located at the origin and at the point (10,0) metters on the x axis, respectively. What are the strength and direction of the field they generate at the point (0,10) on the y axis?
a solid conducting sphere of radius 2.00 cm has a charge of 8.60 microc. a conducting spherical shell of inner radius
A 0.596 kg metal cylinder is placed inside the top of a plastic tube, the lower end of which is sealed off by an adjustable plunger, what is the initial acceleration of the metal cylinder
A certain voltmeter draws 0.02mA for full-scale deflection at 50V. (a) What is the resistance of the voltmeter? (b) What is the resistance per volt?
A roller coaster car crosses the top of a circular loop-the-loop attwice the critical speed. What is the ratio of the normal force to the gravitational force?
a 28kg suitcase is being pulled with constant speed by a handle that is at an angle of 30circ above the horizontal. if
A meter stick moving in a direction parallel to its length appears to be only 40cm long to an observer. what is the meter stick's speed relative to the observer
At the end of an amusement park ride, it is desirable to bring a gon- dola to a stop without having the acceleration exceed 2 g. what is the maximum allowed braking force
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