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A crane is required to pull up a load of building supplies from the ground to a height of 90 m at a constant velocity. The tension in the cable is 2700 N and the building supplies reach the 90 m height in 2.5 minutes. Find the power output required of the motor that pulls the cable up.
When the skateboarder reaches the highest point, how far is this point horizontally from the end of ramp.
A certain red giant star has a luminosity of 100,000 times that of the Sun and is located 600 light-years from Earth. calculate the rate of interstellar extinction in the direction of the star
A magnetic field is perpendicular to a 0.0417 m x 0.0636 m rectangular coil of wire that has 108 turns, What is the magnitude of the change in the magnetic field
How much time is spent in pushing the mower
Calculate the speed of block at the instant the dielectric leaves the capacitor assuming it starts at rest and that the voltage across capacitor after the dielectric is removed is measured to be 200 V.
The cohesive energy of a sodium chloride crystal is 6eV per ion pair, Neglecting the energy of repulsion, estimate the interionic spacing
Estimate the position of C.G or fulcrum & the masses of persons on a 16 feett sea saw, under balanced condition.
In a double-slit interference experiment, the wavelength is 577 nm, the slit separation is 0.1 mm, What is the linear distance between adjacent maxima on the screen
A diverging lens with f = -25.5cm is placed 16.5cm behind a converging lens with f = 22.0cm. Where will an object at infinity be focused
Illustrate what is the average force exerted on the ball by the bat? Neglect the weight of the bat, since it is so much less than the force of the bat. Choose the direction of the incoming ball as the positive direction.
Over a time interval of 2.16 years, the velocity of a planet orbiting a distant star reverses direction, Find the total change in the planet's velocity in m/s
He milk is pumped (at a constant flow rate of 29532 L h-1) through a pipe that has an internal diameter of 65 mm. What is the milk velocity
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