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A passenger in a train that moves horizontally looksoutside and sees a child hitting a ball straight up to a height of30 m.The child's coach clains that the ball left the child and aangle of 15 degree above the horizon. Find the speed of the train relative to the ground.
A space of 100 cm3 and one of 300 cm3 seperated by a capillary tube, in which a tap is arranged, connected. How big is the pressure in the related areas
A river 107.3 m wide flows toward the south at 31.0 m/min. A girl on the west bank wishes to reach the east bank in the least possible time. How far downstream does she travel
A car of mass 2000kg is lifted up a a distance of 30m by a crane in 1 min. A second crane does the same job in 2 min. Do the crane consume the same or diffrent amounts of fuels
The resistive-wire thermometer is then calibrated against a Hg thermometer. The resistance in terms of the temperature t on the Celsius scale can be optimally fitted by the expression R = R0(1 + alpha t + beta t2) where alpha = 3.80 Times 10-3 degree..
The rms voltage across a 0.012uF capacitor is 1.4V at a frequency of 58hz. What is the maximum current through the capacitor
A +10uC charge is 20cm away from a -40uC charge. Detrmine the field of intensity
A 10.0 kg block is to be projected across a rough horizontal floor by means of a compressed spring device. What is the work done by friction, in joules, as the block slides to a stop
A force P pulls on a crate of mass m that is in contact with a horizontal rough surface. Which statement best describes the motion of the crate
The plates of a cathode ray tube are parallel and are 5 mm apart. What is the acceleration of the electron
A hockey puck is hit on a frozen lake and starts moving with a speed of 13.4 m/s. Five seconds later, its speed is 5.40 m/s. What is its average acceleration
Batman (mass = 102 kg) jumps straight down from a bridge into a boat (mass = 550 kg) in which a criminal is fleeing. What is the velocity of the boat after Batman lands in it
q1. a car at the indianapolis-500 accelerates uniformly from the pit area going from rest to 325 kmh in a semicircular
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