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Suppose a soccer player kicks the ball from a distance 31 m toward the goal. Find the initial speed of the ball if it just passes over the goal, 2.4 m above the ground, given the initial direction to be 44° above the horizontal.
two 4.0 cm times 4.0 cm electrodes spaced 2.0 mm apart form a parallel-plate capacitor. inside the capacitor the
A fuse in an electric circuit is a wire that is designed to melt, and thereby open the circuit, if the current exceeds apredetermined value. Suppose that the material to be used in a fusemelts when the current density rises to 410 A/cm2.
A clown at a birthday party has brought along a helium cylinder,with which he intends to fill balloons. What is the maximum number of balloons that can be filled
An automobile having a mass of 1000 kg is driven into a brickwall in a safety test. What was the speed of the car before impact
A ball is thrown upward from the edge of a building that is 100mt all. On its way back down, the ball just misses the building, falling to the ground below. The elapsed time between the throw andthe ball hitting the ground is 6.5 sec.
q1. a vessel whose walls are thermally insulated contains 2.00 of water and 0.550 of ice all at a temperature of 0.0.
If a metal target is bombarded with electrons which have been subjected to a potential difference of 44 kV, the minimum wavelength of the X-rays produced is about?
A 89 kg man lying on a surface of negligible friction shoves a 88 g stone away from himself, giving it a speed of 3.5 m/s. What speed does the man acquire as a result
An electron is located on a pinpoint having a diameter of 6.29 µm. What is the minimum uncertainty in the speed of the electron
A merry-go-round in the park can be considered a circular disk of mass 100 kilogram and a radius of 2.0 meter. Estimate the resulting angular velocity of the merry-go-round
A spaceship of proper length298m takes0.79µs to pass an Earth observer. find the speed of this spaceship as measured by the Earth observer
One piece of 50 g ice at 0C is added to m grams of water at 25C. The system is insulated from outside and the exchange of heat is limited to ice and water only. find the total change in entropy
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