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A coin is thrown vertically down into a well with an initial velocity of 2.5 m/s.
(a) If the coin hits the surface of the water 1.47 s later, what is the depth of the well?
(b) What is the velocity of the coin just before it hits the water?
Find the shear strain that results if a force of magnitude 8×10^5 is applied to the top square face of the plate, parallel to the side, and a force of equal magnitude is applied in the opposite direction to bottom face of the plate.
If a plaintiff voluntarily enters into or participates into a risk activity that results in injury, illustrate what is the most likely defence that he or she may use to a defendant's claim that the plaintiff supposed the risk?
Water drives a waterwheel (or turbine) of radius R = 3.0 m as shown in the figure. The water enters at a speed v1 = 6.5m/s, What is the torque the water applies to the waterwheel
A beam of light enters a cube of flint glass (n = 1.65) at a 24 degree angle from the normal. Calculate the exact angles the light travels at
According to Kepler's third law, the orbital period T of a planet is related to the radius R of its orbit by T2 R3. What is the planet's orbital period
What is the car's maximum speed on an incline of 1 in 20 (ie, if theta is the angle of the incline with the horizontal, sin = 1/20)? Illustrate what is its power output on a 1-in-10 incline if the car is traveling at 10 m/s?
A soccer ball of diameter 30 cm rolls without slipping at a linear speed of 2.7 m/s. Through how various revolutions has the soccer ball turned as it moves a linear distance of 16 m.
Two wires are identical, except that one is aluminium and one is gold. The aluminium wire has a resistance of 0.18. What is resistance of the gold wire.
A slide projector needs to create a 86 cm high image of a 2.0 cm tall slide, What focal length does the lens need and How far should you place the lens from the slide
Find the position of an object in front of a screen to obtain an image of size twice larger than its original size on the screen.
The cable pulls horizontally on the box, and a 50.30 bag of gravel rests on top of the box. The coefficients of friction between the box and roof are shown. The system is not moving. Find out the friction force on the bag of gravel.
A spotlight sends red light (wavelength = 694.3 nm) to the moon. At the surface of the moon, which is 3.77 multiply.gif 108 m away, Determine the diameter (not the radius) of the central bright spot on the moon
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