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a golf ball rolls of a cliff with an inital speed of 13.0 m/s. theball falls a vertical distance of 18.8 m into a lake below. Ittakes 1.45 s. What is the speed of the ball just before it hits the water?
A steel piano wire, of length 0.650 m and mass 5.80 g is stretched under a tension of 460.0 N. What is the speed of transverse waves on the wire
A hydrogen atom consists of a single proton and a single electron. Experimentally it is found that it takes 13.6eV of energy to strip the electron from the proton. calculate the size of the hydrogen atom
An object is placed to the left of a lens, and a real image is formed to the right of the lens. How far from the lens is the object
Suppose that you are traveling on board a spacecraft that is moving with respect to the earth at a speed of 0.970c. compute your breathing rate
A standard 1 kilogram weight is a cylinder 40.0 mm in height and 51.0 mm in diameter. What is the density of the material
tired of walking down the stairs a 75 kg engineering student designs an ingenious device for reaching his third floor
A Carnot engine does work of 150 J per cycle. The engine operates between two reservoirs at 20 degree C and 500 degree C. How much energy is lost per cycle in its exhaust
Two polarizers are oriented at 54? to one another. Unpolarized light falls on them. What fraction of the light is intensity is transmitted
A 7 kg penguin is sliding on his belly down a 23 degree icy slope. What is the magnitude of the normal force Determine magnitude and direction of the parallel acceleration
A projectile is fired in such a way that its horizontal range is equal to12.5times its maximum height. What is the angle of projection
A wheel turning at 80 rad/s is brought to a stop in 10 sec. what is its rate of angular acceleration
A dentist's mirror is placed 2.4 cm from a tooth. The enlarged image is located 6.4 cm behind the mirror. How is the image oriented relative to the object
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