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a 2.50 kg firework shell is fired straight up from a mortar and reaches a height of 110 m. Neglecting air resistance, calculate the shell's velocity when it leaves the mortar.
The motar itself is a tube of 0.450 m long. Calculate the average acceleration of the shell in the tube as it goes from zero to the velocity found in (a). What is the average force on the shell in the mortar? express your answer in newtons and as a ratio to the weight of the shell
Find the wavelength of the scattered photon when the scattered electron has its maximum kinetic energy
By what percent must one increase the tension in a guitar string to change speed of waves on the string from 327 m/s to 376 m/s.
If one shines a laser with wavelength = 650 nm through a single slit of width a = 0.04 mm, How far apart are the minima
a rotating merry-go-round is essentially a disk with mass of 250 kg an radius of 2.5m, Determine the final angular speed of the merry-go-round/son combination
A proton is initially at rest at a point where the potential is 507V. Sometime later the proton is at a point where the potential is 187V. If no force other than the electrostatic force acts on the proton, what is its final kinetic energy.
High speed stroboscopic photographs show that the head of a 181 g golf club is traveling at 55.4 m/s, Find the speed of the golf ball just after impact
A model rocket is fired vertically from rest. It has a net acceleration of 15.0 m/s2. After 1.1 s, its fuel is exhausted and its only acceleration is that due to gravity. how high does the rocket travel
A converging lens has a focal length of f = 22.0 cm. An object is placed 41.0 cm from the lens. Find the size of the image in cm if the object has a height of 4 cm. express answer with one decimal place.
You close the top of your straw with your thumb and lift the straw out of your glass containing Coke. How large is the error (in per cent) if you neglect the air in the straw
A meter stick is pivoted at its 50-cm mark but does not balance because of non uniformities in its material that cause its center of gravity to be displaced from its geometrical center. Find the mass of the meter stick and its location of its cente..
drop a rock into a well. You hear the splash 2.40 s after you release the rock from rest. The speed of sound in air at the ambient temperature is 336 m/s. How far below the top of the well is the surface of the water?
6.63 mol of argon gas is admitted to an evacuated 158.85 cm3 container at 48.95oC. compute the final pressure
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