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Question: A 1200 kg cannon fires a 100.0 kg cannonball at 97 m/s. What is the recoil velocity of the cannon? Assume that frictional forces are negligible and the cannon is fired horizontally.
A sports car moving at constant speed travels 90 m in 4.9s. If it then brakes and comes to a stop in 4s, what is its acceleration? Express the answer in terms of g's, where g = 9.80 m/s2. (Take the positive direction to be direction of travel.)
A heat engine takes in 126 kJ of heat from a reservoir at 820 K and exhausts 88 kJ to a reservoir at 292 K. What is the efficiency of an ideal engine operating between the same two reservoirs
A sheet of glass (n = 1.50) is coated with a 500 nm thick layer of cubic zirconia (n = 2.18). How many phase changes do the reflected rays undergo
a wooden box on a wooden table is pulled at constant speed by a 10n force at a 30 degree angle. what is the mass of the
A light bulb marked "100 W [at] 120 V" is screwed into a socket at one end of a long extension cord in which each of the two conductors has resistance of 0.600 Ω
As measured in Earth's frame of reference, two planets are 4.25×10^5 km apart. How fast is the ship traveling
One common kind of computer keyboard is based on the idea of capacitance. Each key is mounted on one end of a plunger, find the change in capacitance that is detected by the computer
The Balmer series in atomic hydrogen is the series of wavelengths emitted by the electron when it makes a transition from an energy level with n > 2 to the n = 2 level, Find the four largest wavelengths in the Lyman series
Induced emf measurements can be used to measure the speed of a conducting fluid such as sea water. If a 20 cm inner diameter nonconducting pipe has sea water flowing through it at a flow rate of 10 gal/min and a uniform magnetic field of 0.05 T is ap..
A bottle with a volume of 194 U. S. fluid gallons is filled at the rate of 1.9 g/min. How long does the filling take
You travel from "point" Columbia to St. Louis in a car moving at a constant speed of 60 km/h. Then you travel back from St. Louis to Columbia the same distance moving at a constant speed of 120 km/h.
A block of mass 0.680 kg is pushed against a horizontal spring of negligible mass until the spring is compressed a distance x
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