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A 1.50 kg snowball is fired from a cliff 12.5 m high. The snowball's velocity is 14.0 m/s, directed 41.0 degrees above the horizontal.
(a) How much work is done on the snowball by the gravitational force during its flight to the flat ground below the cliff?
(b) What is the change in the gravitational potential energy of the snowball-Earth system during the flight?
(c) If that gravitational potential energy is taken to be zero at the height of the cliff, what is its value when the snowball reaches the ground?
an organ pipe is 2.0cm long.Assume the pipe is cylindrical with one closed and one open end. if the frequency of the 3rd harmonic is 290Hz,then what is the speed of sound in the pipe
The nickel's image has1.8times the diameter of the nickel and is2.75cm from the lens. Determine the focal length of the lens.
A person pulls a toboggan for a distance of 39.7 m along the snow with a rope directed 33.0 ° above the snow. How much work is done on the toboggan by the tension force
A series RLC circuit consists of a 96.0 ? resistor, a 0.200Hinductor, and a 43.0 ?F capacitor. It is attached to a120 V/60 Hz power line. What is the average power loss
An object of size 7.0 cm is placed at 27 cm in front of a concave mirror of focal length 18 cm. Find the size and the nature of the image
The alarm at a fire station rings and a 79-kg fireman, starting from rest, slides down a pole to the floor below (a distance of 4.3 m). Just before landing, his speed is 1.2 m/s. What is the magnitude of the kinetic frictional force exerted on the fi..
You hang different masses M from the lower end of a vertical spring and measure the period T for each value of M. What is the mass of the spring
The star Sirius has a surface temperature of 9750 K and aradius 2.4 times larger than the Sun's. What is the ratio of the flux (energy per square meter persecond) emitted from the surface of Sirius to the flux emittedfrom the surface of the Sun?
The sun radiates energy at a rate of 3.86 ? 1026 W. Its radius is 7.0 ? 108 m. If the distance from the Earth to the sun is 1.5 ? 1011 m, what is the intensity of solar radiation at the top of the Earth's atmosphere?
Three moles of a monatomic ideal gas are heated at a constant volume of 1.16 m3. The amount of heat added is 3.33 x103 J. (a) What is the change in the temperature of the gas? (b) Find the change in itsinternal energy. (c) Determine the change inp..
A uniform plank of length 2m and mass 29kg is supported by three ropes, as indicated by the blue vectors. Find the tension in each rope when a 690N person is 0.500m from the left end.
The plate on the back of a certain computer scanner says that the unit draws 0.38A of current from a 120V , 60Hz line. Find the average square of the current
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