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Q. An extreme skier, starting from rest, coasts down a mountain that makes an angle of 24.6 ° with the horizontal. The coefficient of kinetic friction between her skis and the snow is 0.119. She coasts for a distance of 17.8 m before coming to the edge of a cliff. Without slowing down, she skis off the cliff and lands downhill at a point whose vertical distance is 4.15 m below the edge. How fast is she going just before she lands?
Find the use of an NPN common emitter transistor, advantage of direct - coupled amplifier and bandwidth of an amplifier.
The pilot of an aircraft wishes to fly due west in a 30.50 km/h wind blowing toward the south. The speed of the aircraft in the absence of a wind is 190km/h. What should its speed relative to the ground be.
An airplane has a mass of 2.6 x10^6 kg, and the air flows past the lower surface of the wings at 95m/s. If the wings have a surface area of 1200m2, how fast should the air flow over the upper surface of the wing if the plane is to stay in the air?..
The average intensity of sunlight at the top of the earth's atmosphere is 1390 W/m2. What is the most energy that a 30 m multiplied by 55 m solar panel might collect in one hour in this sunlight.
How to find out an initial speed of the bullet
A gas expands while 502 J of energy is added to it as heat. The expanding gas does 422 J of work on its surroundings.
A lightweight string of length 60cm is attached to the ceiling at points separated by distance. Three objects of equal mass are hung from the string, separating the string into 4 equal segments of length L. If θ = 40, find the measure of angle φ a..
Billiard ball A of mass = 0.130 moving with speed = 2.80 strikes ball B, initially at rest, of mass = 0.150. Consequently of the collision, ball A is deflected off at an angle of 28.0 with the speed = 2.00.
What is frequency of the string
A certain medical machine emits x-rays with a minimum wavelength of 0.025 nm. One day, the machine has an electrical problem and the voltage applied to the x-ray tube decreases to 80 percent of its normal value. Now what is the minimum x-ray wavel..
A 1800 kg pile driver is used to drive a steel I-beam into the ground. The pile driver falls 6 m before coming into contact with the top of the beam, and it drives the beam 14.0 cm farther into the ground before coming to rest.
Find the pressure at pump discharge, rate of flow of a pump, energy required by the pump, and size of the pump motor.
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