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A skier is gliding along at 4.3m/s on horizontal, frictionless snow. He suddenly starts down a 10? incline. His speed at the bottom is 10m/s
What is the length of the incline?
How long does it take him to reach the bottom?
In a crash test, a 1100 kg car slams into a concrete wall at 17.1 m/s and comes to rest in 0.275 s. a)Find out the magnitude of the impulse delivered to the car.b) Find the average stopping force.
A student is reading a lecture written on a blackboard. The lenses in her eyes have a refractive power of 69.40 diopters, How far (in meters) is the blackboard from her eyes
A wall in a house contains a single window. The window consists of a single pane of glass whose area is 0.18 m2 and whose thickness is 2.3 mm. what is the percentage lost by the window
A single slit has aperture width 4.54 μm and lies 14.9 cm from a screen. If light of wavelength 420 nm falls on the slit, find the width of the central maximum in centimeters
A photoflash unit makes a very bright light for a very short time, Which is important: the intensity of the light, or the product of the intensity and the time of the flash
A 14 g bullet travelling at 247 m/s is fired into a 0.459 kg wooden block anchored to a 100 N/m spring. How far is a spring compressed to the nearest thousandth of meter.
The primary coil of a transformer has N1= 300 turns, and the secondary coil has N2= 1810 turns. find rms voltage is developed across the secondary coil?
The velocity of a plane relative to still air is 135 mr/hr. The pilot wants to fly straught north over the ground. What is the direction of the wind relative to the ground
A telescope has an objective with a refractive power of 1.00 diopters and an eyepiece with a refractive power of 300 diopters
A 1500 microfarad capacitor and a 5600 microfarad capacitor are connected in parallel across a 12.0 V potential difference. Determine the total energy stored in the capacitors
The coefficient of static friction between m1 and the horizontal surface is 0.60, and the coefficient of kinetic friction is 0.30. what will be the acceleration of the system
A charged sphere of radius 10 cm has a total charge of 5 C. Calculate the potential at the surface of the sphere
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