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1. A scooter and a rider together have a mass of 275kg. If the scooter slows with an acceleration of -4.50 m/s²:a. What is the net force of the scooter and the rider together?b. Describe the direction of the force and the meaning of the negative sign in the acceleration value.
My moter has effciency of 80% with a flywheel attached to its shaft. The flywheel had a diamter of 2 ft and weighs 40 pounds. What is the input power in watts
The electric field midway between two equal but opposite point charges is 755 N/C, and the distance between the charges is 15.8 cm. What is the magnitude of the charge on each
An air wedge among two planar glass plates is illuminated by a432 nm monochromatic source at nearly normal incidence. A pattern of light and dark fringes is measured and observed at 700 fringes per centimetre. What is the angle among the two plates?
If the frequency of blue light is 6 x 10^14 cycles/second andits wavelength is 5 x 10^-7 m, find the speed of light by using dimensional analysis
Suppose a star with radius 8.39 multiply.gif 108 m has a peak wavelength of 686 nm in the spectrum of its emitted radiation. compute the surface temperature of the star
An object is located 8.00 cm from a converging lens that has a focal length of 10.0 cm. The height of the object is 0.67 cm. What is the height hi of the image
A medical defibrillator stores 950J of energy in a 100-muF capacitor. If the capacitor discharges 280 of its stored energy in 2.5 , what power is delivered during this time
an air conditioner operating between 93degf and 67degf is rated at 4000 btuh cooling capacity. its coefficient of
a racetrack has the shape of an inverted cone as the drawing shows. on this surface the cars race in circles that are
A potato cannon is used to launch a potato on a frozen lake. The mass of the cannon, Mc, is 10.kg, and the mass of the potato, Mp, is 0.850kg. find the direction and the magnitude of the cannon's velocity
A rocket is fired straight upward from rest with an acceleratrion of 5 m/s^2. It maintains acceleration until it is 1300 m above the ground, What is the Rocket's velocity, Find the total amound of time the rocket is in the air
An astronaut is rotated in a horizontal centrifuge at a radius of 7.5 m. (a) What is the astronaut's speed if the centripetal acceleration has a magnitude of 5.4g? (b) How many revolutions per minute are required to produce this acceleration.
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