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If you know the temperature of a star how would you find its wavelength? Say the temperature of a star is 30000K what is its wavelength?
A force with a magnitude of 452N is used to bring an object with a mass of 56.0 kg moving at a velocity of 155m/s. How long will it take to bring the object to a full stop.
The second ball, after rising, falls and also strikes the ground below. If air resistance can be neglected and if your downward and upward initial speeds are the same, explain how will the speeds of the balls compare upon striking the ground?
An arrow is shot at an angle such that it's horizontal velocity is 40 m/s and it's vertical velocity is 20 m/s. Find the horizontal distance the arrow will travel before hitting the ground
To stretch a certain spring by 2.20 from its equilibrium position requires 7.00 of work. What is the force constant of this spring
the triceps muscle in the back of the upper arm extends the forearm. this muscle in a professional boxer exerts a force
A 75 kg person is standing in an elevator that is moving upwards at 0.5m/s and accelerating downwards at 0.2 m/s2. What is the normal force of the elevator floor acting on the person
A block of ice at 0°C whose mass initially is m = 48.4 kg slides along a horizontal surface, starting at a speed vo = 4.91 m/s, Compute the mass of ice melted as a result of the friction between the block and the surface
While Galileo did not invent the telescope, he was the first known person to use it astronomically, beginning around 1609. How long would this telescope be between the two lenses
a rocket of mass 4.44 times 105 kg is in flight near earths surface. its thrust is directed at an angle of 54.5deg
A cart with mass 230 g moving on a frictionless linear air track at an initial speed of 1.7 m/s undergoes an elastic collision with an initially stationary cart of unknown mass, What is the speed of the two-cart center of mass
A 45.0 kg girl is standing on a 136 kgplank. The plank, originally at rest, is free to slide on a frozenlake, which is a flat, frictionless surface. What is her velocity relative to the surface of ice
971-kg car starts from rest on a horizontal roadway and accelerates eastward for 5.00 s when it reaches a speed of 30.0 m/s. What is the average force exerted on the car
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