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An engine works at 23.0% efficiency. The engine raises a 5.00-kg crate from rest to a vertical height of 8.0 m, at which point the crate has a speed of 6.00 m/s. How much heat input is required for this engine?
Two points in a rectangular coordinate system have the coordinates (4.7, 2.5) and (-2.5, 4.7), Determine the distance between these points
If the backpack begins to slide when the spring ( = 150 ) stretches by 2.40 , what is the coefficient of static friction between backpack and table.
A rocket-powered hockey puck has a thrust of 2.0 N and a total mass of 1.0 kg. How far does the puck land from the base of the table
A laser peripheral iridotomy is a procedure for treating an eye condition known as narrow-angle glaucoma, in which pressure buildup in the eye can lead to loss of vision. How many photons does the laser deliver
A 6 in diameter concrete test cylinder is subjected to a compressive load P = 110 kips. determine the normal stress and shear stress on the failure plane at failure
question1a 240 33.0-cm-diameter turntable rotates on frictionless bearings at 55.0. a 25.0 block sits at center of the
A living specimen in equilibrium with the atmosphere contains one atom of 14C (half-life = 5 730 yr) for every 7.70 1011 stable carbon atoms. Find the number of carbon atoms in the sample
A geostationary communications satellite orbits the earth directly above the equator at an altitude of 35,800 km. Calculate the time it takes for a signal to travel from a point on the equator to the satellite
A man ties one end of a strong rope 7.64 m long to the bumper of his truck, 0.505 m from the ground, and the other end to a vertical tree trunk at a height of 3.90 m. Compute the magnitude of the torque on the tree
The laser used in cornea surgery to treat corneal disease is the excimer laser, which emits ultraviolet light with a wavelength of 193 nm in air. The index of refraction of the cornea is 1.376. What are the wavelength and frequency of the light in th..
The warm source of a Carnot cycle has a temperature off 100 C, while the cold source consists of melting ice. When the cycle operates for 1 hour it is observed that 1 metric ton of ice has melted. Calculate (a) the heat absorbed in the cycle from the..
A 25.0g sample of copper at 363 K is placed in 100g of water at 293 K. Calculate final temperature of the water
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