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A .81 kg chunk of ice has a temperature of -30 degrees C. The pressure is one atmosphere. Heat is added to the chunk until it is completely vaporized and the steam is at a temperature of 116.1 degrees C. How much heat was needed for this transformation?
Moving along a straight road, a car accelerates at a constant rate. It arrives at a road marker A (10 m from the initial point) in two seconds. Find the acceleration of the car
what is the equivalent resistance between points A and B?
A car of mass m = 1470 kg is pushed off a cliff of height h = 23 m. If the car lands a distance of 7 m from the base of the cliff, what was the kinetic energy of the car
The force component along the displacement varies with the magnitude of the displacement, Find the work done by the force in the interval
A circular plastic rod of radius R = 1.20 m has a positive charge = Q = 3.00×10-6 C uniformly distributed along one-quarter of its circumference and a negative charge of -4Q uniformly distributed along the rest of the circumference (see the figure..
A cart of mass 240 g is placed on a frictionless horizontal air track. A spring having a spring constant of 6.5 N/m is attached between the cart and the left end of the track. Find the period at which it oscillates
suppose you had two objects separated by 1000 meters. one had a mass of 50 kg and the other had a mass of 150 kg. what
Someone, flying a constant 200 km/h horizontally in a plane,wants 2 drop a bomb on a car traveling 150 km/h on the highway 88m below. at what angle w/ the horizontal should the car be in his sights when he drops the bomb? how do u solve this problem ..
The left face of a biconvex lens has a radius of curvatureof 11.5 cm, and the rightface has a radius of curvature of 20.0 cm. The index of refraction of glass is1.44.
if you blow across the top of an empty bottle to create a sound [fundamental frequency]with a wavelength lemda, what is the length of cavity inside the bottle
Oil is pumped at 25.0 m³/min into a tank 10.0 m above the ground. (1 L of oil has a mass of 0.68 kg.) What power, in kW, must be delivered by the pump
In a Young's double-slit experiment, two rays of monochromaticlight emerge from the slits and meet at a point on a distantscreen, as in the figure below. The point on the screen where thesetwo rays meet is the eighth-order bright fringe.
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