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In order to determine a newly developed material's specific heat conduct, material scientists conduct an experiment. First, they place a chunk of the object (a mass of 100 grams) into boiling water until it's in thermodynamic equilibrium with the boiling water. Next, the object is taken from the biling water and dropped into a perfectly insulated aluminum container of 300 grams that already contains 100 grams of water initially, and the water and aluminum container have a temperature of 25 degrees Celsius. If the final temperature after the object is added rises to 50 degrees Celsius, what is the specific heat of the unknown?
assuming the weight is evenly distributed.On a hot day in Las Vegas, an oil trucker loaded 37000 L of fuel. He encountered cold weather on the way to Utah, where the temperature was 23K lower than Las Vegas.
Assume the charge on black hole is 5740 C. At what distance from it is the electric potential equal to 1100 V.
A football quaterback runs 15.0 m staright down the playing field in 2.50s. what are the average velocities for the three intervals
A 5 g bullet with an initial velocity of 95 m/s lodges in a block of wood and comes to rest at a distance of 6 cm. assume the bullet undergoes a constant negative acceleration; it slows at a constant rate. How much time does it take for bullet to ..
A speedboat moving at 30 m/s approaches a no-wake buoy marker 100 m ahead. The pilot slows the boat with a constant acceleration of negative 3.5 m/s^2 by reducing the throttle. How long does it take boat to reach the buoy.
Sam fields a baseball hit to him in the left field. He then throws the ball to third to force out the base runner, Mike. How high in the air does the ball go
An ac source of period T and maximum voltage V is connected to a single unknown ideal element that is either a resistor, an inductor, or a capacitor. At time t=0 the voltage is zero.
A gymnast with mass m1 = 47 kg is on a balance beam that sits on (but is not attached to) two supports. The beam has a mass m2 = 118 kg and length L = 5 m. Each support is 1/3 of the way from each end. Initially the gymnast stands at the left end ..
Spring mounted bumpers ensure that the collision is essentially elastic. If the velocity of the truck is 17km/h (in the same direction as the car's initial velocity) after the collision, what is the initial speed of the car
A player uses a hockey stick to increase the speed of a 0.200 kg hockey puck by 6m/s in 2 seconds. how much force was exerted on puck? how much on the stick.
Two ice skaters, with masses of 50.0 kg and 85.0 kg, are at the center of a 60.0 m-diameter circular rink. how long does the lighter skater take to reach the edge
You have invented a new game and are playing it with your friends. You have a projectile launcher that fires a brick (mass=2 kg) with a speed and angle that you can adjust. What is the work done by friction during the block's motion
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