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An unknown material has a normal melting/freezing point of -26.3° C, and the liquid phase has a specific heat capacity of 160 J/(kg · C°). One-tenth of a kilogram of the solid at -26.3° C is put into a 0.153-kg aluminum calorimeter cup that contains 0.105 kg of glycerin. The temperature of the cup and the glycerin is initially 25.1° C. All the unknown material melts, and the final temperature at equilibrium is 22.0° C. The calorimeter neither loses energy to nor gains energy from the external environment. What is the latent heat of fusion of the unknown material?
An 800 kg car moving at 6 m/s begins to coast down a hill 40m high with its engine off. How much energy was lost to friction
A water pipe is having a 2.5cm inside diameter carries water into the basement of a house at a speed of 0.90m/s, what are the speed AND water pressure at the second floor
The impact of the head of a golf club on a golf ball can be approximately regarded as an elastic collison. what must the speed of the club be before impact
A ball of mass 0.330 kg is thrown upward, rising 11.1 m above the point at which it was released. Compute the average force exerted on the ball by the hand
the wheels of an automobile are locked as it slides to a stop from an initial speed of 30.0 m/s. how far does it take the car to stop
A source emits sound uniformly in all directions. There are no reflections of the sound. What is the total sound power P emitted by the source
a radio wave, sent from mars to the earthwhen the two are closest to eachother, takes 3.03 minutes. calculate the distance between perihelion and aphelion for mars
Three equal charges of magnitude +4.00 uC are placed at the corners of an equilateral triangle of side 2 cm. what is the electric potential energy of the system
question 1 in cylindrical coordinates ds2 drho2 p2dphi2 dz2. find the non-zero christoffel symbols and the equations
a speedy tortoise can run with a velocity of 10 cm/s and a hare can run 20 times as fast. in a race they both start at the same time but the hare stops to rest for 2 min, what was the length of the race
q1. an electron moves with a horizontal velocity of 3106 ms as it enters a deflector inside a tv tube. the electron
an arrangement in which four disks are suspended by cords. The longer, top cord loops over a frictionless pulley, What are the masses of each disk
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