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A 12.9 gram sample of an unknown metal at 26.5°C is placed in a Styrofoam cup containing 50.0 grams of water at 88.6°C. The water cools down and the metal warms up until thermal equilibrium is achieved at 87.1°C. Assuming all the heat lost by the water is gained by the metal and that the cup is perfectly insulated, determine the specific heat capacity of the unknown metal. The specific heat capacity of water is 4.18 J/g/°C.
electrons produced by a certain device are observed to travel in a circular path with a radius of 2.50 cm when placed
A 740g, 40cm long rod is free to rotate about a frictionless axle at one end. What is the rod's angular velocity immediately after the blow
A spacecraft is in a circular orbit regarding the moon, 1.76x10 5 m above its surface. The speed of the spacecraft is1800 m/s, and the radius of the moon is 1.74x 10 6 m. If the moon were a smooth, reflective surface,
q1. two bicycle tires are set rolling with the equivalent initial speed of 5.0 ms along a long straight road and
A trap door, of length and width 2.00 m, is held open at an angle of 65.0° with respect to the floor. what is the torque exerted on the trap door by the rope
A 2400 kg car moving at an initial speed of 25 m/s along a horizontal road skids to a stop in 64 m. Find the energy dissipated by friction
Consider an insulated vessel at a constant pressure of 1 atm containing 25 moles of liquid water at a temperature of 15oC. What is the final composition of the system
The minority carrier lifetime of a material is the average time which a carrier can spend in an excited state after electron-hole generation before it recombines. Calculate the minority carrier lifetime (in μs) for a single crystalline solar cell hav..
A parallel-plate air-filled capacitor having area 44 cm2 and plate spacing 5.0 millimeter is charged to a potential difference of 900 V. Evaluate the energy density between the plates
what is the magnitude of its velocity after the collision. A soccer player applies a force of 60.5 N to a soccer ball while kicking it. If the ball has a mass of 0.42kg, what is the acceleration of the soccer ball.
The potential difference among the plates of a capacitor is 170 V. Midway between the plates; a proton and an electron are released. The electron is released from rest. The proton is projected perpendicularly toward the negative plate with an initial..
The pilot of an airplane traveling 180 km/h wants to drop supplies to flood victims isolated on a patch of land 150 m below. The supplies should be dropped explain how many seconds before the plane is directly overhead?
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