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A 2.65-g copper coin at 21.5°C drops 60.0 m to the ground. (Assume the specific heat of copper is 387 J/kg · °C.)
(a) Assuming 65.0% of the change in gravitational potential energy of the coin-Earth system goes into increasing the internal energy of the coin, determine the coin's final temperature.
An electric dipole has opposite charges of 5.0x10^-15 C separated by a distance of .40mm. Determine the magnitude of the torque exerted on the dipole by the electric field
Three point charges have equal magnitudes, two being positive and one negative. These charges are fixed to the corners of an equilateral triangle. The magnitude of each of the charges is 4.0 µC, and the lengths of the sides of the triangle are 4.4..
A certain gyroscope consists of a uniform disk with a 56 cm radius mounted at the center of an axle that is 13 cm long and of negligible mass. what is the precession rate
An insulated Thermos contains 123 cm3 of hot coffee at 73 °C. You put a 12.0 g ice cube at its melting point to cool coffee. By how various degrees has your coffee cooled one time the ice has melted and equilibrium is reached? Treat the coffee as tho..
The moon is observed using a telescope that has an objective lens with a focal length of 3.0 m and an eyepiece with a focal length of 7.5 cm. What is the angular diameter of the moon
two buses started from the same depot at the same time and traveled in opposite directions. after traveling 4 hours
A ball is thrown upward from a platform 4.0 m high with a speed of 23 m/s at an angle of 37 o from the horizontal. What is the magnitude of its velocity when it hits the ground?
Suppose you have a tube 1.20 m long, open on both ends. Determine the frequency of the 2nd overtone, assuming the speed of sound to be 343 m/s. Repeat for the same length tube but with a closed end.
Consider a container insulated from the environment and divided into two sections by a very thin, stiff membrane, In which direction heat energy is transferred
Two in-phase loudspeakers are some distance apart. What is the spacing between points where constructive interference occurs? The speed of sound in air is 343 m/s
An 8m, 290 N uniform ladders rests against a smooth wall. The coefficient of static friction between the ladder and the ground is 0.75, and the ladder makes a 50° angle with the ground. How far up the ladder can a 720 N person climb before the lad..
A pendulum consists of a 4.98kg mass on the end of a 0.873 m string. The mass is pulled aside so the string makes an initial angle with the vertical of 12.5o. The mass is then released with initial speed of 2.10m/s upward and perpendicular to the rop..
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