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Suppose 1.86 kg of water at 14.4C is mixed with 2.28 kg of water at 79C. After equilibrium is reached, the mixture has an uniform temperature of 49.9768C. What is the change in entropy of the system? The speci?c heat of water is 4186 J/kg · K.
Light of intensity 0.5 W/m2 passes through the pupil of one of your eyes and eventually falls on your retina. how much light energy passes through in one minute
A 116 g Frisbee is 28 cm in diameter and has about half its mass spread uniformly in a disk, and the other half concentrated in the rim. What is the rotational inertia of the Frisbee
the vehicle is used to transport supplies to and from the bottom of the 25-present grade. each pair of wheels one at a
Three resistors having resistances of 330?, 100? and 220? are connected in parallel. What is the equivalent resistance? ____________________. When the combination is connected across a battery, the current in the 100? resistor is 0.12A.
A force vector has a magnitude of 590 newtons and points at an angle 44o of below the positive x axis. What is (a) x scalar component and (b) y scalar component of the vector.
Two carts of equal mass, m = 0.280 kg, are placed on a frictionless track that has a light spring of force constant k = 47.6 N/m attached to one end of it, Find the magnitude of the velocity of the blue cart just after the first collision
F = G.Mm/r2 where F is the gravitational force, M and m are masses, and r is a length. Force has the SI units kg · m/s2. What are the SI units of the proportionality constant G
The 3.3 kg piece of wood slides on the surface. The curved sides are perfectly smooth, but the rough horizontal bottom is 35 m long and has the kinetic friction coefficient of 0.24 with the wood. The piece of wood starts from rest 6.0 m above the rou..
You are standing on the surface of a small spherical moon whose radius is 6.30 x 10^4 m and mass of 8.00 x 10^18kg. What maximum height above the surface of the Moon will the rock reach
A harmonic wave on a string with mass per unit length 0.065 kg/m and a tension of 71.0 N has an amplitude of 6.9 cm. find the average power propagated along the string
An airplane with a speed of 76.6 m/s is climbing upward at an angle of 49.5 ° with respect to the horizontal, Relative to the ground, determine the angle of the velocity vector of the package just before impact
Two air-track gliders m1 and m2 are joined together with a light string. What is the tension in the cord joining gliders
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