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A 3.4 kg piece of aluminum at 28°C is placed in 1.0 kg of water in a Styrofoam container at room temperature (20°C). Estimate the net change in entropy of the system in cal/K
An object is located 10 cm in front of a mirror that forms an image of the object on a wall 300 cm, What type of mirror is required to form this image?
From what height will you have to drop the rock on Earth so that the fall-time on both planets is the same.
A simple pendulum consists of a 4kg mass attached to a 3m long rope. At t=0 it is moving to the right at 0.4m/s. What is the angular frequency of the oscillation
What is the radius of the pen. How far should it now sail to reach its original destination.
If the mass of both weights is 225 gm, the first mass is located 20 north of east, the second mass is placed 20 south of east, and the transducer sensitivity is 0.5 volts/Newton, how large a voltage do you expect to measure? suppose the transducer..
the coefficient of static friction is 0.26. If you apply the minimum force needed to get the refrigerator to move, illustrate what will the acceleration then be?
A 22.5 g bullet is fired from a rifle. It takes 2.60 10-3 s for the bullet to travel the length of the barrel, find the average net force exerted on the bullet
Study of the fragment
Ina mass spectrometer, ions are directed into a magnetic field, where they curve around in the field and strike a detector. If several singly ionized atoms travel at the equal speed through the magnetic field, would you expect them all to be defle..
A child sits still on a swing that is supported by two chains. Each chain makes a 15.0° angle with the vertical. The child's mass is 25.0 kg. What is the tension in each chain? (Ignore the mass of the seat and chains.)
Two long, straight wires are parallel and are separated by a distance of d = 0.230 m, The top wire in the sketch carries current I1 = 3.80 A, toward the right, and the bottom wire carries current I2 = 7.00 A, what are the magnitude and direction of t..
What plate separation is required for a parallel plate.
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