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A 100 g aluminum calorimeter contains 250 g of water. The two substances are in thermal equilibrium at 10°C. Two metallic blocks are placed in the water. One is a 50 g piece of copper at 66°C. The other sample has a mass of 58 g and is originally at a temperature of 100°C. The entire system stabilizes at a final temperature of 20°C. Determine the specific heat of the unknown second sample.
Two narrow slits 55 micrometer apart are illuminated with light of wavelength 507nm. What is the angle of the bright fringe in degrees
An eagle is flying horizontally at 6.7 m/s with a fish in its claws. It accidentally drops the fish. How much time passes before the fish's speed doubles
A projectile is shot from the ground at an angle of 55 degrees with respect to the horizontal, and it lands on the ground 5 seconds later. find the horizontal component of initial velocity
An express subway train passes through an underground station. It enters at t = 0 with an initial velocity of 24.0 m/s and decelerates at a rate of 0.150 m/s2 as it goes through. How long is the nose of the train in the station
A 20 kg uniform beam is placed on two supporting stands on either end. A 75 kg painter stands at 1.2 m from one of the ends. find the forces at the two supports
A concave spherical mirror with a focal length of 15cm forms an upright image that is 5 times larger than the original object
The right and left end wires of two circuits are separated by a distance d = 2 mm. If L = 13 cm, V1 = 14 V, V2 = 17 V, R1 = 1 ?, what is the resistance (in ohms) of R2
A candle is on the axis of a 15-cm-focal-length concave mirror, 36 cm from the mirror. Is the image real or virtual
The electric field between two equal but opposite point charges, at a point four-ninth the distance from the negative charge to the positive charge, is 4.39*10
One of the strange particles observed in early bubble chamber experiments was Ξ, called the “cascade” particle. It was produced in the reaction,
A U-shaped tube is partly filled with water and partly filled with a liquid that does not mix with water. what is the density of the liquid
q1. a 3.988x10-26 kg mass particle with negative -1.44x10-18 c charge is initially moving at 50ms parallel to a wire
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