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Question: A 0.200-kg piece of aluminum that has a temperature of -163 °C is added to 1.1 kg of water that has a temperature of 1.8 °C. At equilibrium the temperature is 0 °C. Ignoring the container and assuming that the heat exchanged with the surroundings is negligible, determine the mass of water that has been frozen into ice.
Light rays in a material with index of refrection 1.25 can undergo total internal reflection, Find this material's index of refraction when the required critical angle is 67.9°
A drop of water on a countertop reflects light from a flower held 2.4 cm directly above it. The flower's diameter is 1.8 cm, What is the focal length of the water drop
Two long, parallel wires are separated by a distance of 2.8 cm. The force per unit length that each wire exerts on the other is 5 ×10-5 N/m. What is the current in the second wire
A 46-cm-long wire with a mass of 10.5 g is under a tension of 52.0 N. Both ends of the wire are held rigidly while it is plucked. What is the speed of the waves on the wire
An airplanes airspeed (relative to still air) is 135 mph. The wind speed relative to the ground is 37 mph and is directed at theta = 51 deg
A man ties one end of a strong rope 7.64 m long to the bumper of his truck, 0.505 m from the ground, and the other end to a vertical tree trunk at a height of 3.90 m. Compute the magnitude of the torque on the tree
A jet plane lands with a velocity of +103 m/s and can accelerate at a maximum rate of -5.00 m/s2 as it comes to rest. find the minimum time needed before it can come to rest
A 92-kg man's thighbone has a relaxed length of 0.55 m, a cross-sectional area of 6.8 10-4 m2, By how much does the thighbone compress
Radio waves of very long wavelength can penetrate farther intoseawater than those of shorter wavelength. What is their wavelength in air
After impact, the block slides 7.5 m before coming to rest. If the coefficient of kinetic friction between block and surface is 0.650, illustrate what was the speed of the bullet immediately before impact?
question a projectile is fired directly upward at such an initial velocity that it reaches half its height of 45
A car moving at 110 km/hr slams into a brick wall. If the hood of the car crumples 1.25 m during the crash, what is the magnitude of the acceleration of the car during the crash
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