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In an experiment, 300 g of aluminum (with a specific heat of 900 J/kg·K) at 100°C is mixed with 54.0 g of water (4186 J/kg·K) at 20°C, with the mixture thermally isolated.
(a) What is the equilibrium temperature? ___ °C
(b) What is the entropy change of the aluminum? ___ J/K
(c) What is the entropy change of the water? ___ J/K
(d) What is the entropy change of the aluminum-water system? ___ J/K
A screen is placed 42.7 cm from a single slit that is illuminated with light of wavelength 677 nm. If the distance between the first and third minima in the diffraction pattern is 3.45 mm, what is the width of the slit.
Consider the equation for heat transfer through a wall. Based on this, describe two simple ways you could modify your home to decrease the rate at which heat is lost through your walls.
A bat is pursuing an insect and using echolocation of 60-kHz sound waves to track the insect. find the difference in the two echo times the bat measures
Frames S and S' are moving relative to each other along the x and x' axes. They set their clocks to t = t' = 0 when their origins coincide, Compute the spacetime interval ?s between the events
Two identical small insulating balls are suspended by separate 0.22-m threads that are attached to a common point on the ceiling. Each ball has a mass of 8.10 10-4 kg.
Six pendulums of mass and length are released from rest at the similar angle from vertical. Rank the pendulums according to the number of complete cycles of motion each pendulum goes through per minute.
what is the magnitude FN at the highest point. The positive charges are arranged in a square. sides- .10 m the top right is 9 nC bottom right is 3 nC and the bottom left is 1 nC. find the magnitude of the electric field at the fourth corner of the ..
Protons in cosmic rays have been observed with kinetic energies as large 2.70 × 108 eV. How fast are these protons moving
The focal length of the human eye is approximately 1.7 cm. What is the f-number for the human eye in bright light, when the pupil diameter is 3.0mm
A child is in danger of drowning in the Merimac river. The Merimac river has a current of 3.1 km/hr to the east, How far from the dock does the boat reach the child
Two speakers, one directly behind the other, are each generating a 152-Hz sound wave. What is the least separation distance between the speakers that will produce destructive interference at a listener standing in front of them.
How much work must be done to bring three electrons. calculate the mass of an ice cube.
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