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A Styrofoam cup holding 155 g of hot water at 97°C cools to room temperature, 23.0°C. What is the change in entropy of the room? Neglect the specific heat of the cup and any change in temperature of the room.
Two 53 {rm g} blocks are held 30 {rm cm} above a table. One of them is just touching a 50-long spring. The blocks are released at the same time. The block on the left hits the table at accurately the same instant as the block on the right first comes..
When an electric turntable is first switched on, it accelerates at a constant rate through (+)1.25 revolutions in order to attain its full operating speed of 78.0 rpm.
Two large parallel metal plates are 1.4 cm apart and have charges of equal magnitude but opposite signs on their facing surfaces. what is the electric field (in V/m) in the region between the plates
A model of a red blood cell portrays the cell as a spherical capacitor, a positively charged liquid sphere of surface area A separated from the surrounding negatively charged fluid by a membrane of thickness t, Estimate the capacitance of the cell ..
A supertanker with the mass of 4.67 × 10^8 kg is moving with a constant velocity. Its engines generate a forward thrust of 8.71 × 10^6 N.
q1. in accordance to one estimate the first atomic bomb released an energy equivalent to 20 kilotons of tnt. if 1 ton
As a crude model for lightning, consider the ground to be one plate of a parallel-plate capacitor and the cloud to be the other plate, What is the capacitance of the system
In February 2004, scientists at Purdue University used a highly sensitive technique to measure the mass of a vaccinia virus (the kind used in smallpox vaccine). What is the mass of the virus in femtograms
A diving board oscillates with simple harmonic motion of frequency 3.23 cycles per second. What is the maximum amplitude with which the end of the board could vibrate in order that a pebble placed there not lose contact with the board during the o..
a cylindrical steam boiler shell is of riveted construction. it is made from plates 18mm thick and has a diameter of
Two equal forces are applied to a door. The first force is applied at the midpoint of the door; the second force is applied at the doorknob. Which force exerts the greater torque
For a location near Norfolk, Virginia at an unspecified time, what is probability that the wind speed will be below 8 meters per second. Use the Weibull Probability Distribution with values C = 6.4 and k = 2.1.
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