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A 0.20-kg object attached to the end of a string swings in a vertical circle (radius = 80 cm). At the top of the circle the speed of the object is 4.5 m/s. What is the magnitude of the tension in the string at this position?
Two cylinders each contain 0.30 mol of a diatomic gas at 300 K and a pressure of 3.0 atm. What is the final temperature of the gas in the cylinder A
An R = 46.1 ? resistor is connected to a C = 43.0 ?F capacitor and to a ?VRMS = 102 V, and f = 108 Hz voltage source. Calculate the power factor when the capacitor is replaced with an L = 0.358 H inductor
American football uses a field that is 100.0 yd long, whereas a soccer field is 100.0 m long. Which field is longer, and by how much
Sketch a force diagram for the desk.
A car of mass m is initially moving with a velocity v. Find the time that it takes for the car to come to rest
Potassium is an essential element that normally comprises about 0.30% of a person's body mass. 0.12% of potassium is the radioactive K-40, What's the potassium activity in a 73kg person
The resistive-wire thermometer is then calibrated against a Hg thermometer. The resistance in terms of the temperature t on the Celsius scale can be optimally fitted by the expression R = R0(1 + alpha t + beta t2) where alpha = 3.80 Times 10-3 degree..
a revolving car wheel has a radius of 15m and a mass of 3 X 10^4 kg. what torque needs to be applied to stop the car wheel in 15 sec
A 11.1-kg cylinder rolls without slipping on a rough surface. At an instant when its center of gravity has a speed of 10.3 m/s, determine the following. (a) the translational kinetic energy of its center of gravity ____J (b) the rotational kinetic en..
A Ferris wheel accelerates from rest to an angular speed of 1.5 rad s-1 in 12 s. what is the net torque on the wheel
An image projected on a screen is 9.1 cm high and is 6.4 cm from the lens. If the object that produces the image is 1.2 cm tall on the screen
a bicyclist starts a sprint with an initial speed of 2.0m/s, she moves a constant acceleration, how long did it take the bicyclist to complete the race
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