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Q1. During an all-night cram session, a student heats up a one-half liter (0.50 x 103 m3) glass (Pyrex) beaker of cold coffee. At first, the temperature is 18 °C, and the beaker is filled to the brim. A short time later when the student returns, the temperature has risen to 92 °C. The coefficient of volume expansion of coffee is the same as that of water. How much coffee (in cubic meters) has spilled out of the beaker?
Q2. Far in space, where gravity is negligible, a 495 kg rocket traveling at 95 m/s fires itsengines. The thrust force as a function of time,with horizontal axis in 11 sincrements. The mass lost by the rocket throughout these 30 s is negligible.
In creating his definition of horsepower, James Watt, the inventor of the steam engine, calculated the power output of a horse operating a mill to grind grain or cut wood.
A boat takes 3.30 hours to travel 40.0 km down a river, then 5.00 hours to return. How fast is the river flowing
An object is moving along a straight line and the uncertainty in its position is 1.5 m. Find the minimum uncertainty in the momentum of the object
An Earth satellite moves in a circular orbit 644 km above Earth's surface with a period of 97.40 min, What are the magnitude of the centripetal acceleration of the satellite
A pump uses a piston of 15 cm diameter which moves 2 cm/s. What is the fluid velocity of a tube 3mm in diameter
The arrangement is, in effect, a hollow tube of current 2.1A. find the magnetic field outside the cylinder
A wheel (radius 0.6 m) is rolling on a horizontal surface with a center of mass acceleration of 0.7 m/s2. find the friction force acting between the wheel and the surface
David is driving a steady 21.0 when he passes Tina, who is sitting in her car at rest. Tina begins to accelerate at a steady 2.70 at the instant when David passes. How far does Tina drive before passing David.
A patient is going to be prescribed bifocals which will be 3.20 cm from the eye, Without the bifocals, what is the patient's near point
50 g of gasoline are mixed with 38 g of water. What is the average density of the mixture
How many electrons are transferred. What is the smallest thickness of a soap film that would appear black if illuminated with 490 light? imagine there is air on both sides of the soap film.
A fun-loving 11.4 {rm kg} otter slides up a hill and then back down to the same place. If she starts up at 5.75 {rm m/s} and returns at 3.75 {rm m/s}, how much mechanical energy did she lose on the hill.
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