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Gas is contained in a 5-L vessel at a temperature of 19°C and a pressure of 7 atm.
(a) Compute the number of moles of gas in the vessel.
_________mol
(b) Determine how many molecules are in the vessel?
_________molecules
A HeNe (Helium-Neon) laser has a beam power of 5.00 mW at a wavelength of 656 nm. Assume the beam is focused by a lens to a circular spot whose effective diameter is 15 wavelengths of the light.
An athlete swims the length L of a pool in a time t1 and makes the return trip to the starting poisition in a time t2. (a) If she is swimming initially in the positive x-direction, determine her average velocities symbolically in (a) the first hal..
an 9.0-kg object moving 5.0 ms in the positive x direction has a one-dimensional collision with a 3.0-kg object moving
A block of ice at 0°C whose mass initially is m = 48.4 kg slides along a horizontal surface, starting at a speed vo = 4.91 m/s, Compute the mass of ice melted as a result of the friction between the block and the surface
A converging lens and a diverging lens, separated by a distance of 30.0 cm, are used in combination. What is the focal length of the diverging lens
A 0.450-kg ice puck, moving east with a speed of 5.46m/s, What is the speed of the 0.450-kg puck after the collision
Using energy considerations, compute the average force the beam exerts on the pile driver while the pile driver is brought to rest.
q1. a cube of ice is taken from the freezer at -8.6degc and placed in a 102 g aluminium calorimeter filled with 286 g
A toroid is a coil of wire wrapped around a doughnut-shapedring (a torus). For a tightly wrapped toroid with N turns, the magnetic field lines of Bform concentric circles inside the toroid, and the field is zero outside.
A roller-coaster car has a mass of 506 kg when fully loaded with passengers. If the vehicle has a speed of 20.5 m/s at point , what is the force exerted by the track on the car at this point
The tires of a car make 58 revolutions as the car reduces its speed uniformly from 91km/h to 36km/h . The tires have a diameter of 0.84m. how much more time is required for it to stop
Two children hang by their hands from the same tree branch. The branch is straight, and grows out from the tree trunk at an angle of 24.3° above the horizontal. One child, by a mass of 45.6 kg, is hanging 1.20 m along the branch from the tree trunk.
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