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(a) A research balloon bound for the stratosphere is filled at sea level with 800 m3 of helium whose initial temperature is 285 K. The balloon is released, and it climbs to an altitude where the air pressure is 0.045 times its sea-level value. If the helium expands adiabatically, what is the balloon's volume now?
(b) What is the temperature of the helium?
An amount of ideal gas is con?ned to a sealed box at one-half atmospheric pressure, i.e., 50.65 kPa. What is the new pressure of the gas in the smaller box
guess the force between a proton and an electron at the Bohr radius of 0.5Å (1 Å=10-10 m). The magnitude of the charge of an electron, as well as a proton, is 1.6·10-19 C.
A stone has a mass of 6.00 x10-3 kg and is wedged into the tread of an automobile tire. The coefficient of static friction between the stone and each side of the tread channel is 0.84.
Two runners of mass 70kg and 60kg, respectively, have a total linear momentum of 350 kg•m/s. The heavier runner is running at 2.0 m/s. Determine the likely speeds of the lighter runner.
Light of wavelength 580nm illuminates a diffraction grating. The second-order maximum is at angle 41.5 degrees
A disoriented physics professor drives a distance 3.25km north, then a distance 3.65km west, Find the direction of the resultant displacement, using the method of components
An object is placed 19 cm to the left of a converging lens of focal length 29 cm. Find the position and magnification of the final image
A stationary whistle emits a sound of 188Hz. If passengers in a car hear the whistle with a frequency of 198 Hz, how fast was the car moving? Make use of 340 m/s for the sound velocity.
A ball of radius 37 cm is rolling down an inclined plane with no slipping. What is the balls angular acceleration at the bottom of the inclined plane
A galvanometer with a coil resistance of 14.1 is used with a shunt resistor to make a nondigital ammeter that has an equivalent resistance of 0.755. determine the full-scale current of the galvanometer
A Ball begins rolling at the left and has just suffient energy to climb up to point C, which is the top of the hill on the right
A gas expands while 502 J of energy is added to it as heat. The expanding gas does 422 J of work on its surroundings.
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