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A helium weather balloon is used to lift a meteorological sensor package high up into the atmosphere. At Earth%u2019s surface it contains 3 m3 of helium at a pressure of 1 atmosphere. At the maximum height that the balloon reaches (~20 km), the volume of helium in the balloon expands to 42 m3. The temperature at the meteorological station where the balloon was released was 30 oC and at the balloon%u2019s maximum height, -56 oC.
a) Calculate the number of moles of helium in the balloon.
b) Find the atmospheric pressure the balloon experiences at its maximum height.
Birds resting on high-voltage power lines are a common sight. The copper wire on which a bird stands is 2.5 cm in diameter, calculate the potential difference between its feet
A 1.20 liter flask contains a certain quantity of ideal gas at 305 K. after that an equal number of molecules of the same gas are added to the flask, after which the absolute pressure is 1.30 times its unique value. What is the final temperature.
The angular momentum of a flywheel having a rotational inertia of 0.148 kg·m^2 about its central axis decreases from 6.70 to 0.560 kg·m^2/s in 3.50 s. How much work is done on the wheel
An 80.7-kg jogger is heading due east at a speed of 1.950 m/s. A 53.60 kg jogger is heading 33.1° north of east at a speed of 2.89m/s. compute the magnitude (enter first) and direction of the sum of momenta of the two joggers.
A centrifuge in a medical laboratory rotates at an angular speed of 3500 rev/min. When switched off, obtain the constant angular acceleration of the centrifuge
The Paschen series in the hydrogen emission spectrum is formed by electron transitions from ni > 3 to nf = 3. What is the longest wavelength in the Paschen series
A ball of mass 522 g starts at rest and slides down a frictionless track. It leaves the track horizontally, striking the ground a distance of 1 m from the end of the track after falling the vertical distance 1.25 m from the end of the track.
A car starts from rest and travels for 10s with a uniform acceleration of +2.4 m/s2. The driver then applies the brakes, causing a uniform negative acceleration of -2.0 m/s2.
A capacitor in a single-loop RC circuit is charged to 57% of its final voltage in 1.3s, Find the percentage of the circuit's final voltage after 4.3s
If the near-point distance of the jeweler is 21.8cm, find the angular magnification when the diamond is held 5.74cm from the magnifying glass
We know that the acceleration due to gravity at the surface of the Earth is 9.8m/s2, There's one other domain, what's the value of gravity below the surface of the Earth
Visible light passes through a diffraction grating that has 900 slits per centimeter, What is the difference between these wavelengths
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