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(1) Find the buoyant force acting on the He balloon. The volume of the balloon might be calculated from the following. The balloon has a shape of a sphere with the diameter of 10 m. You may also need the density of the gas in the balloon: rHe=0.166 g/L at Standard Temperature and Pressure (STP, 20oC, 1 atm) and of the air, rAir=1.205 g/L.
(2) Find the net lifting force, if all material of the balloon with two passengers has a mass of 190 kg.
(3) How many more mass may the balloon lift?
An ocean liner leaves New York City and travels 20.0° north of east for 199km. How far east and how far north has it gone? In other words, what are the magnitudes of components of ship's displacement vector in the following directions.
A proton in the upper atmosphere moves at 8.6×105m/s , perpendicular to Earth's magnetic field, Find the curvature radius of the proton's trajectory
In this week's experiment, we will accelerate electrons and inject them into magnetic fields generated by Helmholtz coils in the direction perpendicular to the magnetic fields, what is the final speed of the electrons
On the Apollo 14 mission to the moon, astronaut Alan Shepard hit a golf ball with a golf club improvised from a tool. The acceleration free-fall on the moon is 1/6 of its value on earth
A solid disk of radius R and mass 2.66 kg is spinning at angular velocity 66.2 rpm about a vertical axis. What is the mass of the second disk
A yo-yo has a rotational inertia of 970 g·cm2 and a mass of 104 g. Its axle radius is 3.15 mm, What is the magnitude of its linear acceleration
It is proposed that future space stations create an artificial gravity by rotating. Suppose a space station is constructed as a 1600-m-diameter cylinder, What rotation period will provide "normal" gravity
An oxygen bubble at the bottom of a lake 20. m deep has a volume of 1.20 cm^3, calculate the initial pressure inside the bubble at the bottom of the lake
How various g's of acceleration does the astronaut experience when the device is rotating at top speed? Each 9.80 m/s^2 of acceleration is 1 g.
A ball is kicked from the ground toward a fence that is located 25 m away. By how much does the ball clear the fence
A mass M=171 kg is suspended from the end of a uniform boom. The boom (mass=69.0 kg, length=3.60 m) is at an angle %u03B8=69.0 deg from the vertical, Calculate the tension in the horizontal cable
Light bulb 1 operates with a filament temperature of 2400 K, whereas light bulb 2 has a filament temperature of 1600 K. Find the ratio A1/A2 of the filament areas of the bulbs
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