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A 1.10 balloon is filled with helium gas until it becomes a 23.0 -diameter sphere. What maximum mass can be tied to the balloon (with a massless string) without the balloon sinking to the floor?
the work being performed in this lab serves to solidify our understanding of how a magnetic field around a ring behaves
A 60 g ball is tied to the end of a 50 cm --long string and swung in a vertical circle. how far to the right does the ball hit the ground
A very long, straight solenoid with a cross-sectional area of 6.00cm2 is wound with 40.0 turns of wire per centimeter, What is the average induced emf in the secondary coil
Galaxies form by gravitational collapse of regions that are denser than average. Noting that the present day average mass density of the universe is ρ = 3 × 10-30 g/cm-3, estimate how long it takes for a galaxy to collapse.
A bob (small ball) is attached to the lower end of a cord that is attached to the cieling and moves in a horizontal circle at a constant speed. (The cord sweeps out a cone as the bob rotates.) The bob has a mass of 0.040 kg, the cord has a length ..
You've decided to protect your house by placing a 5.8-m -tall iron lightning rod next to the house. What minimum diameter must the rod have
A 65kg man is riding on a 22kg cart traveling at a speed of3.6 m/s. What is the resulting change in the cart's speed
The magnetic field due to a currnt pulse in a single long, straight axon nerve fiber is 1.2X10^-10T at a distance 0.0013m from axon. What is the current in the axon
Consider a 1-D NaBr lattice. The frequency at the optical mode at k=pi/a is f=10.1THz. find the frequency for the optical mode at band center (k=0)
A hot-air balloon is ascending at the rate of 10 m/s and is 97 m above the ground when a package is dropped over the side. With what speed does it hit the ground
Liquid nitrogen has a boiling point of 77.3 K and a latent heat of vaporization of 2.01 105 J/kg. A 60.0-W electric heating element is immersed in an insulated vessel containing 46.5 L of liquid nitrogen at its boiling point. How various kilograms of..
If you move towards a pipe at a speed of 3.3m/s, what frequency will you hear from this organ pipe? speed of sound is 330m/s
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