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A consumer upset by the latest trend of postal rate increases has decided to try to send letters by balloon even though they might not reach their intended destination. A 66400 cm3 gas-filled balloon will provide enough lift for a 45.1 g package to be accelerated upward at a rate of 3.25 m/s2. For these circumstances, compute the density of the gas the consumer fills the balloon with. The acceleration due to gravity is g = 9.81 m/s2 and the density of air is air = 1.16 kg/m3. Neglect the mass of the balloon material and the volume of the package.
If a wave vibrates back and forth six times each second, and its wavelength is 7 meters, what is its frequency, period, and speed
A uniform ladder of length L and mass m leans against a frictionless vertical wall, making an angle of 48° with the horizontal. how high can you climb before the ladder begins to slip
In a circus performance, a monkey is strapped to a sled andboth are given an initial speed of 3.0m/s up a 18.0° inclined track. How far up the incline do the monkey and sled move
A 54-kg pole vaulter running at 11 m/s vaults over the bar. Her speed when she is above the bar is 1.7 m/s, determine her altitude as she crosses the bar
A 50 kg person is riding a Ferris wheel. The Ferris wheel consists of 8 metal cars, each with mass 1500 kg located 15 m from the center. What is the angular acceleration of the Ferris wheel
The electric field within the membrane separating the inside and outside of a biological cell is approximately 7.8MV/m, what is the potential difference across the membrane
You measure the length of a futuristic car to be 3.50m when the car is at rest relative to you. what result do you get
A 3.83m -long coil containing 225 loops is wound on an iron core (average ?=1850?0) along with a second coil of 115 loops, Determine the mutual inductance M. (units of H)
a 100W light bulb connected to a 12.0 V source experiences a voltage surge that produces 14.0V for a moment. By what percentage does its power output increase
The electric field at a distance of 0.148m from the surface of a solid insulating sphere with radius 0.367m is 1690N/C, Calculate the electric field inside the sphere at a distance of 0.217m from the center
If you detect a frequency shift of 195.4Hz in the 4000-Hz bell of a bicycle as it approaches and then leaves you, how fast is the bicycle going
A discus thrower (with arm length of 1.2 m) starts from rest and begins to rotate counterclockwise with an angular acceleration of 2.4 rad/s2. What is the tangential acceleration of the discus thrower at this point
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