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A spherical balloon is made from a material whose massis 3.00 kg. The thickness of thematerial is negligible compared to the 1.60 m radius of the balloon. The balloon isfilled with helium (He) at a temperature of 307 K and just floats in air, neither rising norfalling. The density of the surrounding air is 1.19 kg/m3. Find the absolute pressure of the helium gas.
A football coach in hopes of improving his kicker's performance fills a football with helium rather than air. what change in relative weight of the football
a mass at rest on a frictional metal flat circular plate radius 2m slides when the angle to the horizontal is raised
a collimated gamma ray beam consists of equal numbers of 0.1 mev and 1.0 mev photons. if the beam enters a 5 cm thick
In the rectangle in the drawing, a charge is to be placed at the empty corner to make the net force on the charge at corner A point along the vertical direction
In the sun, suppose the value of E (energy production per second per gram) drops to 1% of its central value at r/R = .02, which can be taken as the outer boundary of the solar core. Assume E==pT^4 where p is density and T is temperature. You have thi..
The force involved in a collision is 1.0 × 10^2 newtons. What is the value of the change in momentum
two loudspeakers placed 6.0 m apart are driven in phase by an audio oscillator, whose frequency range is 1350 Hz to 1826 Hz. What is the frequency produced by the oscillator
A singly charged ion of 7Li (an isotope of lithium) has a mass of 1.16×10?26kg, What is the radius of the ion's path in the magnetic field
A steel cable is stretched across a gorge. The cable is 190 m long and has a mass of 44 kg. When one end of the cable is struck with a hammer, a wave pulse travels down the cable, reflects at the far end, and is detected back at the first end 14 s la..
question given a typical wave function describing the state of a particle as a function of x at time t0 how would you
A loudspeaker produces a musical sound by means of the oscillation of a diaphragm whose amplitude is limited to 2.0 μm. At what frequency (in Hz) is the magnitude a of the diaphragm's acceleration equal to g?
a ball is shot from the ground into the air. at a height of 10.20 m the velocity is observed to be v 8.50 ms i 7.10
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