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A soap bubble hanging from the end of an open tube contracts under the action of its surface tension (the coefficient of surface tension is gamma). Assuming that the dielectric strength of air, i.e. the field strength at which breakdown occurs, is E_0, investigate whether the contraction may be prevented by placing a large charge on the bubble. What is the minimum equilibrium radius R of the bubble?
A gas is compressed at a constant pressure of 0.800 atm from 10.00L to 2.00 L. In the process,360 J of energy leaves the gas byheat. What is the work done on the gas?
q1. an airplane is flying with a velocity of 92.0 ms at an angle of 23.0circ above the horizontal. when the plane is a
What are the main assumptions of the free electron model? Give an example where the free electron model is in good agreement with experiment.
An aluminum rod is 17.0 cm long at20°C and has a mass of 350 g. If 14000 J of energy is added to the rod by heat, what is the change in length of the rod
A 26 Newton block rests on a horizontal surface. The coefficients of kinetic and static friction between the surface and the block are 0.4 and 0.7, correspondingly. Find the force of friction acting on the block if the tension is14 Newton
Two point charges, +4.70 uC and -8.20 uC, are separated by 3.90 m. What is the electric potential midway between them
A spherical rain drop carries a charge of 8.00×10-9C at the center and has a potential of 8.10×103V at the surface. Find the radius of the drop
the kinetic energy of a particle is equal to the energy of a photon. the particle moves at 4.2 of the speed of light.
A uniform ladder 5.0 meter long rests against a frictionless, vertical wall with its lower end 3.0 meter from the wall. The ladder weighs 160 Newton. Find how far along the ladder can the man climb before the ladder starts to slip
The total kinetic energy in one mole of nitrogen is 4,000 J. what is the root mean-square velocity of an individual particle in the ideal gas
What is the direction of the electric field along the positive zsemi-axis (vertical) if the field is created by: a uniformly charged circle in the x-y plane with the center atthe origin; a uniformly positively charged wire along the x axis;
Three children each of weight 356N make a long raft by lashing together logs of diameter 0.30m and length 1.8m. how many logs will be needed to keep them afloat in fresh water. take density of the logs to be 800kg/m^3.
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