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A small can of radius r=7.0cm and height h=10.0cm is suspended by a string in a beaker of water so that it's depth is 15cm below the surface. the can is heavy enough that it would sink if it were not tied to the string.(the density of water is 1g/cm^3)
A) What is the force that the water exerts on top of the can?
B) What is the force that the water exerts on the bottom of the can?
C) If the can has a mass of 2000 grams, what is the tension in the string?
Consider a gas of fermions at temperature T=0 in 3D space with dispersion law E(p) = v lpl^3 where v is a constant. calculate the Fermi energy and the ground energy
A singly charged positive ion has a mass of 3.20x10^-26 kg. After being accelerated from rest during a potential difference of 843 V, the ion enters a magnetic field of 0.920 T along a direction perpendicular to the direction of the field.
The US uses about 8 x 1019 J of energy per year. How much mass would that require if we could totally convert mass to energy? If the mass came from, say, turning used cars entirely into energy, estimate how many would be required?
A 13 kg rock is attached to a 2.5-m long string and twirled overhead. If the maximum tension that the string can sustain before breaking is 98.0 N, what is the maximum speed of the rock?
Determine the month and day when the Sun is at minimum altitude for an observer in Washington, D.C. (39°N). What is the altitude of the Sun at this time? At approximately what latitude is the noonday Sun overhead on April 15?
The wavelength of red helium-neon laser light is 632.8 nm. What is the wavelength of the laser light in the class that has an index of refraction of 1.5 in units of nm, What is the speed of the laser light in the glass in units of 10^8 m/s
A simple pendulum with a period T = 2.00 s is attached to the ceiling of an elevator which is initially at rest, Calculate the period of oscillations when the elevator accelerates downwards
the acceleration due to gravity on the moon is 1.62 ms2.1. calculate the friction force on a walking 75.0 kg astronaut
using a 60 cm focal length converging lens one wishes to obtain a virtual image which is four times as large as the
A system performs 352 J of work on its surroundings while losing 133 J of internal energy. Determine the heat transferred to the system during this process
King Arthur's knights fire a cannon from the top of the castle wall. The cannonball is fired at a speed of 50 m/s and at an angle of 35°. What is the ball's maximum height above the ground
an ice block mass m 11.0 kg is attached by a rope to a wooden box of mass m 16.0 kg. the coefficient of kinetic
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