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A certain radioisotope has a half-life of 11.0 days. What fraction of an initial sample of this isotope remains after 22.7 days?
The amplitude of a lightly damped oscillator decreases by 1.7% during each cycle. What percentage of the mechanical energy of the oscillator is lost
The average density of the planet uranus is 1.27 x 10^3 kg/m^3. The ratio of the mass of neptune to that of Uranus is 1.19. The ratio of the radius of Neptune to that of Uranus is 0.969. Find the average density of Neptune.
A charge Q is uniformly distributed throughout a nonconducting sphere of Radius R. What is the magnitude of the electric field at a distance of R/2 from the center of the sphere? What is the magnitude of the electric field at a distance of 2R from th..
A Carnot refrigerator operating between -10.0 ?Cand + 10.0 ?C extracts heat from the cold reservoir at the rate 100J/s. What is the rate at which heat is exhausted to the hot side
A 70.0 archer, standing on frictionless ice, shoots a 200arrow at a speed of 200. What is the recoil speed of the archer
A horizontal disk of mass 0.12kg and radius of 013m rotates freely about a vertical axis through its center with an angular speed of 5rad/s. What is the angular speed of the disk immediately after the material sticks to it
What is Johns resultant displacement
Suppose he hits the ball with a speed of 29 m/s at an angle of 26° above the horizontal. Explain how long was the ball in flight? How far did it travel?
A Carnot engine operates between 27C and 927C and preforms 4800 J of work. Calculate the net entropy change during one cycle
A sensitive gravimeter at a mountain observatory finds that the free-fall acceleration is 7.50×10?3 less than that at sea level. What is the observatory's altitude
A solid, uniform sphere of mass 2.0 kg and radius 1.7 m starts from rest and rolls without slipping down an inclined plane of height 5 m. What is the angular velocity of the sphere
Suppose that on earth you can throw a ball vertically upward a distance of 1.02 m. how high could you throw a ball on Pluto
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