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Assume that you release a small ball from rest at a depth d below the surface in a pool of water and the ball rises and because the ball emerges from the water it shoots up a distance 3d above the water. If the drag force on the ball from the water is negligible, what is the ratio of the density of the ball to the density of water? (Neglect any transfer of energy to the splashing and waves produced with the emerging ball and suppose that you are near the surface of the Earth.)
An insect 1.1 tall is placed 1.3 beyond the focal point of the objective lens of a compound microscope. The objective lens has a focal length of 17 , Where is the image formed by the objective lens
A light ray in the core (n = 1.40) of a cylindrical optical fibretravels at an angle θ1= 49.0 degrees with respect to the axisof the fibre. A ray is transmitted through the cladding (n = 1.20)and into the air. What angle θ2 does the exiting ray make ..
A 1.0 cm wide diffraction grating has 1000 slits. It is illuminated by light of wavelength 550 nm. What are the angles of the first two diffraction orders
Maricru slides a 60.0-kg crate up an inclined ramp that is2.0-m longg and attached to a platform 1.0 m above floor level... A400.0-N force parrallel to the ramp, is needed to slide the crateup the ramp at a constant speed.
a rectangular block of copper has sides of length 13cm23cm and 38cm. if the block is connected to a 7.0v source across
Force F = (-9.0 N) i + (5.0 N) j acts on a particle with position vector r = (-5.0 m) j + (1.0 m) k. What is the torque on the particle about the origin
The interior of a house is maintained at 20 degrees Celsius,while the outdoor temperature is -10 degrees Celsius, At what rate does the entropy of the universe increase
A man pushing a mop across a floor causes it to undergo two displacements. Find the magnitude and direction of the second displacement
A Carnot engine operates between the temperatures 420K and 300K, How much heat is discarded to the cold reservoir as this work is done
A uniform diving board, 12m long and 20kg mass is placed on a platform. How far can a 60kg person walk down the board from the edge of the platform without board tipping over.
Calculate the magnitude of the angular momentum of the Mars due to its rotation around an axis through the north and south poles, modeling it as a uniform sphere.
Why is it justified to say that the momentum in the horizontal direction is conserved over the collision interval? Is momentum conserved before and after the collision? Explain.
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