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A ball is thrown vertically upwards with an initial velocity of 21.56 meter per second. Ignoring air resistance, determine how long is the ball in the air?
Obtain the greatest height reached by the ball?
Compute the time at which the ascending ball reaches a height of 15 meter above the ground.
light from a helium - neon laser is shinedon a slit of width 0.02mm. Describe qualitatively the pattern of light seen on ascreen 1.0 meter away. and how would the pattern be different if the slit were 0.06mmwide instead of 0.02mm?
A sled weighs 100N. It is held in place on a frictionless 20 degrees slope by a rope attached to a stake at the top, the rope is parallel to the slope. What is the normal force of slope acting on the sled.
When a person inhales, air moves down the bronchus (windpipe) at 17 cm/s. The average flow speed of the air doubles through a constriction in the bronchus. Assuming incompressible flow, determine the pressure drop in the constriction.
Calculate the velocity of a 50.0g steel ball shot from a slingshot with a 120N/m spring constant when pulled back 35cm and released
1.0 kg of ice at temperature T' = 0 oC is melted into water at the same temperature by placing it in contact with a reservoir at temperature T = 22.1 oC. What is the change in the entropy of the universe to two decimal places
A particle with a charge of 4.10nC is in a uniform electric field E? directed to the left, What work was done by the electric force and What is the magnitude of E
A roller coaster seat exerts a normal force of 120N on a 40kg passenger at the apex of a vertical loop. what is the speed of the coaster
At a certain location, the horizontal component of the earth's magnetic field is 4.90 10-5 T, due north. A proton moves eastward with just the right speed, so magnetic force on it balances its weight. Find the speed of the proton.
At the distance of the earth from the sun, the pressureexerted by sunlight is about 10-5 Pa. what acceleration does this force give it
A jellyfish is floating in a water-filled glass tank 1.00 m behind a flat pane of glass 6.00 cm thick and having an index of refraction of 1.50. Where is the image of the jellyfish located
As an eager scientist on a hot summer day you wish to determine how much ice to buy to add to your cooler which is filled with 36 cans of soda which are warm at 81.7°F. how much ice needs to be added to your cooler
A freezer is used to freeze 2.0 L of water completely into ice. The water andthe freezer remain at a constant temperature of T =0°C. Determine the change in the entropy of the freezer
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