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A shell is fired at an angle of 20 degree above the horizontal at a velocity of 200 m/s
a) what is the range ?
b) What is its velocity at highest point of the trajectory?
A thermos contains 159 cm3 of coffee at 93.7 °C. To cool the coffee, you drop two 13.2-g ice cubes into the thermos. The ice cubes are initially at 0 °C and melt completely. What is the final temperature of the coffee in degrees Celsius? Treat the..
A girl delivering newspapers covers her route by traveling 5.00 blocks west, 4.00 blocks north, and then 8.00 blocks east. What is the total distance she travels
find the electric field outside a uniformly charged hollow cylindrical shell with radius r and charge density sigma an
A home-run baseball is hit with an initial speed vo=37.0 m/s at an initial angle qo=53.1o. Find the time when the ball reaches the highest point of its flight, and find its height at this point
A submarine is 2.95 multiply.gif 102 m horizontally from shore and 1.00 multiply.gif 102 m beneath the surface of the water. Find the height of the target above sea level
What is the minimum photon energy needed to create an electron - positron pair when a photon collides (a) with a free electron at rest and (b) with a free proton at rest?
A small object with a mass of 333 mg carries a charge of 30.0 nC and is suspended by a thread between the vertical plates of the parallel-plate capacitor. The plates are separated by 2cm.
A car is traveling at 67.53 mph. The driver applies the brakes and the car decelerates at 5.68 m/s2. What is the stopping distance in meters
In a very busy off-campus eatery one chef sends a 249-g broccoli-tomato-pickle-onion-mushroom pizza sliding down the counter from left to right at 1.67 m/s. At what speed does it move
Nine electrons are injected into a one-dimensional energy well with a width of 2 nm. (a) What will be the quantum numbers and energies of each of the nine electrons? (b) What is the lowest-energy photon that can now be absorbed by electrons in this e..
On a particular afternoon in Houston, the nitrogen (N2) molecules in the air have an rms speed of 511 m/s. What is the rms speed of the carbon dioxide (CO2) molecules
A spacecraft flies in the horizontal direction at a speed of v=0.980c, What is the slope angle to an astronaut on the spacecraft
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