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A cannon of mass 1500 kg fires a 10-kg shell with a velocity of 200m/s at an angle of 45? above the horizontal. Find the recoilvelocity of the cannon across the level ground.
A laser produces an average power of 5.5 W in a light beam 1.0 mm in diameter. Find the peak electric field of the laser light
A spring is hung from the ceiling. A 0.375 -kg block is then attached to the free end of the spring. Find the angular frequency of the block's vibrations
100 Joules of heat energy are transferred to 20g of mercury. By how much does the temp. increase
a stable nucleus contains many protons very close to each other all positively charged. why do the protons not fly
During heavy rain, a rectangular section of a mountainside measuring 2.7 km horizontally, 0.85 km up along the slope, What is the mass of the mud sitting above an area of 4.0 m2 in that section
Using a ball that has unknown mass m. You plot your data in the form of f2 versus M/L, with f in rev/s,M in kg, and L in m. calculate the mass m of the ball
how fast the air flow over the upper surface of the wing. What is the coefficient of kinetic friction between the box and the floor.
A 2.0 cm tall object is placed 15 cm in front of a converging lens with a focal length of magnitude 20 cm. Find the image location and magnification
you are driving in the turnpike at a speed of 110 mph 49.2ms way over the posted speed limit of 55 mph 26.6ms when you
an athlete executing a long jump leaves the ground at a 30.9o angle and travels a horizontal distance 7.03m. what was
A 90.0-kg fullback running east with a speed of 5.00 m/s is tackled by a 95.0-kg opponent running north with a speed of 3.00 m/s. Where did the lost energy go
a car of 1200 kg travels east call it x at 24 ms while a truck of 2200 kg travels north call it y at 19 ms. they
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