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A 9-g bullet is fired from a rifle. It takes 3.30 10-3 s for the bullet to travel the length of the barrel, and it exits the barrel with a speed of 745 m/s. Assuming that the acceleration of the bullet is constant, find the average net force exerted on the bullet.
_______ N
Find the work done by this force on the particle.
When resting, a person has a metabolic rate of about 3.0 105 joules per hour. The person is submerged neck-deep into a tub containing 1.12 103 kg of water at 22.10° C. find the water temperature after half an hour
Assume you are a medieval knight attacking a castle with a cannon. The cannonball leaves the cannon with a speed of 40.7 m/s, What is the time of flight of the cannonball
Compiute the average power output in horsepower. Calculate assuming the body is 14% efficient, what rate of energy input was required.
What is the maximum reaction time. A 1.52 wide, 1.50 high, 1500 car hits a very slick patch of ice while going 21.0 .If friction is neglected, how long will it take until the car's speed drops to 14.
What is the height of the power line and the initial speed of the ball?
A 14.40 kg block and a 25.3 -kg block are resting on a horizontal frictionless surface. Between the two is squeezed a spring (spring constant = 1108 N/m).
At a distance of 1.41 m from a point charge of +2.74 ?C, how many of the additional equipotential surfaces are crossed by the time the electric field has shrunk to one-half of its initial value
A student driving at a constant speed of 45 m/sec passes a highway patrol car parked on the side of the road. How long does it take to over take the student
When the Sun is directly overhead, a hawk dives toward the ground with a constant velocity of 4.75 m/s at 59.5° below the horizontal, Calculate the speed of her shadow on the level ground
If the coefficient of volume expansion of mercury is 18x10(^-5) (K^-1), what is the coefficient of volume expansion in the glass?
The ball is caught 55.3841m from the thrower. The acceleration due to gravity is 9.81m/s square. Explain how long is it in the air?
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