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(a) How long would it take a 1.50 x 10^5 kg airplane with engines that produce a maximum of 100 MW of power to reach a speed of 200 m/s and an altitude of 12.0 km if air resistance were negligible?
(b)If it actually takes 850 s, what is the power applied, in megawatts?
(c) Given this power, what is the average force of air resistance if the airplane takes 1200 s? (Hint: You must find the distance the plane travels in 1200 s assuming constant acceleration.)
When striking, the pike, a predatory fish, can accelerate from rest to a speed of 4.1m/s in 0.15s, How far does the pike move during this strike
on a frictionless horizontal surface a 1.50 kg mass traveling at 3.50 m/s collides with and sticks to a 3.00 kg mass that is intially at rest. What will be the maximum compression of the spring
a 15 m beam is supported (hinged supports) at both ends and is loades with a 50 n weight 4 m from one end and a 100 n weight 8 meters from the same end. what are the forces at the two supports
a ball with a mass of 10g is swung in a horizontal circular path on a string of length 0.5m. if the balls speed is 4.5m/s, estimate the centripetal acceleration
dry air had a co2 mole fraction of 0.00038 in 2007 compared with 0.00032 in 1965. calculate the total mass of co2 that
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A 190 pF capacitor is charged to a potential difference of 120 V, and the charging battery is disconnected. The capacitor is then connected in parallel with a second (initially uncharged) capacitor. If the measured potential difference drops to 100 V..
A hot-air balloon achieves its buoyant lift with heating the air inside the balloon, which makes it less dense than the air outside. Suppose the volume of a balloon is 1600 m3 and the needed lift is 2200 N (rough estimate of the weight of the equipme..
A dragster starts from rest and accelerates down a track. Each tire has a radius of 0.320 m and rolls without slipping. At adistance of 391 m, the angular speed of the wheels is 307 rad/s
A 4.25 bullet traveling horizontally with a velocity of magnitude 375 is fired into a wooden block with mass 1.10 , initially at rest on a level frictionless surface. The bullet passes by the block and emerges with its speed reduced to 110 .
A conducting spherical shell of inner radius b and outer radius c is concentric with a small metal sphere of radius a
A place-kicker must kick a football from a point 36.0 m (about 40 yards) from the goal. Half the crowd hopes the ball will clear the crossbar, what is the initial horizontal position of the football
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