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Determine the resultant velocity of an airplane that normally flies at 200 k/h if it encounters a 50 km/m tailwind if it encounters a 50 km/h headwind.
a 120-v motor has mechanical power output of 3.20 hp. it is 91.0 efficient in converting power that it takes in by
q1. a 170 g block hangs from a spring with spring constant 9.0 nm. at t0 s the block is 24 cm below an equilibrium
A ball of mass 0.45 kg is traveling with a velocity of 1.2 m/s north, 2.4 m/s east and 0.6 m/s up. What is the angular momentum of the ball with respect to the point at which the rope is attached to the post
A stunt man drives a car at a speed of 20m/s off a 30-m-high cliff, How far from the base of the cliff does the car land and What is the car's impact speed
A thin film of oil (n=1.24) is laying on a flat piece of glass (n=1.83). When viewed through air normal to the oil film, What is the minimum thickness of the oil film
A curve in a highway has radius of curvature 110 m and is banked at 3.4°. On a day when the road is icy, what is the safest speed to go around the curve
A toy cannon uses a spring to project a 5.80 g projectile. The spring is originally compressed with 8.00 cm and has a force constant of 15.54 N/m. When the spring is released, the projectile slides 15.0cm during the barrel of the cannon where the bar..
A ball of mass m is dropped from a height h above the ground. Calculate the speed of the ball at height y if at the instant of release it already has an initial speed of vo
At 0.0° C and 1.00 atm, 0.80 mol of a gas occupies a volume of 0.0179 m3. Estimate the average distance between the gas molecules
how much tension must a cable withstand if it is used to accelerate a 20.0 kg car vertically upward at 0.70 m/s^2
After the collision, the blue puck has a velocity of 2i – 2j m/s. Illustrate what is the velocity of the gold puck after the collision?
What is the percent change in momentum of a proton that accelerates from 0.42c to 0.91c?0
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