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Q. An airplane has an effective wing surface area of 22.4 m2 that is generating the lift force. In level flight the air speed over the top of the wings is 55.0 m/s, while the air speed beneath the wings is 31.0 m/s. What is the weight of the plane?
Q. A 0.157 kg ball is thrown straight up from 1.94 m above the ground. Its initial vertical speed is 9.60 m/s. A short time later, it hits the ground. What is the total work done by the force of gravity during that time?
What lengths of ship three sides according to the observer
How various meters away is a cliff if an echo is heard 0.475 s after the original sound? Assume that sound traveled at 343 m/s on that day.
Quadrupole moments in the shell model
A jeweler working awith a heated 47 g gold ring must lower the ring's temperature to make it safe to handle. If the ring is initially at 99 C, what mass of water at 25 C is needed to lower the rings temperature to 38 c.
With what minimum speed should you toss a 140g ball straight up to hit the 11.0m-high roof of the gymnasium if you release the ball 1.30m above the ground? Resolve this problem using energy.
A 53 kg skier skis directly down a frictionless slope angled at 12° to horizontal. Choose the positive direction of the x axis to be downhill along the slope.
A 20 g ball is fired horizontally with initial speed v_0 toward a 110 g ball that is hanging motionless from a 1.10 m-long string. The balls undergo a head-on, perfectly elastic collision, after which the 110 g ball swings out to a maximum angle t..
Computing the kinetic energy, takeoff speed, and kinetic energy per kilogram.
A wrench 0.3 meters long lies along the positive y-axis, and grips a bolt at the origin. A force is applied in the direction of langle 0, 1, 2rangle at the end of the wrench. Find out the magnitude of the force in newtons needed to give 100 newton..
When two point charges are a distance R apart, their potential energy is -2.00 .How far (in terms of R) should they be from each other so that their potential energy is -6.00.
Evaluate the stability of of Na in the NaCl structure
A pipe open at one end has a fundamental frequency of 256 Hz. A second pipe,identical to first pipe, is shortened by cutting off a portion of the open end. When both pipes vibrate at their fundamental frequencies, a beat frequency of 12 Hz is heard..
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