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An airplane is traveling at 117 mph (relative to the air), 13 degrees E of N, at an altitude of 5000 ft. It encounters a cross-wind, blowing 16 m/s (relative to the earth) @ 39 degrees S of W. At what velocity must the plane fly (relative to earth) to maintain her original heading?
A blackened, solid copper sphere that has a radius equal to 2.5 cm hangs in an evacuated enclosure whose walls have a temperature of 29°C. find the initial rate at which its temperature changes
A particle of charge Q is fixed at the origin of anxy coordinate system. At t = 0 a particle(m = 0.776 g, q = 5.04 µC is located on thex axis at x = 18.7 cm, moving with a speed of39.8 m/s in the positive y direction.
Water is being sprayed from a nozzle at the end of a garden hose of diameter 2.0 cm. what is the speed of the water inside the hose
A 130 horizontal beam is supported at each end. A 310 piano rests a quarter of the way from one end. What is the vertical force on each of the supports
Two in-phase speakers 2.0 m apart in a plane are emitting 1800 Hz sound waves into a room where the speed of sound is 340m/s . Is the point 4.0m in front of one of the speakers, perpendicular to the plane of the speakers, a point of maximum constr..
A 62.0 kg bungee jumper jumbs from a brigde. She is tied to a bungee cord whose unstretched length is 12.0 m, and falls a total of 31.0 m. Calcule the spring constant k of the bungee cord
A student sits on a rotating stool holding two 2.9-kg objects. When his arms are extended horizontally, the objects are 1.0 m from the axis of rotation and he rotates with an angular speed of 0.75 rad/s, Find the new angular speed of the student
The four particles form a square of edge length a = 4.90 cm and have charges q1 = 6.40 nC, q2 = -6.17 nC, q3 = 8.41 nC, and q4 = -8.40 nC. What is the magnitude of the net electric field produced by the particles at the square's center?
If the range of discharge times that can be handled effectively is from 10.0 μ s to 6.00 ms, illustrate what should be the (a) lower value and (b) higher value of the resistance range of the resistor?
A firefighter standing on a ladder 4.20 meters in the air is using a water hose to put out a fire. How much work is done per minute in lifting the water from the ground
A soldier has a huge contraption that notches a large 4 kg arrow (it looks more like a lance) in a massive bow and uses a winch system to draw the arrow back to set the bow. What is the speed of the arrow
The peak value of the ac current in a circuit is 6.0 A, and peak value of the ac voltage applied to the circuit is 4.7 V. What is the average power delivered to the circuit?
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