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Birds resting on high-voltage power lines are a common sight. The copper wire on which a bird stands is 2.5 cm in diameter and carries a current of 48 A. If the bird's feet are 4.4 cm apart, calculate the potential difference between its feet. (The resistivity of the wire is 1.7 x10-8 ? · m)
The drill pipe has an outer diameter of 75 mm, a wall thickness of 6 mm, and a weight of 0.8 kN/m. If it is subjected to a torque and axial load as shown, determine the principal stresses and maximum in-plane shear stress
A bat strikes a 0.145-kg baseball. Just before impact, the ball is traveling horizontally to the right at 60.0m/s , Find the vertical component (Fy) of the average force on the ball
The drawing shows two boxes resting on frictionless ramps. One box is relatively light and sits on a steep ramp. find the speed of the lighter box
A boy ties a small stone to one end of a string and holding the other end, he whirls the stone above his head in a horizontal circle. If the stone has a mass of 0.5 kg, find the centripetal force on the stone
A 0.740 m long brass pendulum experiences a 20.0°C temperature increase, Find the ratio of the change in period to the original period, What is the change in the period
An eagle with 1.8m wingspan flaps its wings 21 times per minute, each stroke extending from 42%u2218above the horizontal to 42%u2218 below. What's the average tangential velocity of the wingtip
A 6.0 kg box slides down an inclined plane that makes an angle of 39° with the horizontal. at what rate does the box accelerate down the slope
Consider a regular hexagon of side length, L = 10cm. A charge, Q = 2µC, is located at each vertex, Find the electric field vector at the center
The wheel of the car has a radius of 0.340 m. The engine of the car applies a torque of 282 N•m to this wheel, that does not slip against the road surface. Since the wheel does not slip, the road must be applying the force of static friction to the w..
Calculate the conduction rate of heat H=deltaQ/deltaT through an A=2.0 m^2 glass window of the thickness of the glass is 4 mm and the temperature difference between the inside and the outside is 20 degree celsisus
The pilot of an airplane notes that the compass indicates a heading of due west. find direction (measured from west) of the velocity of the plane relative to the ground
Pulling a car from a ditch, To pull a car from a ditch, the driver ties one end of a rope to the car and the other to a tree 12.5 m away.
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