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A wire of Nichrome (a nickel-chromium-iron alloy commonly used in heating elements) is 1.5 m long and 1.8 mm2 in cross-sectional area. It carries a current of 4.7 A when a 2.0 V potential difference is applied between its ends. Calculate the conductivity of Nichrome.
The potential for a mass hanging from a spring is V(y)=ky^2/2+mgy, when y=0 corresponds to the position of the spring when nothing is hanging from it. Find the frequency of small oscillators around the equilibrium point.
A child sits on the edge of a spinning merry-go-round that has a radius of 2.2 m. The child's speed is 4 m/s. What is the child's acceleration
A projectile is launched at an angle of 60o with respect to the horizontal from the edge of a cliff which is 100 m high. Its initial speed is 30 m/s. find the displacement vector for the motion of the projectile
An automobile having a mass of 1750 kg is placed on a hydraulic lift in a garage. The piston lifting the car is 0.235 m in diameter. What is the force exerted on the small piston
A typical lightning flash delivers about 30C of negative charge from cloud to ground. How many electrons are involved
A 20.0kg light signal hangs from the end of a 7.0m uniform density pole of mass 12.0kg. The pole is free to swivel from the hinge at point A, What is the reaction force (magnitude and direction) at the hinge
A wheel that is rotating at 33.3 rad/s is given an angular acceleration of 1.25 rad/s^2. What is the angular speed after the wheel has turned an angle of 948 rad
A merry-go-round is a common piece of playground equipment. A 3.0-m-diameter merry-go-round with a mass of 230kg is spinning at 17rpm, What is the merry-go-round's angular velocity, in rpm, after John jumps on
What would be apparent speed of the spacecraft image
A hunter aims directly at a target (on thesame level) 130 m away. If the bullet leaves the gun at aspeed of 290 m/s, by how much will it miss the target
A 1000kg weather rocket is launched straight up. The rocket motor provides a constant acceleration for 16s , What is the rocket's speed as it passes through a cloud 4200m above the ground
A rocket is launched at an angle of 56.0° above the horizontal with the initial speed of 101 m/s. The rocket moves for 3.00 s along its initial line of motion with an acceleration of 28.0 m/s2. At this time, its engines fail and the rocket proceeds..
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