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A cylindrical copper rod has resistance of 0.3 ohm. It is reformed to 3.8 timesm its original length with no change of volume. What is its new resistance in ohms?
Hans and Franz pick up the 2.0m long garden. The chair weights 200 N and the center of gravity is 80 cm from Hans end. How much weight does Hans have to lift
two children are playing a game in which they try to hit a small box on the floor with a marble fired from a spring-loaded gun that is mounted on a table. How far should Rhoda compress the spring to score a direct hit
A force FT is applied to a cord wrapped around a pulley with moment of inertia I = 0.295 kg · m2 and radius R0 = 33.0 cm, what is the linear speed of a point on its rim 7.0 s later
The radius of the tires on your car is 0.33m. You drive 1400 m in a straight line. What is the angular displacement of a point on the outer rim of a tire, around the center of tire, during this trip? Suppose the tire rotates in the counter clockwise ..
An elevator (mass 4600 ) is to be designed so that the maximum acceleration is 0.0650 What is the maximum force the motor should exert on the supporting cable
Assume all angles to be exact. A certain crystal gives a deflection angle of 25 degree for the first-order maximum of monochromatic X-rays with a frequency of 4.5×10^17
The speed of light in a certain medium is 2.2E10^8 m/s. What is the index of refraction of this medium
An astronaut on the Moon drops a rock straight downward from a height of 1.50m. what is the speed of the rock just before it lands
A 2.0-kg object is attached to a spring (k=55.6 N/m) that hangs vertically from the ceiling. obtain the magnitude of the maximum acceleration of the object
A ball is thrown upward from a platform 4.6 m high with a speed of 16 m/s, What is the magnitude of its velocity when it hits the ground
question1batman whorsquos mass is 110 kg is holding on to free end of a 5.08 m rope other end of which is fixed to a
Consider two points charges held fixed at locations along the x-axis. Charge q1= 5.00mC is located at x1= 1.00m. Charge q2= -5.00 mC is located at x2=4.00m. calculate the magnitude and direction of the electrostatic force
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