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What is the rms current in an RL circuit when a 60.0Hz 240V rms ac voltage is applied, where R = 1.80k? , and L = 420mH?
What is the phase angle between voltage and current?
What are the rms voltage readings across R and L?
A mass of 1.7kg stretches a vertical spring 0.313 m. If the spring is stretched an additional 0.13m and released, how long does it take to reach (new) equilibrium position again.
A block is attached to a ceiling by a spring of force constant k. When pulled down and released, what is the force constant k of the spring
A thin, horizontal, 10-cm-diameter copper plate is charged to 3.5nC. If the electrons are uniformly distributed on the surface, what are the strengths and direction of the electric field
Suppose a 76 kg person hangs vertically from a nylon rope. What radius must the rope have if its fractional enhancement in length is to be the similar as that of the spider's thread.
If the proton is fired at a speed of 3.0×107m/s , what is its closest approach to the surface of the nucleus? Assume the nucleus remains at rest
Then, a thin conducting wire connects the spheres, redistributing the charge on each sphere. When the wire is removed the spheres still repel but with a force of F2 = 0.100 N. Using this information, find the initial charge on each sphere, q1 and ..
A ball of mass 20 kg moves with a velocity of 2 m/s along the +x axis (call it ball A). It collides with a ball of mass 12 kg which is initially at rest (call it B), What is the final velocity of ball B
Carry out the following arithmetic operations: (a) sum of the measured values 756, 37.2, 0.83 and 2.5. The answer must be in significant digits. Since 2.5 and 0.83 have two significant digits, shouldn't the answer be 800 instead of 797.
You are driving to grocery store at 21. You are 100 from an intersection when the traffic light turns red. Presume that your reaction time is 0.75 and that your car brakes with constant acceleration. How far from the intersection are you when you ..
Two current-carrying wires are exactly parallel to one another and both carry 3.5 A of current, What is the direction of the magnetic force caused by wire 2 on wire 1
A 6.2\({\rm ft}\) tall shopper in a department store is 18\({\rm ft}\) from a convex security mirror, What is the mirror's radius of curvature
The coefficients of static and kinetic friction between a 67 kg box and a horizontal surface are 0.56 and 0.32, respectively. Illustrate what is the acceleration of the object if a 335 N horizontal force is applied to the box?
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