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An RC circuit consisting of a 150 μF capacitor and a 1 MΩ resistor is connected to a 100-V battery for a long time, and then the battery is shorted. After 30 s, a second identical resistor is placed in parallel with the original. What is the voltage across the capacitor 30 s after this?
A 10-kg projectile launched over level ground has three times the kinetic energy at the moment of its launch as it does at its peak height. Find its impact velocity
A hand help shopping basket 62.0 cm long has a 1.81 kg carton of milk at one end, and a 0.722 kg box of cereal at the other end. Where should a 1.80 kg container of orange juice be placed so that the basket balances at its center?
A series RLC ac circuit has a capacitive reactance of 55 ?, and inductive reactance of 25 ?, and a resistance of 40 ?. What is the phase angle of this circuit
An 800-N billboard worker stands on a 4.0-mscaffold supported by vertical ropes at each end. what is the tension in the rope nearest the worker
a 137cs source has an activity of 700 microci. a gamma photon with energy 0.662 mev is emitted with a frequency of
Ultrasound is the name given to frequencies above the human range of hearing, which is about 20000 {rm Hz}. Waves above this frequency can be used to penetrate the body and to produce images by reflecting from surfaces.
Robert has just bought a new model rocket, and is trying to measure its flight characteristics. how much work is done by the drag force on the rocket during its ascent
A 0.060 kg tennis ball, moving with a speedof 4.50m/s, Assuming a perfectly elastic collison, determine the speed and direction of each ball after the collision
A paddle wheel frictionally adds thermal energy to an ideal monatomic gas in a sealed, insulated container. The paddle wheel is driven with a cord connected to a falling object as shown in the drawing. In this experiment, a 5.0-kg object falls during..
A 26 Newton block rests on a horizontal surface. The coefficients of kinetic and static friction between the surface and the block are 0.4 and 0.7, correspondingly. Find the force of friction acting on the block if the tension is14 Newton
A dockworker loading crates on a ship finds that a 17 kg crate, initially at rest on a horizontal surface, requires a 83 N horizontal force to set it in motion. Find the coefficients of static and kinetic friction between crate and floor
The wheel in the figure has eight equally spaced spokes and a radius of 34 cm. It is mounted on a fixed axle and is spinning at 2.1 rev/s. What minimum speed must the arrow have
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