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1) What is the rms current in an RL circuit when a 60.0Hz 240V rms ac voltage is applied, where R = 2.00k? , and L = 710mH ?
2) What is the phase angle between voltage and current?
3) What are the rms voltage readings across R and L?
A 40 kg crate is pulled across the ice with a rope. A force of 100 N is applied at an angle of 30 degrees with the horizontal. Neglecting friction.
Light from a laser beam with a wavelength of 600 nm passes through a narrow single slit and observed on a screen 1.5 m behind the slit. The first minimum of the diffraction pattern is 1.5 cm from the central maximum. How wide is the slit?
A ray of light incident upon a mirror makes an angle of 42 with the mirror. What is an angle between the incident ray and the reflected ray.
If so how fast will the cars be traveling when they collided? If they did not, what is a distance between the cars at this point.
The electric potential difference between two infinite, parallel metal plates is V. If the plates are separated by a distance L = 4.50 mm and the electric field between plates is E = 270 V/m, what is V.
A trombone has an effective length of 160 cm and the speed of sound in air is 345 m/s. Notes are selected by moving a U-shaped tube in or out to change effective length of the trombone.
A 23 kg body is moving in the direction of the positive x axis with a speed of 292 m/s when, owing to an internal explosion, it breaks into three pieces.
A solenoid made out of 3500 turns of a fine silver wire about a tube 1cm in radius has a potential drop of 3.2V at a current of 2A in the lab. What is the cross-sectional area of the wire
A cube of ice is taken from the freezer at -8.0 and placed in a 113 aluminium calorimeter filled with 306 of water at room temperature of 20.0. The final situation is observed to be all water at 15.0.
An ideal gas occupies 0.14 m3 at an absolute pressure of 1.2×105 Pa and temperature 280 K, How many moles of gas are there
A football spends a total of 5 seconds in the air. It reaches a peak height of 30 meters. How long does it take to reach its peak height? The football has the range of 90 yards. What is its horizontal velocity.
A force vector has a magnitude of 577 newtons and points at an angle 43o of below the positive x axis. What is (a) x scalar component and (b) y scalar component of the vector.
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