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Two sinusoidal waves of the same frequency travel in the same direction along a string. If ym1 = 4.8 cm, ym2 = 6.8 cm, ?1 = 0, and ?2 = ?/6 rad, what is the amplitude (in cm) of the resultant wave?
A machine in the factory needs 38 V to operate. The power in the factory is different from that, what is the voltage of the electrical power system in the factory
You want a screen to be illuminated with an intensity of 440 mW/m2. The screen is 12.97 m away from the light source, What is the rms value of the electric field at the screen
Your roommate is an aspiring novelist. Because you are taking physics your roommate asks your opinion on a matter of physics. How many drops per second are keeping the annoyed protagonist awake
Two resistors connected in series have an equivalent resistance of 569.5 Ohms. When they are connected in parallel, Find the resistance of each resistor
A student stands on a platform that is rotating without friction at 1.2 rev/s. His arms are outstretched and he holds a brick in each hand. what is the new angular speed of the system
The burning of gasoline in a car releases about 3 × 10^4 kcal/gal. If a car averages 43 km/gal when driving 90 km/h, which requires 20 hp, what is an efficiency of the engine under those conditions.
Find density of the object
A Michelson interferometer splits a beam of light of unknown wavelength producing a bright fringe (i.e., all of the intensity) at the detector, What is the wavelength of the unknown light
The men's world record for the shot put, 23.12 m, was set by Randy Barnes of the United States on May 20; 1990.If the shot was launched from 6 ft above the ground at an initial angle of 42degrees, what was its initial speed.
A car of mass 1286.6 kg is moving at a speed of 67.6 mph when it misses a curve in the road and hits a bridge piling, how much average power (in watts) is expended in this interval
A car is slides down an icy driveway that slopes at an angle of 20 degrees. What is an acceleration of the car? Assume that the friction between tires and the icy pavement is negligible.
A 1350 kg car accelerates uniformly from 35.5 km/h to 75.5 km/h over 250 m. Determine the time taken for the car to accelerate
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