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The voltage from a wall plug can be described by the equation V(t)=170sin[2π(60Hz)t] V. What would you read on a DMM reading AC voltage?? 1. None of the above. 2. 240 V 3. 0 V 4. 120 V 5. 170 V
a supertanker with the mass of 3.34^7 kg is moving with a constant velocity .its engines generate a forword thurst of 5.38x10^5 n. determine the magnitude of the upward buoyant force exerted on the tanker by the water
A flight attendant pulls her 61N flight bag a distance of 279m along a level airport floor at a constant velocity. The force she exerts is 41N at the angle of 50° above the horizontal.
A blow-dryer and a vacuum cleaner each operate with a voltage of 120 V. Determine the ratio of the energy used by the blow-dryer in 17 minutes to the energy used by the vacuum cleaner in 46 minutes
An athlete training for an event does 6.53 104 J of work during a workout and gives off 6.17 105 J of heat, Determine the magnitude of the change in internal energy of the athlete
A solenoid is designed to produce a 2.74*10^-2T magnetic field near its center. It has a radious of 1.25cm and a length of 45.0 cm, how many turns must the solenoid have
Light from a helium-neon laser (?=633nm) is used to illuminate two narrow slits. What is the spacing (in mm) between the slits
A piece of thin spherical shell that has a radius of curvature of 90 cm is silvered on both sides. How far was the mirror moved
the light intensity incident on a metallic surface with a work function of 1.17eV produces photoelectrons with maximum kinetic energy of 4.17eV. what is the maximum kinetic energy of the photoelectrons
An electromagnetic wave in a vacuum has a magnetic field with a magnitude of 1.27 × 10-6 T. What is the intensity S of the wave
The acceleration as a function of time of a mass-spring system is given by a=(0.70m/s^2)sin[(3rad/s)t]. a)If the spring constant is 20N/m, what is the amplitude? b)What is the initial velocity? c)what is the mass of object?
A runner covers one lap of a circular track 40.0m in diameter in 63.5s a) average speed for that lap? b) average velocity for that lap? c) If she covered the first half-lap in 28.6s , what was her average speed for that half-lap?
A 58 ice cube can slide without friction up and down a 28 slope. The ice cube is pressed against a spring at the bottom of the slope, When the ice cube is released
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