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A 120-V motor has mechanical power output of 3.00 hp. It is 80.0% efficient inconverting power that it takes in by electrical transmission intomechanical power.a) Find the current in the motor.b) Find the energy delivered to the motor by electricaltrans mission in 3.20 h of operation.c) If the electric company charges $0.160/kWh, what does it costto run the motor for 3.20 h?
A rock is lauched from the moon and travels away from it at a speed of 2/5, Call the event of the rocket's lauching event A, Draw a spacetime diagram of the situation, drawing and labeling the worldlines of the moon
What is change in the car's kinetic energy KEf - KEo from A to B. How fast will the father be moving.
An air parcel with mass = 150 kg is traveling at 15 meters per second due east at 38 degrees North at an altitude of 5500 meters. What is the total force exerted on the air parcel
A stone is thrown diagonally upward witha vertical velocity of 23 m/s and lands 83m away at the sameheight. What was the horizontal velocity
An object is suspended on a frictionless inclined plane by a rope parallel to the incline, as illustrated above. what is the weight of the object
Two kilograms of steam at 2 MPa, 250° C are contained in a rigid vessel. How much heat must be removed from this vessel to cool it to 25° C
A 4 kg blue ball moves to the right at 6 m/s. A 3 kg red ball moves to the left at 7 m/s. How fast and in what direction is the red ball moving
An electromagnetic wave has an electric field strength of 145 V/m at a point P in space at time t. What is the electric field energy density at P
Determine the magnitude of the force between two point charges, Q1 = -2e located at (-3.60 cm, +4.10 cm) and Q2 = -8e located at (-0.60 cm, -8.60 cm).
Suppose your lab partner has a height L of 170 cm (5 ft, 7 in) and a weight w of 680 N (153 lb). find the distance of your lab partner's center of gravity from the left end of the board
Light of wavelength 669 nm is incident on a double slit. The angle between the central bright fringe and the second dark fringe is 4.90°. Determine the separation d of the slits
A skater of mass 81.5 kg initially moves in a straight line at a speed of 5.30 m/s. The skater approaches a child of mass 35.0 kg, what is the skater's final velocity
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