Physics, 29.06.2019 18:20, nuggetslices
Commercial airplanes are sometimes pushed out of the passenger loading area by a tractor. (a) an 1800-kg tractor exerts a force of 1.75×104 n backward on the pavement, and the system experiences forces resisting motion that total 2400 n. if the acceleration is 0.150 m/s2 , what is the mass of the airplane? (b) calculate the force exerted by the tractor on the airplane, assuming 2200 n of the friction is experienced by the airplane. (c) draw two sketches showing the systems of interest used to solve each part, including the free-body diagrams for each
Answers: 1
Physics, 21.06.2019 16:00, amoryfe28p0vpwo
Lets say that an object of a certain volume has a certin mass. what happens to its mass when you double its volume?
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What would the difference of spectral lines emitted by hydrogen gas in distant galaxies which is normally found at a wavelength of 21 cm on earth, be observed at 21.1 centimeters?
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Physics, 22.06.2019 01:30, romanlittlewood
For problems 1-3, consider a simple dc brush motor with a permanent magnet stator. with an an consider a simple dc brush motor with a permanent magnet ae supply voltage of 100 v, the no-load speed of the motor is 1000 rpm. this motor can provide a torque of 1.9 n-m at 800 rpm drawing a current of 2 a current are both zero at no load.) 1. with an armature supply voltage of 100 v, the motor is operated at 900 rpm. what is the motor torque? what is the mechanical power delivered by the motor? what is the current draw? what is the electrical power input? what is the energy efficiency of the motor? with an armature supply voltage of 100 v, the motor is operated at 1100 rpm (where it acts as a generator). what torque input is required? what mechanical power is required what current is generated? what is the electrical power generated? what is the energy efficiency of the motor acting as a generator? 2. with an armature supply voltage raised to 120 v, the motor is operated at 1000 rpm. what is the no-load speed? what is the motor torque? what is the mechanical power delivered by the motor? what is the current draw? what is the electrical power input what is the energy efficiency of the motor? 3.
Answers: 3
Commercial airplanes are sometimes pushed out of the passenger loading area by a tractor. (a) an 180...
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