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An electricity generating station has a rated output of 300 megawatts. Given that the station heat rate is 12 000kJ/kW-h, and the coal used has a heat value of 23 000kJ/kg, find the minimum possible belt-drive power required for the bunker coal conveyor in order to keep the boiler supplied when the station is on full load. The conveyor is to rise 15 m at an inclination of 18 degrees to reach the bunkers. The belt runs at 3.5 m/s and the mass of belt used in 7.5kg/m.
a world-class sprinter can burst out of the blocks to essentially top speed of about 11.5 ms in the first 15.0m of the
A generator uses a coil that has 490 turns and a 0.75 T magnetic field. The frequency of this generator is 60.0 Hertz, find the length of the wire from which the coil is made
The power supply for a pulsed nitrogen laser has a 0.0050-mF capacitor with a maximum voltage rating of 30 kV, calculate the power of the laser pulse
A proton moving at 106 m/s suddenly enters a repelling electric field of magnitude 104 N/C. How far does the proton travel before stopping
An 8-kg box is pushed 15 m across a level floor by a constant 15.7-N applied force. Assuming the box starts from rest, what is the final velocity of the box at the 15-m point
Find the equation for the acceleration of the moving body at any time.
A person uses corrective glasses of power -8.5 D. If the glasses are worn 2.0 cm from the eye, what is the person's far point without glasses
An organ pipe is 107 cm long. What is the third audible harmonic if the pipe is closed at one end? The speed ofsound in air is 343m/s
Two sides of a triangle are 16.9 cm and 29.5 cm, with tehincluded angle 113o. What is the length of the thirdside? Answer in units of cm. What is the angle opposite the side16.9 cm? Answer in units of o.
During a tennis serve, a racket is given an angular acceleration of magnitude 160 rad/s2. find the magnitude of the total acceleration of the top of the racket
If the range of discharge times that can be handled effectively is from 10.0 μ s to 6.00 ms, illustrate what should be the (a) lower value and (b) higher value of the resistance range of the resistor?
in a little league baseball game the 145 rm g ball enters the strike zone with a speed of 15.0 rm ms. the batter hits
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