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A spring with spring constant 18N/m hangs from the ceiling. A 580g ball is attached to the spring and allowed to come to rest. It is after that pulled down 8 cm and released.
Three single-phase step-up transformers rated at 10MVA, 4.6kV/13.8kV are connected in Wye-Delta configuration. The three transformers are used to feed a 20MVA load at 0.9 p.f. With an efficiency of
Draw per-phase equivalent circuit of the power system showing all reactances in per unit and show the base voltages used at various parts of the network. Use 10 MVA and 12 kV as base
A three-phase transmission line is 200 km long. It has a total series impedance of ( 25 + j110) Ω per phase and a total shunt admittance of j5 X 10-4 Ω-1. It delivers 18
Air at 1 ATM and 80 °C is fed to a chiller. The air contains water vapor at 15 degrees of superheat. The air stream is chilled to condense 50 percent of the water in the feed.
Two matching speakers are driven by the same oscillator at 200Hz. They are located on a vertical pole and 4.00 m apart. A man walks straight towards the lower speaker perpendicular to the pole.
A rectangular strain gage rosette attached to an aluminum surface comprises 3 identical gages (gage factor = 2.1) of nominal resistance 200 ohms are associated into a Wheatstone bridge having 3 othe
A 0.30 m radius automobile tire accelerates from rest at a constant 2.0 rad/s2. What is the centripetal acceleration of a point on the outer edge of the tire after 5s.
A horizontal force of 200N is applied to a 55 kg cart across a 10 m level surface. If the cart accelerates at 2.0 m/s2, then what is the work completed by the force of friction as it acts to retard
Find out the tension in an elevator cable if the 1 .000 kg elevators is descending with an acceleration of 1.8 m/s2, downward.
Find acceleration of the moving point. A point moves along x-axis with its position, x, at time t given by x(t) = t3 - 3t2 + 2t - 1.
An object at rest explodes into three pieces of equal masses. one moves east at 23 m/s, while the second piece moves northwest at 14 m/s. What is the velocity of the third piece.
A bird, accelerating from rest at a constant rate, experiences the displacement of 28 m in 11 s. What is an average velocity.
A spherical Balloon is inflated at the rate of 144pie cubic inches per minute (in^3/min). How fast is the radius of the balloon changing when the radius is 4 inches? Recall the formula for volume of
A 60.0 kg skater begins a spin with the angular speed of 6.00 rad/s. By changing the position of her arms, the skater decreases her moment of inertia by 50%. What is the skater's final angular speed
By how much does the car body sag on its suspension when these three additional passengers get in.
An object at rest explodes into three pieces of equal masses. One moves east at 23 m/s, While the second piece moves northwest at 14 m/s. What is the velocity of the third piece.
A 2.00 kg ball swings in a vertical circle on the end of an 80 cm long string. The tension in the string is 20 N while its angle from the highest point on the circle is q= 300.
If the coefficient of kinetic friction between the box and the roof is 0.55, with what speed should you push the box to have it gently come to rest right at the edge of the roof.
An arrow is shot vertically upward. Its height p in feet above the ground after t seconds is given by p(t) = -16t2 + 160t + 384. How long does it take to reach its highest point.
Presume the square wire loop is replaced with a smaller one, made of the same wire that is 0.02 m on a side, half as long as the original. Circle the choice that would make each of the following sta
A rectangular loop of wire is placed midway between two long straight parallel conductors, as shown. The conductors carry currents i1 = 10 A and i2 = 20 A in a direction as indicated.
The diagram on the left below shows two resistors in series with an ideal battery, in the diagram on the right; a third resistor has been added in parallel with R2. The three resistors show all have
A fire in an enclosure has reached flashover, and the gas temperature is assumed to be uniform at 1000 o C. The enclosure has an opening 3 m wide and 2 m high. Work out (a) the position of the neu
In order to catch a ball, a baseball player extends the hand forward before impact with the ball and then lets it ride backward in the direction of the ball's motion.