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A coal power plant with 30% efficiency burns 10 million kilogramsof coal a day. (take the heat of combustion of coal to be 30MJ/kg)a) What is the power output of plant? (I am using part of theefficiency of the plant?)b) At what rate is thermal energy being discarded by this plant?
A 125.2 carton is pulled up a frictionless baggage ramp inclined at 31.0 above the horizontal by a rope exerting a 75.2 pull parallel to the ramp's surface. What is the net work done on the carton
A transverse periodic wave described by the expression y= 5sin(pi*x/3 - 30*pi*t) is established on a string. What is the length in meters of the string
the longitudinal vibrations of a bridge are to be modeled as a single-degree-of-freedom system. the mass of the bridge
two objects are connected by a light string that passes over a frictionless pully, find the magnitude of the acceleration of the suspended block as it falls
A compound microscope in which the objective and eyepiece are 30.2 cm apart uses an objective lens with fobj = 1.0 cm, What is the magnification of the microscope
A flagpole of length 9 m and mass 35 kg is hinged at one end, where it is connected to a wall as sketched below. The pole is held up by a cable attached to the end. Find out the tension in the cable. (Assume the flagpole has an uniform mass distr..
A man enters a tall tower, needing to know its height. He notes that a long pendulum extends from the ceiling almost to the floor and that its period is 27.5 s. How tall is the tower
By what factor must the mass of the ice be increased if the system is to have the same final temperature?
A 0.14 kg baseball moves horizontally with a speed of 27 m/s toward a bat. find magnitude of the impulse delivered to the ball by the bat
A 7.50-nC charge is located 1.80m from a 4.20-nC charge, find the magnitude of the electrostatic force that one particle exerts on the other
q1. a 1.50 kg object is held 1.20 m above a relaxed massless vertical spring with a force constant of 310 nm. the
A spacecraft is in orbit around a planet. The radius of the orbit is 2.9 times the radius of the planet (which is R = 71474 km). What is the period of the spacecraft's orbit
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