Physics

A power plant involves thermodynamic cycles to generate electrical power. In the first stage, water is pumped under saturated conditions from a pressure of 0.7 bar to 30 bar. Water then goes to the boiler at constant pressure and leaves the boiler at 500C. In this condition, the steam is then expanded isentropically in a steam turbine so that the pressure returns to 0.7 bar and is cooled in a condenser. Determine: a) Pump work b) The incoming heat is given to the boiler c) Turbine work d) The heat removed by the condenser e) Cycle thermal efficiency
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A harp string has a length of 30.5 cm and vibrates with a node at each end and an antinode inthe center. If its frequency is 440 Hz, find (a) the wavelength and (b) the speed of the waves on the string.
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Someone help me asp!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Which type of electron occupies the outermost energy level or shell of an atom? A. ionization electronB. Lewis dot electron C. valence electronD. reacting electron
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The image below is a sketch of two-slit diffraction of light. Narrow slits at A and B act as wave sources, and waves interfering in various phases are shown at C, D, E, and F.
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you are at the front of a floating canoe near a dock. you jump, expecting to land on the dock easily. instead you land in the water. explain.
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how many kwh k w h of energy does a 600- w w toaster use in the morning if it is in operation for a total of 6.0 min m i n ?
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Express your answer with the appropriate units. A 60.0 kg box hangs from a rope. What is the tension in the rope if:A. The box is at rest?B. The box moves up a steady 4.80 m/s ?C. The box has vy = 5.00 m/s and is speeding up at 5.40 m/s^2 ? The y axis points upward.D. The box has vy = 5.00 m/s and is slowing down at 5.40 m/s^2 ?
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Find the work done in moving a particle from P to Q if the magnitude and direction of the force are given by v.P(2,9), Q(12,8), v=3i-6j
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suppose a 20.0-kg monkey climbs a vine. what is the tension in the vine if they climbs at a constant speed?
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Two asteroids are suspended in space 50 meters apart. The masses of the asteroids are 2000000 kg and3000000 kg.
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An 82.0-kg person rides on a carnival ride in a 45.0-kg basket supported by a single chain. When the ride reaches its top speed, the basket moves at a constant speed in a horizontal circle with a radius of 7.10 m. At this point, the chain supporting the basket is at a 45.0 angle to the vertical. A)At top speed, how large are the vertical and horizontal components of the tension in the chain? (Hint: The vertical component of the tension equals the weight it supports.) B) What is the magnitude of the centripetal acceleration of the basket and its passenger? C) What is the speed of the basket and its passenger? D) How long does it take the basket to make one complete circle?
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what is the equation to find the equivalent resistance, req, of two resistors in series, r1 and r2? group of answer choices
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the two regions of the electromagnetic spectrum where the earth's atmosphere is transparent (radiation can get in) are visible light and:
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which of the following is true about a comet that is on an elliptical orbit around the sun? question 24 options: the comet's speed is greatest when it is farthest from the sun. the comet's speed is greatest when it is nearest the sun this comet's speed is zero. the comet's speed is constant because its mass and the sun's mass stay approximately the same
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an object is launched at a velocity of 40m/s in a direction making an angle of 50upward with the horizontala)what is the maximum height reached by the objectb) what is the object total flight time between launch and touching the groundc) what's the object horizontal range(maximum above ground)
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what is the value of the acting force between the coils if current is 30 a, separation between the coils is 5 cm, and the radius is 50 cm
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) now you will start taking data with the magnetometer. select the magnetometer sensor and start recording data. un-check the bx and bz boxes so that only the by trace is being displayed on the chart. stand several feet away from anything metallic or magnetic and point the y-axis of the iolab in different directions (forward, backward, up, down, left, right, etc) and find the orientation of your iolab for which its measurement of by has the biggest value. what does this tell you about the direction of the earths magnetic field in your location?
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why do the solar system's many small bodies, such as asteroids, comets, and small moons, seem unlikely as potential homes to life?
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the current in the circuit will approach a constant value ic after a long time (as t tends to infinity). what is ic ? express your answer in amperes.
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a square in plastic with 10 cm length is charged uniformly with an extra 1011 electrons. what is the electric field 1.0 mm above the surface at a point near the center?
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an elevator suspended by a cable is descending at constant ve-locity. how many force vectors would be shown on a free-body diagram? name them
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a woman stands on a scale in a moving elevator. her mass is 61.8 kg, and the combined mass of the elevator and the scale is 816 kg. starting from rest, the elevator accelerates upward. during the acceleration, the hoisting cable applies a force of 9300 n. what does the scale read (in kg) during the acceleration?
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in which disorder of the eye does the optic axis become too long, resulting in the light coming to a focus in front of the retina?
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a person whose weight is 509n is being pulled up vertically by a rope from the bottom of a cave that is 33.1m deep. the maximum tension that a rope can withstand without breaking is 571n. what is the shortest time, starting from rest, in which the person can be brought out of the cave?
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