Physics

A uniformly charged insulating sphere with radius r and charge +Q lies at the center of a thin-walled hollow cylinder with radius R>r and length L>2r. The cylinder is non-conducting and carries no net charge.1:Determine the outward electric flux through the rounded "side" of the cylinder, excluding the circular end caps. (Hint: Choose a cylindrical coordinate system with the axis of the cylinder as its z -axis and the center of the charged sphere as its origin. Note that an area element on the cylinder has magnitude dA=2Rdz2:Determine the electric flux upward through the circular cap at the top of the cylinder.3:Determine the electric flux downward through the circular cap at the bottom of the cylinder.4:Add the results from parts A - C to determine the outward electric flux through the closed cylinder.5:What result is expected according to Gauss's law?Note:Express your answers in terms of electric constant 0 and some or all of the variables r, R , L , Q .
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the event horizon of a black hole marks the boundary where the escape velocity reaches the speed of light. calculate the schwarzschild radius for the event horizon of a 2.30 msun black hole.
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which statement is wrong concerning the two tails of a comet? a. they are ion tail and dust tail. b. they are perpendicular to each other. c. dust tail is more massive than ion tail. d. they all pointing away from the sun.
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following is a definition of a widget and a declaration of an array a that contains 10 widgets. the sizes of a byte, short, int, and long are 1,2,4, and 8 bytes, respectively. alignment is restricted so that an n-byte field must be located at an address divisible by n. the fields in a struct are not rearranged; padding is used to ensure alignment. all widgets in a must have the same size. struct widget short s byte b long l int i end widget widget a[10] assuming that a is located at a memory address divisible by 8, what is the total size of a, in bytes? a) 150 b) 160 c) 200 d) 240 e) 320
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what does it mean when i say stream and potential functions are harmonic for a 2d, incompressible, steady flow?
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numerade a 75.0-kg person climbs stairs, gaining 2.50 m in height. find the work done to accomplish this task.
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a microwave oven sets up a standing wave of wavelength 12.2 cm c m between two parallel conducting walls 48.8 cm c m apart. find the wave frequency.
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josh punches his open left hand with his right hand. which statement is true about the forces his two hands exert on each other?
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name the seven major divisions of the electromagnetic spectrum, and give the range of frequencies they encompass.
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what is the magnitude of the apparent weight of a 70 kg astronaut 2600 km from the center of the earth's moon in a space vehicle moving at constant velocity?
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bulb r4 is now removed from the circuit, leaving a break in the wire at its position. what is the current in the bulb r2 ?
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which will have a larger velocity upon hitting the ground: a rock thrown vertically upward from a bridge, or a rock thrown vertically downward from the same bridge? assume both rocks are thrown from the same height and with the same speed.
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over a certain region of space, the electric potential is find the expressions for the x, y, and z components of the electric field over this region. what is the magnitude of the field at the point p, which has coordinates (1, 0, 2) m?
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a battery connected to a resistor r puts out a voltage of 10 volts and a current of 0.5 amps. if instead you connected the battery to a resistor r/2, it would put out:
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A hockey player passes the puck to a teammate by bouncing the puck off the wall of the rink as shown. from physics, the angles that the path of the puck makes with the wall are congruent. how far from the wall will the pass be picked up by his teammate?
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which has a greater (magnitude of) linear momentum: a 1000 kg truck moving at 30 mph, or a 500 kg car moving at 60 mph?
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if a truck has a linear acceleration of 1.85 m/s2 and the wheels have an angular acceleration of 5.23 rad/s2, what is the diameter of the truck's wheels?
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An ice skater is spinning about a vertical axis with arms fully extended. If the arms are pulled in closer to the body, in which of the following ways are the angular momentum and kinetic energy of the skater affected?Angular Momentum Kinetic Energy(A) Increases Increases(B) Increases Remains Constant(C) Remains Constant Increases(D) Remains Constant Remains Constant(E) Decreases Remains Constant
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two students sit on a seesaw in a way that makes it balance and not move. when a third person pushes down on one side, that side moves down. what caused the seesaw to move?
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A) What does the term greenhouse effect mean in relation to the Earth's climate? b) How does atmospheric water vapor affect the climate? (c) The atmosphere naturally contains carbon dioxide. Human activity produces carbon dioxide, for example, when carbon-based fuels are used. What is the reason that the increased concentration of carbon dioxide in the atmosphere changes the climate? d) In climate change, the average temperature is predicted to rise, especially in the polar regions. How can the melting of continental glaciers and sea ice in polar regions accelerate the rise in temperature?
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photo effect: the photo emitting electrode in a photo effect experiment has a work function of 3.56 ev. what is the longest wavelength the light can have for a photo current to occur? state the wavelength in nm units
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How many units of energy are consumed if one uses 10 litres of petrol
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the star sirius is 8.6 light-years from earth (in our earth-based reference frame). suppose you traveled from earth to sirius at 0.92 c . during your trip, how far would you measure the distance from earth to sirius to be?
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define opposition, conjunction, and greatest elongation for planets both closer to and farther from the sun than earth.
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