Master Physics with Fun Quizzes & Brain Teasers!

callisto, the fourth moon of jupiter's, takes 17 days to orbit jupiter. if i stand on the surface of callisto and see jupiter high in the sky over my head, and then wait 8.5 earth days in the same spot, where will i see jupiter? a. you won't see it; it will only be visible from the other side of callisto b. setting in the west c. overhead, where it was before d. rising in the east e. we need more information to give even a rough estimate of where jupiter will be
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the galileo spacecraft measured that the moon ganymede had a magnetic field, indicating that its interior was at least partly melted and warm. what do scientists think is the most likely reason for this? a. ganymede is so far away from jupiter, it is an independent world, and can compress its core without interference b. ganymede has thousands of volcanoes, which then send material downward to heat up its interior c. ganymede is a relatively small moon, and therefore much easier to heat up than its neighbor moons d. ganymede is heated by tidal forces from jupiter e. scientists have no idea what causes the inner part of ganymede to be warm; this is an unsolved mystery'
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a spring is hanging from the ceiling. attaching a 500 g mass to the spring causes it to stretch 21.0 cm in order to come to equilibrium. part a what is the spring constant? express your answer to three significant figures and include the appropriate units. activate to select the appropriates template from the following choices. operate up and down arrow for selection and press enter to choose the input value typeactivate to select the appropriates symbol from the following choices. operate up and down arrow for selection and press enter to choose the input value type
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The Michelson interferometer can be used to measure the index of refraction of a gas by placing an evacuated transparent tube in the light path along one arm of the device. Fringe shifts occur as the gas is slowly added to the tube. Assume 600-nm light is used, the tube is 5.00 cm long, and 160 fringe shifts occur as the pressure of the gas in the tube increases to atmospheric pressure. What is the index of refraction of the gas? Hint: The fringe shifts occur because the wavelength of the light changes inside the gas-filled tube.
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(a) In a liquid with density 1300 kg/m3, longitudinal waves with frequency 400 Hz are found to have wavelength 8.00 m. Calculate the bulk modulus of the liquid. (b) A metal bar with a length of 1.50 m has density 6400 kg/m3. Longitudinal sound waves take 3.90x10s to travel from one end of the bar to the other. What is Young's modulus Y for this metal (Young's modulus is the equivalent of bulk modulus for metals)
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some of the light also reflects off the surface of the water. if the incident light is initially unpolarized, the reflected light will be unpolarized somewhat horizontally polarized somewhatvertically polarized
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regarding a string with constant tension t and linear density , please calculate the ratio of standing wave frequency between adjacent harmonic modes , , and .
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A 150-ohm resistor is connected in series with a 0.250-H inductor. The voltage across the resistor is V R=(3.80V)cos[(720rad/s)t]. a Derive an expression for the circuit current. b Determine the inductive reactance of the inductor. c Derive an expression for the voltage V L across the inductor.
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55 j of heat energy are transferred to an ideal gas and the gas does 40 j of work. what is the change in thermal energy, in joules?
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what is the average kinetic energy kavgkavgk_avg of the hydrogen molecules at a temperature of 100k100k ? assume that the molecules have only three degrees of freedom at this temperature
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is known to be first order with respect to a and to have a rate constant of .329 at 283 k. an experiment was run at this temperature where [a] = 0.481. calculate the concentration of b after 0.113
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Find a quantitative expression for the thermal equilibrium concentration n = n* = n in theparticle-antiparticle reaction A + A = 0 (For example, electron and hole). Let the mass of either particle be M and spin of the particles are 1/2. The minimum energy release when At combineswith A is A. Take the zero of the energy scales as the energy with no particles present.
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In general, what is the precision of the measurements of T? Answer this question by considering.what percentage is a, of At for the measurements as a whole.
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A 120-kg horizontal beam is supported at the ends a and b. a 350-kg piano rests a quarter of the way from the end a.Part ADetermine the magnitude of the vertical force on the support at A.Express your answer to two significant figures and include the appropriate units.Part BDetermine the magnitude of the vertical force on the support at B.Express your answer to two significant figures and include the appropriate units.
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what is the minimum diameter for an objective lens that will just barely resolve jupiter and the sun? the radius of jupiter's orbit is 780 million kmkm. assume lambda =600nm
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does the amplitude of an lc circuit change after adding a resistance r to the circuit? if yes, how? if no, why not?
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An inductor with L = 9.5 H is in a closed circuit with I = 0.45 A (see the diagram). When the switch is opened, the current goes to zero in t = 0.12 s. Randomized Variables L = 9.5 H I = 0.45 A t = 0.12 sPart (a) Express the magnitude of the average induced emf on the inductor, ave, in terms of L, I and t.ave =?Part (b) Calculate the numerical value of ave in volts.ave =?
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draw a free body diagram of the ball, and explain how the ping pong ball can levitate.
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An electron is at a distance of 0.40 m from a fixed point charge of 6.0 mC. Calculate the electric field strength due to the point charge at the position of the electron The answer is 3.4 108 N C1. How do we achieve the answer?
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If the arm 3 in the following figure rotates at 300 rev/min cow, find the speed and direction of rotation of internal gear 7. 7 1547 40T 361 607 20T 18T Select one: O a. w7 = 324 rev/min Cow O b.wy = 324 rev/min cw O c.wy = 222.1 rev/min cw O d. w7 = 222.1 rev/min cow
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The drawing shows a graph of two waves traveling to the right at the same speed. (a) Using the data in the drawing, determine the wavelength of each wave. (b) The speed of the waves is 12 m/s; calculate the frequency of each one. (c) What is the maximum speed for a particle attached to each wave?
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The figure shows three identical conducting bubbles A, B, and C floating in a conducting container that is grounded by a wire. The bubbles initially have the same charge. Bubble A bumps into the containers ceiling and then into bubble B. Then bubble B bumps into bubble C, which then drifts to the containers floor.When bubble C reaches the floor, a charge of -3e is transferred upward through the wire, from the ground to the container, as indicated. (a) What was the initial charge of each bubble? When (b) bubble A and (c) bubble B reach the floor, what is the charge transfer through the wire? (d) During this whole process, what is the total charge transfer through the wire?
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Three identical very dense masses of 7100 kg each are placed on the x axis. One mass is at x1 = -130 cm , one is at the origin, and one is at x2 = 360 cm .What is the magnitude of the net gravitational force Fgrav on the mass at the origin due to the other two masses? Take the gravitational constant to be G = 6.67*1011N.m2/kg2.
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which statement best describes the cause of this relationship between the luminosity of an agn and the luminosity of a normal galaxy?
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