Master Physics with Fun Quizzes & Brain Teasers!

what is the frequency of electromagnetic radiation with wavelength 532 nm? (c = 3.00 108 m/s)
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if the magnitude of the magnetic field is plotted versus electric current, what is the meaning of the slope?
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In details please 10.7. Water droplets are to be separated from air in a simple separation drum The flow rate of the air is 1000 m/h,at stp,and it contains 75 kg of water The drum will operate at 1.1 bara pressure and 20C. Size a suitable liquid-vapor separator.
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when a nebula contracts a ___ forms at the center and emits ___ energy
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In words, explain the Lawson criterion and its significance. a)One needs high densities for extended time periods to produce enough energy for fusion reactions to break even. b)One needs high densities for short time periods to produce enough energy for fusion reactions to break even. c)One needs low densities for extended time periods to produce enough energy for fusion reactions to break even. d)One needs low densities for short time periods to produce enough energy for fusion reactions to break even
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if a diver who is underwater shines a flashlight upward, toward the surface, at an angle of 28 degrees from the normal, at what angle does the light emerge from the water?
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A beam of laser light of wavelength 632.8nm falls on a thin slit 0.00375mm wide. After the light passes through the slit, at what angles relative to the original direction of the beam is it completely cancelled when viewed far from the slit?
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Consider a single slit that produces its first minimum at 59 for 620 nm light.
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When a moving object reflects sound back to a stationary source of frequency f, two Doppler shifts of this frequency occur - when the object receives the sound and when it reemits it. If the object's speed, u, is much smaller than the sound speed, v, the net Doppler frequency shift, f, simplifies to ff2u/v. Calculate this shift for a blood flow of 12.9 cm/s interrogated by a 7.40MHz signal.
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A gas occupies a volume of 35.9 ml at a temperature of 22.0 C. What volume will the same gas occupy at a temperature of 28.0 C?
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Boiler monitor: Over the following three chapters, we will create an app that monitors the temperature and pressure of a boiler. You can model the app based on the Thyroid app. In this chapter, we will create the skeleton of the app, similar to the Thyroid app. Now, just create the pages and the links to navigate between them; you will implement the functionality of the pages in later chapters. The app will have
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An ultrasound wave travels form soft tissue into bone. Some of the wave is reflected, some is transmitted.What waves will experience a phase shift? (A) Both waves (B) Only the transmitted wave (C) Only thereflected wave (D) None of the waves
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ou are asked to design a retro-reflector using two mirrors that will reflect a laser beam by 180 independent of the incident direction of the beam. what should be the angle between the two mirrors?
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an electron and a proton are fixed at a separation distance of 949949 nm. find the magnitude e and the direction of the electric field at their midpoint.
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A hollow conducting sphere has an inner radius of r1 = 1.5 cm and an outer radius of r2 = 3.5 cm. The sphere has a net charge of Q = 1.7 nC. What is the magnitude of the field, in newtons per coulomb, at a distance r = 8.6 m away from the center of the sphere?
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an aluminium wire of length 1.0 meter has a resistance of 9 * 10^-3 ohm. if the wire were cut into two equal lengths, each length woul dhave a resistance of
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Melanie kept a potted in closed box with a hole on one side as shown in the diagram above. Which change would she MOST LIKELY observe in the part after a few daysA.The plant continues to grow in the same directionB.The roots bend toward the hole in the side of the boxC.The leaves will turn away from the hole in the side of the boxD.The stem bends toward the hole in the side of the box
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Object O stands on the central axis of a convex mirror. An object is located 52.2 cm in front of the mirror. The distance between the focal point and the mirror is 25.2 cm. What is the radius of curvature r (including sign) for this mirror?What is the image distance i?What is the lateral magnification m?Also determine, whether the image is real or virtual, upright or inverted, and on the same side of the mirror as O or on the opposite side. Check all statements that are true.Select all that are True.
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Prior to the music CD, stereo systems had a phonographic turntable on which vinyl disk recordings were played. A particular phonographic turntable starts from rest and achieves a final constant angular speed of 33 1/3 rpm in a time of 4.5 s. How many rotations did the turntable undergo during that time? The classic Beatles album Abbey Road is 47 min and 7 s in duration. If the turntable requires 8 s to come to rest once the album is over, calculate the total number of rotations for the complete start-up, playing, and slowdown of the album.1) How many rotations did the turntable undergo during 4.5 s? (Express your answer to two significant figures.)2) Calculate the total number of rotations for the playing of the album. (Express your answer to two significant figures.)3) Calculate the total number of rotations for the complete slowdown of the album. (Express your answer to two significant figures.)
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Order these cosmological events in order from the latest(new) to earliest(old). formation of the first subatomic particles, formation of the first atomic nuclei, formation of the neutral atoms, formation of the first galaxies formation of the first galaxies, formation of the first neutral atoms, formation of the first ator formation of the first subatomic particles formation of the first galaxies, formation of the first subatomic particles, formation of the firs atoms, formation of the first atomic nuclei formation of the first subatomic particles, formation of the first galaxies, formation of the fire nuclei, formation of the first neutral atoms
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if you raise the temperature to 318 k, you find the rate of the reaciton has increased by a fctor of 4.4 what is the activation energy for this reaction?
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what is the wavelength of a 1.9 ehz x ray?
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is the rotational velocity of a child sitting near the center of a rotating merry-go-round the same as that of another child sitting near the edge of the same merry-go-round? explain.
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if the density of lead is 8.7 and teh densityof aluminum is 1.0 the numerical value of the desnity of the composite speher is
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