Ultimate Physics Study Guide - Questions & Answers

Hi I need help my home work says can you change use the sun energy to produce the food in this sandwich the cheese came out from the milk I'm a cow that a crash that took energy from the sun for explain fill in the other chain
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The load across a 120-V power supply consists of three resistances are R1 = 10 , R2 = 30 , and R3 is unknown. If R2 has a difference of potential of 45 V across it, find the other voltage drops across the other resistors, the current through each resistor, and R3.
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Which piece of evidence from the article explains WHY the sun has a larger force of gravitythan the Earth?(A)Isaac Newton, an English scientist, discovered a law, or truth, aboutgravity in the late 1600s.(B)The greater the mass of an object, the greater is its force of gravity.(C)Even a speck of dust has a force of gravity(D)The smaller the distance, the greater is the force of gravity between them.
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Given uranium 235 go through an alpha, beta, beta, alpha, gamma, neutron and alpha. What do you have now? a. 92, 231 b. 88, 222 c. 88, 220 d. 90, 222
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does a atom power a star
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What is the difference between a neutral atom and an ion?
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Which statement is NOT true about voltage?A higher voltage means a faster current.All electricity sources have the same voltage.Voltage is the difference in electrical potential energy.The unit for voltage is volt (v).
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Both X-rays and gamma rays have higher frequencies than ultraviolet rays True or False
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Electromagnetic waves require a medium to transfer energyTrue or False
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In order for generators to work, this type ofenergy must be harvested: A. chemical energyB. neuclear energyC. mechanical energyD. electrical energy
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For each of the situations described below, the object considered is undergoing some changes. Among the possible changes you should consider are:(Q) The object is absorbing or giving off heat.(T) The object's temperature is changing.(U) The object's internal energy is changing.(W) The object is doing mechanical work or having work done on it.(C) The objects chemical energy is changing.For each of the situations described below, identify which of the four changes are taking place and write as many of the letters Q T U W C (or none) as are appropriate.1. A cylinder with a piston on top contains a compressed gas and is sitting on a thermal reservoir (a large iron block). After everything has come to thermal equilibrium, the piston is moved upward somewhat (very slowly). The object to be considered is the gas in the cylinder.Q T U W C2. Consider the same cylinder as in part 1, but it is wrapped in styrofoam, a very good thermal insulator instead of sitting on a heat reservoir. The piston is pressed downward (again, very slowly), compressing the gas. The object to be considered is the gas in the cylinder.Q T U W C3. An ice cube sitting in the open air is melting.Q T U W C4. A mixture of two moles of hydrogen gas and one mole of oxygen gas in a thermally insulated vessel is subjected to small spark (contributing negligible energy) and converts to water vapor.Q T U W CExplain your reasoning for each of these cases.
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Which airplane has more potential energy, a boeing 787 dreamliner having a mass of 2,450kg at 11,500 m above Earth, or a boeing 747 having a mass of 3150 kg at 9000 m above Earth?
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A 5.4-kg ball is thrown into the air with an initial velocity of 35.2 m/s.aHow much kinetic energy does the ball have?
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Match the units in the right hand column with the terms in the right hand column
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Astronomers are comparing two stars that are known to have the same luminosity. Star A is observed to be 4 times brighter than star B. How far away is Star A compared to Star B?
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The maximum range of projectle is R if projected at angle of 45. It'll be 300% of Range of projectile if projected at angle? a) 30 b) 45 c) 60 d) 76 Correct answer with good explanation
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For an advanced lab project you decide to look at the red line in the Balmer series. According to the Bohr Theory, this is a single line. However, when you examine it at high resolution, you find that it is a closely-spaced doublet. From your research, you determine that this line is the 3s to 2p transition in the hydrogen spectrum. When an electron is in the 2p subshell, its orbital motion creates a magnetic field and as a result, the atom's energy is slightly different depending on whether the electron is spin-up or spin-down in this field. The difference in energy between these two states is E = 2BB, where B is the Bohr magneton and B is the magnetic field created by the orbiting electron. The figure below shows your conclusion regarding the energy levels and your measured values for the two wavelengths in the doublet are a = 6.544550 107 m and b = 6.544750 107 m. (Let h = 6.626069 1034 J s, c = 2.997925 108 m/s, and B = 9.274009 1024 J/T.) Determine the magnitude of the internal magnetic field (in T) experienced by the electron. When doing calculations, express all quantities in scientific notation, when possible keep six places beyond the decimal, and round your answer off to at least three significant figures at the end.
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Correct Number Formats Numbers may be entered in several formats - including scientific notation and numerical expressions. WebAssign uses standard scientific or "e" notation for "times 10 raised to the power." For example, 1e3 is the scientific notation for 1000. O You cannot have a space in a number. O You cannot substitute the letter O for zero or the letter l for 1. O You cannot include the units in the number unless specifically asked for. O You can include the sign + or - of the number. 1. Which of the entries below will be interpreted as a valid numeric answer in WebAssign?(Select all that apply.) a. 1.56e-9 b. 3.25E4 c. 2.54 m d. 1.56 e-9 e. 1.9435 f. -4.99 g. 1.23 inches
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When the energy stored in the object is released it will turn into energy. Please fill in the blank. Please someone answer this!! Its my second time posting it!!!
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PLZ HELPA wave has a wavelength of 4.9 m and a velocity of 9.8 m/s. The medium through which this wave is traveling is then heated so that the velocity is doubled.If the frequency remains constant, what is the wavelength of the heated wave?2.5 m9.8 m14.7 m19.6 m
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What does wave speed have to do with all SONAR AND RADAR technologies?What does the medium have to do with SONAR vs RADAR?
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Plz answer both thanks:)
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Which sentences describe the cyclone device?A cyclone device accumulates fine particulates from the air by making a dirty air stream flow in a spiral path inside acylindrical chamber. It consists of several long and narrow fabric filter bags suspended upside-down in a largeenclosure. When dirty alr enters the chamber, the larger particulates strike the chamber wall and fall into a conical dusthopper at the bottom. Fans blow dirt-filled air upward from the bottom of the enclosure, trapping dirt particles inside thefilter bags and releasing clean air from the top. The top of the chamber has an outlet that lets out cleaned air.
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1. Which Law? When you are standing up in a subway train, and the train suddenly stops, your body continues to go forward.A. Law 1B. Law 2C. Law 32. Which Law? A swimmer pushes water back with her arms, but her body moves forward.A. Law 1B. Law 2C. Law 33. Which Law? After you start your motorcycle, as you give it more gas, it goes faster.A. Law 1B. Law 2C. Law 3
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