Physics question and answers for July 22, 2023
- Q The diffusion rate of a gas is directly proportional to whatvariables and inversely proportional to what variables?
- Q What is happening that makes the sky look blue?A. Only blue light can get through our atmosphereB. Blue light is scattered by particles in ouratmosphereC. Red light is scattered by...
- Q A) The medium-power objective lens in a laboratory microscopehas a focal length fobjective = 4.00 mm . If this lens produces alateral magnification of -37.0, what is its \"working distance\";that...
- Q How much horsepower would a Challenger SRT® Hellcat RedeyeWidebody need to tow the SS Delphine up the industry standard:Davis Dam Grade Climb? Pro Tips Davis Dam assumed grade = 7%...
- Q Ice with a mass of 52 g originally at 0.0 deg. C is added to 450g of water originally at 80. deg. C. Determine the finaltemperature once all the ice...
- Q 1. State the right-hand rule for the magnetic field lines from acurrent-carrying wire.2. You’ve got magnetic field lines making circles around acurrent-carrying wire. How do you find the magnetic fieldvectors?3....
- Q For the highest temperature, is more of the intensity (area ofthe intensity vs. wavelength graph) in the visible part of thespectrum or in the infrared part of the spectrum? How...
- Q 1.) The workdone to assemble a collection of charges is given bythe formula Wensemble = (1/2)∑i(qiVi), where Vi is the scalarpotential at the point occupied by the ith charge in...
- Q Describe the process that occurs when the sound wave energytravels across the room.
- Q You are riding your bicycle directly away from a stationarysource of sound and hear a frequency that is 0.7% lower than theemitted frequency. The speed of sound is 346 m/s....
- Q A hemisphere of radius R is centered on the origin and immersedin an electric field, E, given by E = (B cos(θ) / r)r + Ar^2 sin^2 (θ) θ +...
- Q In a nuclear power plant, heat from radioactive decay boilswater and produces steam. If 250 Liters/min of water are turned tosteam, and the efficiency of this system is 0 .5575%...
- Q Write the first law of thermodynamics for magnetic material, andderive thermodynamic potentials and Maxwell equations. Determinethe difference in heat capacitance in the case of constant magneticfield and permanent magnetization.
- Q Describe the process that occurs when an object is put intovibration and the sound wave energy travels across the room. Howdoes it get there? And how does it eventually become...
- Q Consider a charge configuration in which a point charge ofstrength +50 nC is placed at (x, y, z) = (+2.0, 0, 0) m, andanother point charge, of strength −25 nC,...
- Q Highlight 3 important results where Quantum and ClassicalMechanical calculations differ? Explain qualitatively why ithappens?
- Q There is a coil in a plane of a page that contains 25 turns(loops). The diameter of the coil is 9.00cm and its resistance is5.0Ω. The coil is in a...
- Q A meteoroid of mass = 555 kg has a speed of 90.0 m/s when 700 kmabove the Earth. It is falling vertically (ignore air resistance)and strikes a bed of sand...
- Q Consider the following four blocks, all of which are attached toidentical springs:block A: mass = 200·g, spring stretched 10·cmblock B: mass = 800·g, spring stretched 20·cmblock C: mass = 400·g,...
- Q Rubidium-strontium dating. The rubidium isotope 8737Rb, a βemitter with a half-life of 4.75×1010yr, is used to determine theage of rocks and fossils. Rocks containing fossils of ancientanimals contain a ratio...
- Q Suppose you have a system and you know its wavefunction. Youwant to know a property of this system and you know the operatorfor that property. But sadly, the system’s wavefunction...
- Q “No amount of experimentation can ever prove me right; a singleexperiment can prove me wrong.†a famous quote of AlbertEinstein,Does this statement support inductivism?Also, what does it to do with...
- Q Comet ISON is one of the more recent comets that was originallycalled the \"comet of the century\" but turned out to be lessspectacular than predicted, while in the mid-1990s, there...
- Q If the Earth’s crust contained twice as much iron as it does,would atmospheric oxygen buildup have been slowed down or sped upduring the past 2.5 billion years?What would the consequence...
- Q Thepropeller of a World War II fighter plane is 2.50 m in diameter.(a) If the propeller tip experiences a centripetal acceleration of2.00 x 104 m/s2 while spinning, what is the...
- Q From indefinite integration of ??/?? = ?,  ? isconstant, find the velocity at time ?. Explain the meaning of theintegration constant.From the indefinite integration of the answer above, find theposition of...
- Q The left end of a long glass rod 8.60 cm in diameter, with anindex of refraction 1.55, is ground and polished to a convexhemispherical surface with a radius of 4.30...
- Q Palladium-103 (Pd-103) has a half-life of 17 days. Its molarmass is 0.10291 kg/mol.1) What is the decay constant of Pd-103?2) What is the initial activity of a 750-gram sample ofPd-103?3)...
- Q Show example of two map region with strong warm (red) and cold(blue) advection. if possible, use darker color for strong andlighter for a region.
- Q A cow that is 2 meters long watches a train passing at 90% ofthe speed of light. According to the cow the train measures 15meters.What is the factor ï§ of...
- Q ] Accreting, spinning, magnetized systems tendto:AccelerateGrow in massProduce jetsProduce supernovaeCannot be predicted[28] If space had been found to be negativelycurved, the other evidence might have us conclude that:The universe will...
- Q During a tennis match, a player serves the ball at 28.6 m/s,with the center of the ball leaving the racquet horizontally 2.33 mabove the court surface. The net is 12.0...
- Q shear thickening vs shear thickening material ?
- Q 40.0 gram of ice at −15.00 °C is put into a Styrofoam cupcalorimeter (of negligible mass) containing water at +15.00 °C.When equilibrium is reached, the final temperature is 6.00 °C....
- Q A person stands at the center of a turntable, holding his armsextended horizontally with a 1.5 kg dumbbell in each hand. He isset rotation about a vertical axis, making one...
- Q A 73 g ice cube at -45°C is placed in a lake whose temperatureis 76°C. Calculate the change in entropy of the cube-lake system asthe ice cube comes to thermal...
- Q D. What is the typical background radiation weare exposed to? What additional exposure would we get from a chestx-ray? A CT scan of the torso? A coast-to-coast flight? A year...
- Q A problem involves a car of mass m going down a trackfrom a height H, and round a loop of radius r. The loop isfrictionless.It asks for the minimum cut-off...
- Q Montréal is 510 km from Toronto, 12 degrees north of east. At analtitude of 9,000 meters, the windspeed is 80 km/h out of thenorth. For the entire 510 km, the...
- Q Light with a wavelength range of 142-295 mm shines on asilicon surface in a photoelectric effect apparatus.-What is the longest wavelength of the light that willeject electrons from the silicon...
- Q A concave lens has a focal length of magnitude 10 cm. It isplaced a distance of 25 cm from a concave mirror with a focallength of magnitude 15 cm. An...
- Q At 17°C, a rod is exactly 18.08 cm long on a steel ruler. Boththe rod and the ruler are placed in an oven at 250°C, where the rodnow measures 18.25...
- Q (6 pts) What is the significance of each of the following inthe study of astronomy:(a) Dark Matter(b) 21 cm Radiation(5 pts) Describe the overall structure and main parameters ofthe Milky...
- Q Learning Goal:To understand the use of Hooke's law for a spring.Hooke's law states that the restoring forceF⃗  on a spring when it has been stretched orcompressed is proportional to the displacementx⃗  of...
- Q 1. Use Excel to plot x(t) versus time for 2 periods of themotion. Use the equations fromthe lecture notes that are from the book. Put this in an Excelsheet call...
- Q Is the charge of the capacitor at the beginning of each cycle(starting from the lowest voltage)? Explain in terms of the voltageincrease and flow of charges?How could the value of...
- Q Can an inert gas in a detention situation be used to“dampen†a sharp peak in detonation pressure and convert that peakinto a more sustained pressure building?
- Q Discuss in details any two practicalapplications of Pascal’s principle.​​[8marks]
- Q A pendulum bob swings back and forth.  Ignore airresistance.  At point A, the potential energy is 15 J andthe pendulum bob is at a height of 1 meter.a) What is the mass...
- Q If a heavy nucleus were to fission into only two product nuclei,they would be very unstable. In what way? Why? How would theydecay?
- Q Discuss stellar parallax, how it works, and how it is used as atool in astronomy.Which spectral class has the highest surface temperature?Which spectral class has the coolestsurface temperature?What is the...
- Q Newton's 2nd law says that when a larger force is applied to anobject of mass m, the object will experience a larger acceleration.At the same time, you've learned that all...
- Q 1. What is the relationship between the history of the hearsayrule and the history of the trial by jury?2. What is the rationale for allowing some confessions intoevidence even though...
- Q A point charge +q is at the origin. A sphericalGaussian surface centered at the origin encloses +q. Sodoes a cubical surface centered at the origin and with edgesparallel to the...
- Q The ancient Greeks, Copernicus, and Brahe all thought that theidea that stars are much further away from Earth than planets wasdifficult or impossible to explain. What is the modern, scientificexplanation...
- Q Read the Operating Instructions for the Cs/Ba-137m IsotopeGenerator. Place a watch glass under the radio nuclide cow andelute a few drops of radioactive barium 137 onto the filter paper.Place your...
- Q The uniform line charge density extends over entire ringλ=1.96E-6 C/m Mass of ring M=0.13 kg. Radius of ring R=0.67 m.Radius of Magnetic field region, a=0.41 m. Magnetic field, B=1.61T. The...
- Q please paraphrase this paragraphFluorescence is a relatively faster phenomenon as compared withphosphorescence because of spontaneous emission of energy from S1to S0. If it chooses the nonradiative path from S1 to...
- Q Yasser Arafat, former chairman of the PalestineLiberation Organization (PLO), died in November 2004, after a briefillness. Not surprisingly, his death aroused considerablesuspicion, particularly given that his symptoms were somewhatconsistent with...
- Q We spent an entire semester talking about Newtonian mechanics(F=ma, KE=1/2 mv2) so that knowledge must be important. The truthis that those equations are almost precisely correct except for thefastest particles....
- Q The evil Empire from Star Wars is running a factory thatmanufactures droids. The factory is powered by a heat engine, whichuses a hot reservoir at 650 Kelvin and a cold...
- Q Explain the concepts of reflection, refraction (Snell’s Law),and total internal reflection using ray diagram.
- Q A certain lens focuses light from an object 2.15 m m away as animage 48.6 cm c m on the other side of the lens.Two converging lenses are placed 30.0...
- Q A double slit separation is 3 mm and is illuminated by a whitelight. A screen is placed 3.0 m away to observe the interferencepattern. a) What is the angular separation...
- Q “If each box of a dumb waiter weighs10 pounds, and one pound on either box is necessary to overcomefriction, what weight is in a box descending 8 feet per second...
- Q A hot air balloon has a volume of 65,00 cubic feet of hot air.The balloon is at sea level on a standard day. If the temperatureof the hot air in...
- Q Try to explain how the X-ray film works. Why the doctor forbidsthe patient wears metal product when X-ray film is taken. [120words]
- Q onanother planet a simple pendulum has a length of 90.0 cm oscillateswith a period of 1.7 seconds.1. compute the planet’s accerleration due to gravity andcomment on the planet’s gravity as...
- Q A.) We start with some review problems A crate of mass 49.6 kgrests on a level surface, with a coefficient of kinetic friction0.161. You push on the crate with an...
- Q A wave on a string is described by y(x,t)=( 4.0 cm )×cos[2π(x/(2.4 m )+t/( 0.30 s ))] , where x is in m and t is in s. Part B...
- Q A platinum sphere with radius 0.0197 m is totally immersed inmercury. Find the weight of the sphere, the bouyant force acting onthe sphere, and the sphere's apparent weight. The densities...
- Q Which of the following is/are true about light?(i) In the ray approximation, light travels in a straight lineunless it encounters an obstacle or new medium.(ii) Light's electric field oscillates in...
- Q E3. A block of mass 1.00 kg sits on an inclined plane as shown.(Figure 1)A force of magnitude 50.0 N is pulling the block up theincline. The coefficient of kinetic...
- Q In a region where the speed of sound is 330 m/s, a source ofsound emits a frequency of 440Hz. Assuming the observer is notmoving, at what speed would the source...
- Q A spherical conductor has a radius of 14 cm and a charge of 26micro columns. Calculate the electric field (vector) and theelectrical potential ata). R=10 cm from centerb). R= 20...
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