Physics question and answers for July 28, 2023
- Q Picture a mass moving horizontallyunder the influence of a linear spring force. Neglect airresistance and friction.(a) Use Newton’s second law to setup an equation that describes the motion of the...
- Q Question 1a) A girl throws a stone vertically upwards with an initialspeed of 5 m/s. How much later must she drop another stone from thesame point 1.2 m above the...
- Q A 0.80-μm-diameter oil droplet is observed between two parallelelectrodes spaced 11 mm apart. The droplet hangs motionless if theupper electrode is 26.6 V more positive than the lower electrode.The density...
- Q An ancient club is found that contains 190 g of pure carbon andhas an activity of 4.5 decays per second. Determine its ageassuming that in living trees the ratio of...
- Q Lauren has a bow that can shoot arrows at speeds of 0.3c. She istravelling across the Great Sandy Desert to her next archerycompetition on an ultrafast train that moves at...
- Q Problem 1) A 5 cm tall object is 20 cm in front of a diverginglens with a focal length of 10 cm. a) What is the location of theimage? -6.67cm...
- Q Canyou walk me through this problem? Also, what does \"relative to thewater\" mean?---A passenger walks from one side of a ferry to the other as itapproaches a dock. The passenger's...
- Q what is the magnetic susceptibility of a sample? howdoes it change with different magnetic behaviours in the solid?
- Q The figure shows a conical pendulum, in which the bob (the smallobject at the lower end of the cord) moves in a horizontal circleat constant speed. (The cord sweeps out...
- Q To a rough approximation, the Earth can be treated as a greybodysphere with uniform temperature, absorptance ? = 0.70 andemissivity ? = 0.61. The low absorptance is largely due toreflection...
- Q 1. Two students are kayaking on the Saint John River. Initially,they are floating directly beside each other chatting and movingwith the river current at 1.50 m/s downstream. Student A pushesaway...
- Q Your manager wants you to design a new superinsulated hot-waterheater for the residential market. A coil of Nichrome wire is to beused as the heating element. Calculate the length of...
- Q 1. What is the physics behind the light amplification of opticalamplifiers? What are the required conditions to make theamplification happen?2. Describe what happens below, at, and above the lasingthreshold of...
- Q If the volume is the same in the whole process, the process isperformed with an isochoric.Select one:TrueFalse--------------------------------------------------------------------------------------------------------------------Every quasistatic process is necessarily reversibleSelect one:TrueFalse----------------------------------------------------------------The a / v2 term in the van...
- Q If a person of mass MM simply moved forward with speed VV, hiskinetic energy would be 12MV212MV2. However, in addition topossessing a forward motion, various parts of his body (such...
- Q In a spring gun system, a spring with a spring force constant420 N/mN/m  , is compressed 0.13 mm . When fired, 80.9 %%of the elastic potential energy stored in the spring...
- Q Mahmut with mass 70.0 kg and Güllü with mass 45.0 kg areskating. While Mahmut stands at rest, He is struck by Güllü. She ismoving at 15.0 m/s before she collides...
- Q a. Predictionb. Result or consequencec. Recommendation/ Call for action
- Q (a) The Hubble Space Telescope is in a nearly circular orbit,approximately 610 km (380 mi) above the surface of the Earth.Estimate its orbital period from the generalized version ofKepler’s third...
- Q A particle of rest energy 800 MeV decays in its rest frame intotwo identical particles of rest energy 250 MeV. What are thekinetic energies (in MeV), momenta (in MeV/c), and...
- Q The frequency range (the difference between themaximum and minimum frequencies) of the lyman series is.
- Q ​Afootball is kicked at an angle of 30° with an initial velocity of28 m/s. How high does it go?
- Q A firefighting crew uses a water cannon that shoots water at29.0 m/s at a fixed angle of 47.0 ∘ above the horizontal. Thefirefighters want to direct the water at a...
- Q The Sun radiates energy at a rate of about 4 × 1026 W.1) At what distance from the Sun is its intensity the same asthat of a 100 W light...
- Q 1.Please determine how likely any mode (of mode frequency, uwhere hu=kT) is to be thermally occupied according to Planck’s Law.Note, your answer will help you compare the probability ofstimulated emission...
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