Physics question and answers for August 19, 2023
- Q Starting from rest, two skaters \"push off\" against each other onsmooth level ice, where friction is negligible. One is a woman andone is a man. The woman moves away with...
- Q A Si npn transistor at T = 300K has an area of 10-3cm2 , neutral base width of 1µm, and dopingconcentrations of NE= 1018 cm-3,NB = 1017 cm-3, NC =1016...
- Q A conventional activated-sludge plant treats 10.0 MGD ofmunicipal wastewater with a BOD concentration of 240 mg/l andsuspended solids of 200 mg/l. The sludge flow pattern is shown inFigure 11-1 of...
- Q state Maxwell’s equations mathematical and in ur own words alsomention the differentail form and the integral form
- Q A support beam, within an industrial building, is subjected tovibrations along its length; emanating from two machines situatedat opposite ends of the beam. The displacement caused by thevibrations can be...
- Q Calculate the density of states function for a systemconsistingof alarge number of independent two-dimensional simple harmonicoscillator.Use an adaptation of the methods developedin\"distribution function and densiy of states\" for the 3D...
- Q Describe why gain saturation in a homogeneously broadened mediumoccurs
- Q A square frame made of 4 mm-thick iron rods and anedgelength of 1 m is pushed into a homogeneous magnetic field of B=2 T(T=Vs/m^2) with a constant speed of 15...
- Q The speed of a water wave is described by v=(gd)^(1/2)Â Â where d is the water depth, assumedto be small compared to the wavelength. Because their speedchanges, water waves refract when moving...
- Q What is the proper Epicurean attitude to luxury?
- Q A mass on a spring undergoes simple harmonic motion. At t = 0its displacement is 1m and its velocity is 1m/s towards theequilibrium position. What single piece of information allows...
- Q Four identical metallic objects carry the following charges:+1.82, +6.98, -4.95, and -9.10C. The objects are broughtsimultaneously into contact, so that each touches the others. Thenthey are separated. (a) What is...
- Q Consider a one-dimensional chain of identical atoms. The springsbetween them alternate in strength between values K1 and K2.a) Find the vibrational frequencies as a function of wave numberq. Study the...
- Q A stage-discharge relationship is an inexpensive tool forobtaining continuous records of river discharge. Using sketches,describe what you understand by a stage-discharge relationship andhow it fills the role of a cheap...
- Q a spherical shell of mass 2.0 kg rolls without slipping down a38 degree slope A) Find the acceleration, the friction force, andthe minimum coefficient of friction needed to prevent slipping....
- Q Suppose we need to construct a tin can with a fixed volume V cm3in the shape of a cylinder with radius r cm and height h cm. (HereV should be...
- Q Determine the amplitude of a driven oscillator if the frequencyof the driver matches the natural frequency of the oscillatoritself. Assume a friction-free system.A damped oscillating system is driven by a...
- Q A soap bubble is floating in the air. The refractive index ofthe bubble is n = 1.33. The width of the wall is 115 nm. The lightthat hits the bubble...
- Q I need report about( Lighting pollution) withdetail..please use good hand write..
- Q What are the Efficiency, temperature, rate power, andconcentration for slat-Gradient solar ponds?
- Q What is the Epicurean position on death, and is itcoherent?
- Q An electron is one of the most fundamental particles in nature.It is everywhere, in all the matter we can see, and it is withelectrons that light interacts when it is...
- Q 5. Consider a particle in a two-dimensional, rigid, square boxwith side a. (a) Find the time independent wave functionφ(x,y)describing an arbitrary energy eigenstate. (b)Whatare the energy eigenvalues and the quantum...
- Q Extra problem: Thebasis of the l = 1 Hilbert space in the(L2, Lz) representation areY11(θ, φ),Y10(θ, φ),Y1-1(θ, φ).(1) Find the matrixexpressions of Lx, Ly andLz. Hint: make use of L+and...
- Q Suppose a sled passenger with total mass 51 kg is pushed 26 macross the snow (μk = 0.20) at constant velocity by a forcedirected 37° below the horizontal. (a) Calculate...
- Q In scanning probe microscopy, what is the most commontechnology to facilitateprecise scanning? (Describe/draw the operating principle aswell as the technologicalapplication (actual device)).
- Q Draw diagrams to show how to measure a)outer diameter, b)innerdiameter,c)depth using a Vernier Calliper.
- Q Use well labeled diagrams to explain the following twophenomena: the first is that at sunset (or sunrise) the sun appearsto be much redder than at mid-day, the second involves the...
- Q a)Draw the operational principle diagram for a roots-typevacuum pump.b)Describe the advantages and disadvantages of using a rootspump over the more commonrotary vane pump.
- Q Discuss the big bang theory of the universe:Why do we believe the Universe had a beginning?What is the evidence that the Universe is expanding?What is dark energy and how is...
- Q You're the operator of a 1.70
- Q Heat transferin a test in a double tube heat exchanger the following data areobtainedFor hot fluidFlow = 11.6 gal / secOutlet temperature = 30.1 ° CInlet temperature = 32 °...
- Q What is Zener Diode?
- Q As an airplane is taking off at an airport its position isclosely monitored by radar. The following three positions aremeasured with their corresponding times:x1 = 264.08 m at t1 =...
- Q Please Summarize the follwing article (this is for apresentation)\"When you release a yo-yo, gravity acts on its center of mass topull the yo-yo downward. Because the string of the yo-yo...
- Q Explain how a p - n junction works like a solarcell.
- Q Calculate the amount of energy required to escape from thesurface of the following bodies, relative to that required toescape from the surface of Earth.(a)    Uranus                    energy to escape Earth(b)    Mars                            energy to escape Earth
- Q 28) What process(es) cause the gaps in the rings of Saturn?
- Q Find three applications of quantum tunneling used in electronicsand explain the principles in detail.
- Q Two radio antennas are 140 m apart on a north-south line. Thetwo antennas radiate in phase at a frequency of 5.2 MHz. All radiomeasurements are made far from the antennas....
- Q The frequency of light reaching Earth from aparticular galaxy is 16% lower than thefrequency the light had when it was emitted.(b) What is the speed of this galaxy relativeto the...
- Q Problem (M-33). You are given a crystal of strontium at roomtemperture, or 300K. Draw the crystal structure and find the numberdensity of conduction electrons in the classical picture. Is this...
- Q whats the advantage of the extended media surface areain pleated filters?..a filter can be flipped over when one side isdirty...b. can be folded..c. creates cyclonic filtration actionbetween the pleats..d. provides...
- Q Provide three differences between classical mechanics and quantummechanics.
- Q A thin 0.100-kg rod that is 350mm long has a small hole drilledthrough it 87.5mm from one end. A metal wire is strung through thehole, and the rod is free...
- Q At rest, a car's horn sounds the note A (440 Hz). The horn issounded while the car is moving down the street. A bicyclist movingin the same direction with one-third...
- Q The mattress of a water bed has a length of 2.00 m, awidth of 2.00 m and a depth of 30.0 cm. Find the weight of thewater on the mattress...
- Q A person's lower leg is 1 meter long and has a mass of 9.5kg. Itis allowed to swing freely. If the leg is treated as a simplependulum with a length...
- Q Youexert a constant force of 20N up the slope on a 20kg block sittingon a slope of an angle 45 degrees with a coefficient of staticfriction of .3 and a...
- Q a knight is trying to scale the castle wall using a ladder themass of the knight is 73.1 kg the ladder is 2.50m long and has amass of 8.50 kg...
- Q consider Three-Dimensional harmonic oscillator with the samefrequencies along all three directions. a) determine the wavefunction and the energy of the ground state. b) how many quantumnumbers are needed to describe...
- Q write down the semi classical distribution function for phononsbased on boltzmann distribution
- Q TABLE 2. ROTATION DATA FOR THE ANDROMEDA GALAXYTABLE 2. ROTATION DATA FOR THE ANDROMEDA GALAXYRadius (arcminutes)Orbital Velocity (km/s)Radius (pc)Orbital Period (years)Radius (AU)Total Mass ( billions of solar masses)22512702215046210703058033596310100305120295140285160290180290Fill in blanks...
- Q einstein model take that in solid state, there are 3N normalmode vibration that all have the same mode frequency of ω0. thedensity of states σ(ω) for this model isσ(ω) =...
- Q At starbase Faraway Point, you observe two spacecraftapproaching from the same direction. The Picard approaches starbaseFaraway Point with a speed of 0.806 c, and the La Forge approachesthe starbase with...
- Q a. Use Faraday’s Law to derive the expression for the inducedEMF for an ordinary slide generator, being careful to explain thesteps, like on an exam.b. Use that to estimate the...
- Q A 500 lines per mm diffraction grating is illuminated by lightof wavelength 620 nm .Part BWhat is the angle of each diffraction order?Enter your answers using two significant figures in...
- Q In this example we will see that time dilation is a rather smalleffect for reference frames in which u≪c. An airplane flies fromSan Francisco to New York (about 4800 km,...
- Q A person takes 15 minute showers in 100°F water using a 2.0gallon per minute shower head. Ignoring losses, how many cubic feetof natural gas did the shower need if the...
- Q An ideal flow can be described by a velocity potential . Whatdoes express? Illustrate (choose your own flow example) how youwith help of the velocity potential and equipotential lines canfind...
- Q Consider a system of four nonidentical spin 1/2 particles. Findthe possible values of the total spin of this system and stateexplicitly the number of angular momentum eigenstates for each ofthe...
- Q Two point charges lie on the x axis. A charge of + 2.50pC is at the origin, and a charge of − 4.70 pC is atx=−12.0cm. What third charge should...
- Q Two people start at rest from the same point on a circular trackof radius R = 20 m. Person #1 runs counterclockwise around thetrack with a con- stant angular acceleration...
- Q How can I conduct an home experiment to explore:How thick is the liquid water film beneath a sliding icecube?
- Q Find the temperature distribution T(r,θ,z) inside a cylinder ofheight z= 20 and radius r= 8 , if the cylinder temperature is zeroin all surface except the bottom circular surface where...
- Q why does the wiedemann franz law always work at hightemperatures? why are the scattering processes simular at thatrange, and what would happen if a electric field is applied
- Q how does the linearized boltzmann equation affect transportproperties
- Q give the equation for current density in form of fermi diracdistribution function and graph it
- Q 1.carry out the dimensional analysis of a simplependulum2.The dimensional analysis of walking3.Dimensional analysis of a solid sphere moving through a fluid
- Q Indicate whether the following statements are always true or canbe false.True False  If an object's speed does not change, no netforce is acting on the object.True False  If two objects are under...
- Q (4) Consider a system described by the Hamiltonian H, H = 0 a a0 !,where a is a constant. (a) At t = 0, we measure the energy of thesystem,...
- Q An electron in a TV camera tube is moving at 7.20×106m/s in a magnetic field of strength 59 mT.Without knowing the direction of the field, what can you say aboutthe...
- Q A metal surface is susceptible to a photoelectric thresholdfrequency of 8.529*10>14Hz. Will the monochromatic UV lightsources of wavelengths 283 nm, 342 nm, and 363 nm be able to ejectphotoelectrons from...
- Q Solid-state physics, Band gapa, How does the size of the band gap depend on the strength ofthe periodic potential?b, Which type of material would you expect to have the strongerperiodic...
- Q Chemical reactions are often described using a three statemodel:Reactants→Transition State→ProductsReactants→TransitionState→ProductsIn most cases the energy of the transition state is much higherthan the energy of the reactant state. This means that...
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