Physics question and answers for July 25, 2023
- Q 1.a boy throws a javelin through a horizontal distance of 64 m. thejavelin leaves the hand 2.1 m above the ground.a) find the horizontal and vertical components of thejavelin’s initial...
- Q A)Why is the electrical resistivity of a thin film metal higherthan its bulk value? Choose one.- a) It experiences excessive surface oxidation - b) It has alower work function -...
- Q Two ideal linear sheet polarizers are arranged with theirtransmission axes at 10 degrees and 60 degrees with respect tovertical.a) If a beam of linearly polarized light with its electric fieldat...
- Q Two stones are dropped from the edge of a 60-m cliff, the secondstone 2.0 s after the first. How far below the top of the cliff isthe second stone when...
- Q A ceiling fan is turned on and reaches an angular speed of 120rev/min in 50 sec. It is then turned off and coasts to a stop in 40s. Find the...
- Q A 45 kg figure skater is spinning on the toes of her skates at1.0 rev/s . Her arms are outstretched as far as they will go. Inthis orientation, the skater...
- Q Three point charges are aligned along the x axis.Threepoint charges lie along the x-axis in the x y coordinate plane. Acharge of −4.00 nC is 0.500 m to the left...
- Q Q.2.Two sinusoidal waves combining in a medium are described bythe wave functions y1 = (0.3m ) cos (2Ï€x +40Ï€t) y2=( 0.3 m) sin(2Ï€x +40Ï€t ) (i). What will be the...
- Q a) A block ice of mass 1kg has a temperature of -5°C and getsplaced in Calorimeter A, filled with 10l of water at a temperatureof 15°C. Determine the temperature Teq...
- Q Describe the principle behind the working of a motor and thegenerator?Then, explain the “motor- generator dualityâ€
- Q How do magnetic field lines from the coil compare with those ofpermanent magnet? Explain why they have similar shape. What are thesources of these magnetic fields?
- Q Solve using any method you would like, but show your work.Suppose we were considering the Atwood’s machine pictured at right.A block of mass M1 = 1.5 kg is on a...
- Q At the equator, near the surface of the Earth, the magneticfield is approximately 50 ?? northward, and the electric field isabout 100 N/C downward in fair weather. Find the magnitude...
- Q Write and explain the integral form of Maxwell’s Equations asapplied to free space, that is, in the absence of any dielectric ormagnetic material.
- Q What has research discovered about (a) backgrounds and (b)psychological characteristics of school shooters? Do you believecertain weapons should be banned? Which ones and why?
- Q Consider a system of three non-interacting particles confined by aone-dimensional harmonic oscillator potential and in thermalequilibrium with a total energy of 7/2 ħw.(a) what are the possible occupation numbers for...
- Q For the thermal radiation from an ideal blackbody radiator witha surface temperature of 2100 K, let Ic represent the intensity perunit wavelength according to the classical expression for thespectral radiancy...
- Q A particle in the infinite square well (width a) starts outbeing equally likely to be found in the first and last third of thewell and zero in the middle third.What...
- Q In the figure, block 2 of mass 2.90 kg oscillates on the end ofa spring in SHM with a period of 26.00 ms. The position of theblock is given by...
- Q Two 1.9 kg balls are attached to the ends of a thin rod ofnegligible mass, 62 cm in length. The rod is free to rotate in avertical plane about a...
- Q Two long, straight wires are perpendicular to the plane of thepaper and at a distance 0.2 m from each other, as shown in thefigure. The wires carry currents of I1...
- Q There are four charges, each with a magnitude of 2.16
- Q Consider the Potential V(r) =Vo (c/r) exp (-r/c) (where c is aconstant) and a deutron of reduced mass m moving in this potential. (a) Using a trial wave function R(r)...
- Q A long straight cable of radius a = 0.100 m lies along thex-axis. Inside the cable the current density is constant and hasmagnitude J = 5.00 ( Ampere m-2 )....
- Q A roller coaster reaches the top of the steepest hill with aspeed of 6.80 km/h. It then descends the hill, which is at anaverage angle of 35° and is 56.0...
- Q 1. Can you explain how does a Michaelson interferometerwork?2. What can you use Michaelson interferometer for?3. What was Michaelson interferometer first used for to clarifymedium for light propagation?
- Q Describe the process of making the viewed image clearer with theadjustment knobs in microscopy. Which do you use first? What do youneed to be careful of?
- Q Calculate (in MeV) the total binding energy for 40Ar.Express your answer using four significant figures.Calculate (in MeV) the binding energy per nucleon for 40Ar.Express your answer using three significant figures.Calculate...
- Q A particle with mass m moves on the surface of a cylinder withradius R. At the same time, the force F = -kr on the particleaffects it through the z...
- Q Like all our lab exercises, the waves and sound lab will use aPhET simulator. Some of these simulators require you to enable Javaor Flash. You can download and use the...
- Q Density log is a popular search in well logging in oilindustry. Give information about density log in detail which willhelp petroleum engineers in decision making?Principle, measurement units, responses, application, decisionmaking...
- Q I need fast for my Courseworks, need al least 4 hoursafter i post this question.1. Explain About Linear Antenna And Surface Antennaand gives some examples!2. What is Major Direction and...
- Q Find the energy necessary to put 5 kg , initially at rest onEarth's surface, into geosynchronous orbit.
- Q The inside of a wire has a current density of J (r) = ( 5 / r )A/m2radius of wire = 0.15mFind magnitude ofmagnetic field when at a radial distance...
- Q An object of massm1 = 0.415 kgstarts from rest at point  and slides down an inclinesurface that makes an angleθ = 36.0°with the horizontal as shown. The coefficient of kineticfriction between...
- Q Show all your work. Make sure every number has a unit and youshow the equations in the variable form before plugging in values.The rod is 2 m long and has...
- Q An object of mass m1 = 0.435 kgstarts from rest at point  and slides down an inclinesurface that makes an angle θ = 36.0°with the horizontal as shown. The coefficient of...
- Q For each questions, please show me all your work and explain theanswer.1. A rocket is moving at 1/4 c relative to Earth. At the centerof this rocket, a light source...
- Q What color would you see if you wereto shine a beam of yellow light and a beam of cyan light at thesame spot on a white wall? (Warmup: Explain your...
- Q Can u please write two pages on lens history and whatare lenses.... Applications in today's life... Please don't copyfrom online sources... If its ur own work one page is alsogood
- Q In the experiment: To determine the resistivity of asemiconductor using Four probe method.What does the floating potential mean? Like what's thedifference between potential and floating potential?Also what does the correction...
- Q 47. Suppose that 1 kg of U235 undergoes fission by thermalneutrons. Compute the masses (or mass equivalents) in grams for thefollowing, which are produced: 1. neutrons, 2. γ-rays, 3. β-rays,4....
- Q 1. Light of wavelength 620nm in air is incident on a surface ofa flat piece of glass with an index of refraction of1.50 with an angle of incidence of 30°.a.What...
- Q What is the mystery of gamma rays? What is it that we do notunderstand?
- Q Compare and contrast any TWO of the following thermal analysistechniques;(i) Differential Scanning Calorimetry, DSC,(ii) Differential Thermal Analysis, DTA,(iii) Thermogravimetric Analysis, TGA,18 marks so please give a proper answer
- Q Mass m = 0.1 kg moves to the right with speed v = 0.54 m/s andcollides with an equal mass initially at rest. After this inelasticcollision the system retains a...
- Q A thermos contains 150cm3 of coffee at 85◦C. To cool thecoffee, youdrop two 11g ice cubes into the thermos. The ice cubes areinitially at −10◦C and melt completely. What is...
- Q A microwave oven is a kitchen appliance. Is it safe to stand bya microwave oven when it is cooking food? Should we use microwaveto cook the egg in shell? Explain...
- Q A certain transverse wave is described byy(x,t)=Bcos[2π(xL−tτ)], where B = 5.40 mm , L = 28.0 cm , and τ =4.00×10−2 s . a)Determine the wave's wavelength. b)Determine thewave's speed...
- Q Suppose I have a current source of 1.0 Amperes flowing througheach of the following coils. What is the magnetic field in Teslaand in Gauss at the stipulated points? 1) At...
- Q A wire carrying a 30 A current pass between two strong barmagnets and experiences a 2.16 N force on the 4.00 cm of wire inthe field. (i) Show the direction...
- Q Consider Hydrogen with an electron in the n = 2 state.a) Find the Energy of the electron.The electron is in the 2p state. Then it moves to the 1sstate.b) Calculate...
- Q A capacitor C1 =1F is connected to a 1V battery using a wirewith a total resistance R = 1OhmSuppose after the charging is complete the capacitor C1 isconnected to another...
- Q Does the resistance torque change as leg position is changed?Explain, based on the average scores for perceived exertion, whichleg position is easiest to perform and which is hardest. Why arethere...
- Q What is wave-particle duality of light?What is energy quantization?What is ultraviolet catastrophe?State and describe the Rayleigh-Jeans Law.
- Q In the experiment: To determine the resistivity of thegiven semiconductor sample by Four Probe method.Why are there \"four\" probes instead of 2? what is themechanism of that four probe setup...
- Q A 10-cm-long thin glass rod uniformly charged to 13.0 nC nC anda 10-cm-long thin plastic rod uniformly charged to - 13.0 nC nC areplaced side by side, 4.20 cm cm...
- Q An object with a mass of 4.15 kg undergoes an acceleration of2.7 m/s2 for a period of 8.0 s. It then undergoes an accelerationof -3.2 m/s2 for a period of...
- Q Show that an electron jumping down from the 6thexcited state down to the 5th excited state in ahydrogen atom emits an infrared photon of 12,367nm.Show that in a hydrogen atom...
- Q A horizontal spring attached to a wall has a force constant of k= 770 N/m. A block of mass m = 2.00 kg is attached to the springand rests on...
- Q Please Answer the following problem 1 and 2. write clearly.PROBLEM 1A 5.96 − kg block is placed against a compress spring on africtionless 27.0 degrees incline. The spring,whose force constant...
- Q A 15Ω coffee maker and a 15Ω frying pan are connected inseries acrossa 120V source of voltage. A 22Ω bread maker is also connectedacrossthe 120V source and is in parallel...
- Q A ball of mass m is tied to a string and is rotating in avertical plane. The string is elastic (it stretches), which causesthe path to be elongated vertically rather...
- Q 1. A surgeon inserted a needle in thepatient’s vein. The needle was connected to a top-open plastic bagfilled with therapeutic fluid and lifted to a height h.Find h , which...
- Q PLEASE answer questions 3 , 4 & 5. write clearlyPROBLEM 3Calculate the magnitude of the gravitational force on acantaloupe of mass m = 873 g on the surfaceof the Earth...
- Q Two separate experiments -- double-slit and diffraction grating-- use a 400-nm electromagnetic wave. In both experiments, a long,flat wall where the results are seen is located 2.00-m across fromthe slits/grating....
- Q 1) A piano tuner hears one beat every 1.3 s when trying toadjust two strings, one of which is sounding 350 Hz. How far off infrequency is the other string?2)...
- Q Explain the significance of Kepler’s laws for planetary motion.Name and describe the work of at least 2 other scientists whocontributed to the theory of gravity which helped explain Kepler’sobservations.
- Q Please answer the questions carefully.1.Roller Coaster CapitolDisney LandMagic MountainSix FlagsCedar Point2.Which of the following household items are examples of thesecond law ofthermodynamics?Air conditionerVacuumRefrigeratorBoth a and c3.Magnetic North and the North...
- Q Draw free body diagrams for the motorcycle rider for each of thefollowing situations. Label all your force vectors clearly, anddraw them in a self-consistent manner – that is, forces that...
- Q A train, travelling with velocity v = 0.8c, enters a tunnel. Thetrain has proper length 100m and the tunnel has proper length 80m.When the center of the train coincides with...
- Q Explain at least three characteristics of the Sun thatcontribute to its solar activity. (Please answer in your own wordsand type answer, thanks).
- Q A steering mirror for a telescope has a maximum angularacceleration of 100 rad/sec^2 and hard stops at +/- 30 the softwarecontrolling it runs at 200 hz. If the mirror hits...
- Q 2. A 15-MΩ resistor and a 48-nF capacitor get connected inseries to a 15-V battery. a. How long will it be until thecapacitor is “fully†charged? b. If the battery...
- Q Consider 100 g of aluminum (p = 2700 kg/m^3) and 100 g of lead(p = 11,300 kg/m^3). a. Which as a greater volume? Show why this istrue mathematically. b. Which...
Get Answers to Unlimited Questions
Join us to gain access to millions of questions and expert answers. Enjoy exclusive benefits tailored just for you!
Membership Benefits:
- Unlimited Question Access with detailed Answers
- Zin AI - 3 Million Words
- 10 Dall-E 3 Images
- 20 Plot Generations
- Conversation with Dialogue Memory
- No Ads, Ever!
- Access to Our Best AI Platform: Flex AI - Your personal assistant for all your inquiries!