Physics question and answers for August 11, 2023
- Q Identify two situations where CONVEX mirrors are usedand explain why.Why is the curved bathroom mirror considered amagnifying mirror. Explain the optics.Why are telescopes made with parabolic mirrors insteadof spherical mirrors?Why...
- Q A home run is hit in such a way that the baseball just clears awall 14.0 m high, located 122 m from home plate. The ball is hit atan angle...
- Q A new printed circuit board design for a high speed electronicoscillator seems to fail at high frequencies. Your job is to doublecheck the design. One part of the circuit consists...
- Q A psychrometer has a dry-bulb reading of 85°F and a wet-bulbreading of 79°F. Find each of the following measurements.(a) relative humidity%(b) dew point°F(c) maximum moisture capacity of the airgr/ft3(d) actual...
- Q A 2.00 mol sample of an ideal gas with a molar specific heat ofCV = (5/2)R alwaysstarts at pressure 2.00 ✕ 105 Pa and temperature 300 K.For each of the...
- Q To get a better idea about tidal forces, Esperanza and Mikaassume that the black hole is about one solar mass, 2.0 ✕1030 kg, and that the distance from its center...
- Q The closest known star to our solar system is Alpha Centauri,which is approximately 4.30 light years away. Spaceship A, with aconstant speed of 0.800c relative to the Earth and a...
- Q A potter's wheel (a thick stone disk with radius 0.45 m and mass85 kg) is freely rotating at 52 rev/min. The potter can stop thewheel in 6.3 seconds by pressing...
- Q You have a spacecraft that is capable of reaching a speed of0.99c and desire to travel to Vega, a nearby star about 25 lightyears away. In order to keep track...
- Q Determine the power efficiency of the transformer
- Q A hollow sphere is rolling along a horizontal floor at 4.80 m/swhen it comes to a 26.0° incline. How far up the incline does itroll before reversing direction?The correct answer...
- Q Three dimensions. Three point particles are fixed inplace in an xyz coordinate system. Particle A, atthe origin, has mass mA. Particle B,at xyz coordinates (3.00d, 2.00d,4.00d), has mass 3.00mA, and...
- Q What is the relationship between the amount of charge of thefixed and test particles and the velocity of the test particle asit moves away from or towards the fixed charge?...
- Q PLEASE ANSWER PARTS A, B, C, D, AND E.A rocket is launched straight up with a constant acceleration of25 m/s2. Six seconds after liftoff, a bolt falls off the side...
- Q A spring of negligible mass stretches 3.00 cm from its relaxedlength when a force of 6.60 N is applied. A 0.400-kg particle restson a frictionless horizontal surface and is attached...
- Q mearth = 5.9742 x 1024 kgrearth = 6.3781 x 106 mmmoon = 7.36 x 1022 kgrmoon = 1.7374 x 106 mdearth to moon = 3.844 x 108 m (center tocenter)G...
- Q Discuss heat and mass transfer phenomena involved in freeze,spray and spray freeze drying. Discuss the mechanism behind therole of hygroscopicity in the pharmaceutical product ?
- Q Discuss principles of Fick’s first and second Law and explainit’s pharmaceutical application ?
- Q Object A is moving due east, while object B is moving due north.They collide and stick together in a completely inelasticcollision. Momentum is conserved. Object A has a mass of...
- Q A spherical bubble rises from the bottom of a lake whosetemperature is 6 oC at the bottom and 24 oC at the surface. If thebubble doubles its volume by the...
- Q One object is at rest, and another is moving. The two collide ina one-dimensional, completely inelastic collision. In other words,they stick together after the collision and move off with a...
- Q object m1 = 1.50 kg starts at an initialheight h1i = 0.290 m and speedv1i = 4.00 m/s, swings downward andstrikes (in an elastic collision) object m2 =4.40 kg which...
- Q Explain the role of mass transfer in the crystallization processand freeze drying ?
- Q A given copper wire has a resistance of 5.10 ? at 20.0°C while atungsten wire of the same diameter has a resistance of 4.67 ? at20.0°C. At what temperature will...
- Q Two parallel plates, each charged equally and oppositely to theother, are separated by 8.9500 cm. A proton is let go from rest atthe positive plate's surface and, at the same...
- Q x-ray Equipment Operation and QualityAssuranceWhy does the term \"density\" not apply to digital? How does thehistogram help to determine image brightness?
- Q In two vertexes of an equilateral triangle located charge +q and–2q. Find vector of electric field in the third vertex if length ofthe side of the triangle is a. Diagram...
- Q Consider a high energy photon interacting in tissue. The photonfirst interacts via pair production before undergoing a ComptonInteraction. The positron from pair production undergoesannihilation at the end of its life...
- Q A case of canned milk weighing 24 ?bs and is released from restat the top of a plane metal slide which is 30 feet long andinclined of 45º to the...
- Q A chain fixed at its ends and subject to uniform gravitationalforce hangs in the shape of a catenary curve. A parameterizationfor this curve is r(t)= <t, a cosh t/a +b>...
- Q Show that the total energy of a harmonic oscillator in theabsence of friction is conserved.
- Q An elevator system in a tall building consists of a 800-kg carand a 950-kg counterweight joined by a light cable of constantlength that passes over a pulley of mass 280...
- Q Design a synchronous counter, using T flip-flops, that has thefollowing sequence: 0010, 0110, 1000, 1001, 1100, 1101, and repeat.From the undesired states the counter must always go to 0010 on...
- Q The force acts on a particleF = 2xy ^ 2i + 2x ^ 2yj NFind the work done by force by moving the body from the point (0,0)to the point...
- Q A block of pine wood (p=.43 g/cm3) is floating on apond. The block is 10 cm x 40 cm x 5 cm thick.a) How much of the block protrudes above...
- Q Describe the photo electric event experimentally. Whycan't the photoelectric phenomenon be explained by classicalphysics?
- Q Please can someone double-check my answers?1) A ball with a mass of 0.15 kg has a velocity of 5m/s.It strikes a wall perpendicularly and bounces off straight backwith a velocity...
- Q Demonstrate that the WKB approximation yields the energy levelsof the linear harmonic oscillator and compute the WKB approximationfor the energy eigenfunctions for the n=0 and n=1 state and computewith the...
- Q Two charges Q1(+2.00µC) and Q2(+2.00µC) are placed symmetricallyalong the x-axis at x = ±3.00cm. Consider a charge Q3 of charge+5.00µC andmass 10.0 g moving along the y-axis. If Q3 starts...
- Q When a direct current flows through a straight length of wire,what is the direction of the magnetic field that is produced nearthe wire?A) The magnetic field is antiparallel to thedirection...
- Q A ball is thrown straight up with an initial speed of 19 m/s.The ball was released 6.3 m above the ground, but when it returnsback down, it falls into a...
- Q You and a friend drag a 28.8 kg fallen tree branch across alevel field. You pull with a force of 135.0 N at an angle of 25.0ºabove the horizontal while...
- Q Derive laplaces equation in:a) cartesian3-Db) cylindricalc) spherical polarplease be as detailed as can be with derivations andexplanations, please and thank you.
- Q A \"Linde-machine\" is used to cool and liquefy air. The cyclicprocess uses three different states runningthrough three different processes, assuming air as a diatomic idealgas:1 > 2: adiabatic compression with...
- Q The chains and sheets of galaxies and voids between themobserved in the large scale structure of the universe were oncethought to be contradictory with the big bang theory. Why are...
- Q Summarize Thermodynamics and everything you need to know/important in a brief summary. (For physics)
- Q What is the equation of a linearized quadratic equation?What is the equation of a linearized inverse equation?
- Q 3.Consider a series RLC circuit.a) When the capacitor is charged and the circuit is closed, findthe condition for the current to be oscillatory.b) When the circuit is connected to an...
- Q Determine the probability that a particle, in an energyeigenstate, trapped inside two rigid walls at x=0 and x=L, has amomentum Po.
- Q Assuming a composition entirely of atomic hydrogen, and adensity of1.67x10-19 kg/m3, use the formulae for JeansMass and Radius (whereappropriate), to determine which of the following gas clouds willcollapse:Cloud A: Mass...
- Q A 200-g piece of ice at 0ºC is placed in 0.200 L of water at25ºC. The system is insulated from its surroundings.What is the final temperature of the system?How much...
- Q 5: A skier, m = 65 kg, glides on a perfect hill, 10 m high, nofriction. However, at the bottom is a spring, k = 1500 N/m , systemto stop...
- Q Problem: Two blocks for masses m1 and m2 are stacked on top ofeach other and placed on a frictionless, horizontal surface. Thesurfaces between two blocks is rough and has a...
- Q What are the observations which cause astronomers to concludethat galaxies change over time.
- Q A capacitor C with plate separation d is charged with ±Q on thetwo plates. It is then connected (at time t = 0) to a resistor Rand discharged.a. What is...
- Q In an experiment, 300 g of aluminum (specific heat of 900J/kg*K) at 120 Celsius is mixed with 60 g of water at 20 Celsius,with the mixture thermally isolated. You will...
- Q How would you determine the number of proton-proton pairs, thenumber of neutron-neutron pairs, and the number of neutron-neutronpairs in an atom given its atomic number and mass number? Henceshow that...
- Q A straight, vertical wire carries a current of 1.27 A downwardin a region between the poles of a large superconductingelectromagnet, where the magnetic field has a magnitude ofB = 0.567...
- Q A 0.300-kg puck, initially at rest on a horizontal, frictionlesssurface, is struck by a 0.200-kg puck moving initially along the xaxis with a speed of 2.00 m/s. After the collision,...
- Q Even, in 1921, the Dodge Brothers built a boatnamed the SS Delphine and it had a whopping 3000 HP. So, how much horsepower would a Challenger SRT®Hellcat Redeye Widebody need to...
- Q 1. Give a few reasons for studying physics.2. Why must words be carefully defined for scientific use?3. Why are simplified models used in scientific study ifthey do not exactly match...
- Q How many projections can the full spin have in the systemcontaining 2, 3 and n electrons?Which atoms have a nonzero angular momentum in the groundstate?
- Q If the arm of a 118 lb female is held at a 45-degree angle fromshoulder to hand, estimate the external forces and moments at thewrist, shoulder, and elbow joint for...
- Q An 8.5 g ice cube at −10°C is put into a Thermos flaskcontaining 150 cm3 of water at 30°C. By how much has theentropy of the cube-water system changed when...
- Q 34.) 5. We perform a multi-slit experiment, using N = 6 slits.The wavelength of the light is lambda = 500nm and the distance ofthe screen from the slits is D...
- Q Find the direction and magnitude of the net electrostatic forceexerted on the point charge q2 in the figure.(Figure 1) Letq=+2.0μC and d=36cm. Express your answer using two significantfigures. Fnet =...
- Q Correct answer is given, please explain why for each.Concept Question 1 – A rock is thrown straight up from thesurface of the earth. Ignoring air resistance, which of thefollowing statements...
- Q The element rubidium consists of two isotopes, the stable85Rb and radioactive 87Rb (abundance 27.83%).What is the specific activity of natural rubidium chloride? Use Ar85.47 gmol-1 for rubidium element, Ar 86.91...
- Q A solid, homogeneous sphere with a mass of m0, aradius of r0 and a density of Ï0 is placed ina container of water. Initially the sphere floats and the waterlevel...
- Q Three resistors have values R1= 47Ω, R2 =100Ω, and R3 = 10 Ω. There is a 5V battery. The batteryand three resistors are all connected in various circuits describedbelow. Calculate...
- Q Suppose you start riding your bicycle from rest, and the wheelsreach an angular speed of 354 rpm in 5.4 seconds. How many completerevolutions do the wheels make in this time?
- Q A negative charge Q1 = -5.00 mC is located at a point X1 = -1.00m, a positive charge Q2 = 8.00 mC is located at a point X2 = 3.00...
- Q relate the EI for this system and patient dose: what range orlevel of exposure index should be utilized in order to keep patientdose to a minimum with this system? (Radiology...
- Q 1. The Cosmic Microwave Background and PrizewinningCosmology(a) How can we see the CMB if the photons were released 14billion years ago? Shouldn't those photons be billions of lightyears away by...
- Q Write the following vector in thecomponent form and add them.F1 = 15 N at60o, F2 = 20 N at 150o, andF3 = 30 N at 260o.
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