Physics question and answers for July 31, 2023
- Q Assume a ball starts at (x, y) = (0.0 m, 0.0 m) with aninitial velocity of 25.0 m/s at an angle (θ) of 65.0o relative tothe positive x-axis.(x, y) =...
- Q Friction lab Analysis: 1. HOW I CAN Construct a graph offriction vs Normal force. Can I plot both Static and Kineticfriction on a single Excel Graph and how. 2. How...
- Q An 8.00-cm-long piece of wire is formed into a square, andcarries a clockwise current of 0.150 A. The loop is placed inside asolenoid, and the plane of the loop is...
- Q A series circuit contains a 3.00 H inductor, a 3.00
- Q Its a video of a glider pushed forward and going backdue to a fan blowing of the opposite direction of beingpushed.After watching this video, Blake, a student in an introductoryphysics...
- Q Compare the passage of charged and uncharged particles throughmatter. What are the approximate probabilities of a single chargedparticle achieving a path- length equal to twice its range, or of asingle...
- Q For a string fixed at both ends with a constant tension, ifyou double the frequency what happens to thewavelength?For a string fixed at both ends with a constant tension, ifyou...
- Q A γ-ray which has energy of 400 keV collides with an atom andundergoes Compton scattering.(a) What is the energy of the wave in Joules and hence what isits frequency?(b) If...
- Q 1. Look up “heat engines†on the Internet. There will be a lotof technical discussion meant for engineers. Can you find any novelheat engines? Look up “nitinol engine.†Can you...
- Q if you toss a ball in projectile motion but used two balls ofmasses 20 and 30 grams, how would mass affect their motions in theX and Y direction? Please explain...
- Q 1. The formula ∆? = ???∆? is only good if ∆? is not too large.According to your textbook, what is considered a “not too large∆??†(a) ∆? ≈ 1 ?°...
- Q A line of charge (with charge per unit length given by λ)extends from (0,0,0) along the x axis to infinity. Answer thefollowing 2 questions about the electric field atthe point...
- Q 4. The centers of the moon and the Earth are separated by 3.84 x108 m. The moon has a mass of 7.34 x 1022 kg. The mass of the earthis...
- Q A small conducting spherical shell with inner radius a and outerradius b is concentric with a larger conducting spherical shellwith inner radius c and outer radius d. The inner shell...
- Q The magnetic field of a uniform plane wave that propagates in avacuum, is given by the expression:B (r, t) = (10^−6 )[xˆ + 2yˆ + Bzzˆ] cos [ωt + 3x...
- Q An electric field given byE→= 5.5î- 3.5(y2 + 4.6)ĵpierces the Gaussian cube of edge length 0.250 m andpositioned as shown in the figure. (The magnitude E is in newtonsper coulomb...
- Q a) What is true about how atoms are bound together in asolid?b) What is mass density?c) What is weight density?d) What is volume?e) What is surface area?
- Q Explain and demonstrate the use of a transistor hybrid model andfrequency response for various amps. The demonstration must includea scenario where you show how Zin, Zout, av, ai and cutofffrequencies...
- Q ASTRONOMY (please type the answer not write )Describe Jupiter – be careful and thorough. The length of yourdescription should be equivalent of one single-spaced typedpage.
- Q What determines how light bends? Use the words: index refraction,incident angle, reflected angle, refracted angle, and color.
- Q There is an experiment that demonstrates the first law ofthermodynamics by using a tin can. The problem is I don'tunderstand why there is a work done. The link to that...
- Q From simple, visible observations (without the use ofhigh-tech, modern technology) how do we know the Sun is rotating?What if the Sun stopped rotating? What about the Sun would bedifferent; if...
- Q 1. A cyclist travels 500m in 35 seconds. During the 35 secondsthe cyclist accelerates at a constant rate of 0.6 m / s2. Determineyour initial speed.2. A train travels at...
- Q Aphysics book slides off of a horizontal tabletop with a speed of3.10 m/s. It strikes the floor in 0.500s. Ignore air resistanceA. find the height of the laptopB. find the...
- Q The New Horizons mission has continued to explore the solarsystem. When was New Horizons launched? Where is New Horizons now?Describe at least two discoveries that New Horizons has made sofar.
- Q In no more than one page, describe the Bohr model of the atom,the assumptions is it based on, and how it relates to thecharacteristic emission spectra from discharge tubes containingatoms...
- Q a) Two charges are close together. One charge has +9.6 C and theother has -3.2 C. If you were viewing a field line diagram of thesecharges what would you expect...
- Q Try the following:get some stuff:a small ball (or some kind of object that will roll - a golfball or marble or toy car is great, but an empty soup can...
- Q The VASIMR Rocket NASA plans to use a new type of rocket, aVariable Specific Impulse Magnetoplasma Rocket (VASIMR ), on futuremissions. If a VASIMR can produce 6.0 N of thrust...
- Q A series circuit consists of an ac source of variable frequency,a 110 ? resistor, a 1.20 ?F capacitor, and a 4.10 mHinductor.A.) Find the impedance of this circuit when the...
- Q Q.Explain the following(a) Solar photo voltaic system.(b) Solar thermal energy technologies.
- Q Suppose a child gets off a rotating merry-go-round. Does theangular velocity of the merry-go-round increase, decrease, orremain the same if:(a) He jumps off radially?(b) He jumps backward to land motionless?(c)...
- Q 1. Two students in a physics laboratory each have a concavemirror with the same radius of curvature, 52.0 cm. Each studentplaces an object in front of a mirror. The image...
- Q a) Derive the Snell law mathematically.b) Why do the waves change speed and direction when changingthe environment?c) Waves are known to transmit energy. Can a wave transmitmomentum or angular momentum...
- Q Describe Young's double slit experiment in detail. What is thepurpose of the experiment?What kind of result has been achieved with theexperiment?
- Q In the figure, the particles have charges q1 = -q2 = 390 nC andq3 = -q4 = 95 nC, and distance a = 5.0 cm. What are the (a) x...
- Q A proton moving horizontally at a speed of 2.88x10^5 m/s entersa region of space between twosquare metal plates of side length 8.77 mm. The proton's path isdeflected an angle of...
- Q What changes in the atomic structure cause the absorption andemission of photons (light)?i) Absorptionii) Emission
- Q The rate at which a nebular cloud rotates increases as the cloudcollapses to form systems of stars and planets. Consider a smallsegment of a nebular cloud with a mass ?...
- Q Please solve and explain all parts. I don't understandYou decide to play a trick on your friend by dropping a raw eggonto their headThe egg is dropped (no initial velocity)...
- Q a10 kg rock begins to fall off a 10 m building. what is thepotential kinetic, total energies and velocities at 10 m,7.5 m,5m,2.50 m, and at ground level
- Q Please solve and explain all partsMany people assume that it is impossible for a car to turn inthe absence of friction. If the roadway is banked at exactly theright angle,...
- Q An ant, crazed by the Sun on a hot Texas afternoon, darts overan xy plane scratched in the dirt. The x and y components of fourconsecutive darts are the following,...
- Q A 2750 lb car has a frontal cross-sectional area A of 22.4ft2, a drag coefficient Cd of 0.28, and adrive (or tractive) force of 280 lbs. Assume an air density...
- Q Show that the reciprocal space of the BCC lattice forms an FCClattice.(Please explain every step)
- Q In the famous Millikan oil-drop experiment, tiny sphericaldroplets of oil are sprayed into a uniform vertical electric field.The drops get a very small charge (just a few electrons) due tofriction...
- Q A golf ball hit from the tee at ground level lands 62 m ahead3.0 s later. What was the initial speed of the ball and at whatangle with the horizontal...
- Q A vertical infinite wire along the z-axis has two symmetries:One is a rotational symmetry around the z-axis while the other is atranslational symmetry along the z-axis. Describe the symmetries ofa)...
- Q Three point charges are on the x-axis: q1 at the origin, q2 at 3m, and q3 at 7 m.A) Find the potential at the point (0, 4 m) if q1...
- Q Consider a wire of uniform density and mass M shaped into aquarter circle of radius R.The wire is located in the xy plane,with the origin at the focus of the...
- Q a- Consider an electron that moves freely in metal and aparticle moves freely in vacuum. Briefly explain differencesbetween the energy of these particles. b- Briefly explain thetemperature dependent conductivity of...
- Q The mass of the sun is 2*1030 kg. It currently consists to about70% (mass) of hydrogen. The dominant source of energy for the sunis the pp-chain (type I) fusion process...
- Q 3. An inductor/resistor circuit is powered by a direct currentEMF of 3.00 V until the inductor is fully powered. The decaycoefficient of the circuit is 2.15 ms. The inductor has...
- Q A vertical glass tube of length L = 1.280000 m is half filledwith a liquid at 20.000 000 degrees C. How much will the height ofthe liquid column change when...
- Q One particle has a mass of 3.84 x 10-3 kg and a charge of +8.90μC. A second particle has a mass of 8.33 x 10-3 kg and the samecharge. The...
- Q A glass rod is rubbed on a silk cloth, and then separatedfrom each other. When the rod and the silk cloth areseparated by 35 cm, a force of magnitude 2.20x10^−21...
- Q A block of mass m = 3.50 kg is released from rest frompoint A and slides on the frictionless track shown in the figurebelow. (Let ha = 5.20 m.)(a) Determine...
- Q A red ball is thrown down with an initial speed of 1.4 m/s froma height of 29 meters above the ground. Then, 0.6 seconds after thered ball is thrown, a...
- Q n = 4.43 mol of Hydrogen gas is initially at T = 336.0 Ktemperature and pi = 2.45×105 Pa pressure. The gas is thenreversibly and isothermally compressed until its pressure...
- Q A particle moves in the xy plane with constant acceleration. Att = 0 the particle is at vector r1 = (3.6 m)i + (2.8 m)j, withvelocity vector v1. At t...
- Q Suppose a friend is completing another physics assignment intheir chair at their desk and you take the opportunity to turn thisscenario into the physics question you now must complete. Yourfriend...
- Q Two bars of equal proper length Lo approach each other, movingin a longitudinal direction parallel to a common axis with the samespeed v with respect to a reference system of...
- Q 1) A car accelerates at 4 m /s / s. Assuming the carstarts from rest, how far will it travel in 10 s?2) An object falls freely from rest on...
- Q For 2 MeV alpha, beta, and gamma emissions calculate thefollowing quantities relativistically for each emission: T (KineticEnergy), E (total energy), gamma (correction factor), p (momentum),m (mass), and v (frequency). Use...
- Q a.Consider a hypothetical gas of four distinguishable particles,labeled W, X, Y and Z. Assume that they are distributed betweenonly two translational quantum states of energies 2E and 4E. Howmany different...
- Q A Geiger tube consists of two elements, a long metal cylindricalshell and a long straight metal wire running down its central axis.Model the tube as if both the wire and...
- Q A commercial refrigerant that uses R-134a as the refrigerant isused for cooling, to keep the condition at -35o, throws heat intothe cooling water that has been in the condenser at...
- Q For 2 MeV alpha, beta, and gamma emissions calculate thefollowing quantities relativistically for each emission: T (KineticEnergy), E (total energy), gamma (correction factor), p (momentum),m (mass), and v (frequency). Use...
- Q If n1<n2 andn3<n2, which of the following statementsare true when it comes to finding out if you have destructiveinterference of the reflected rays?You do need to know if n1 is...
- Q 1. What is the working principle of a photodiode? Give threeexamples of photodiodes’ real-life applications.2. Which of the following photodiode modes performs better insaturation and response time? Photovoltaic or photoconductive...
- Q Stars fuse lighter nuclei to form heavier nuclei (to the extentthat they are capable and the fusion process is energeticallyfavorable). Based on the plot of binding energy per nucleon, do...
- Q 1. Why are the thermal detectors slower and less sensitive thanthe photon detectors?2. What are the physical origins of the shot noise and Johnsonnoise in an optical detector?
- Q How much work, in Joules, does it take to dig up a cylindricallyshaped hole of depth 2 meters and outer diameter 3 meters? How manyservings of pasta are required to...
- Q Suppose two worlds, each having mass M and radius R, coalesceinto a single world. Due to gravitational contraction, the combinedworld has a radius of only 7/8 R. What is the...
- Q Given the following factors below, describe how themolecules of the reactants are being affected. Give examples.1. Reactant concentration2. Increase in temperature3. Increase in surface area of the solid reactants.4. Properly...
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