Physics question and answers for August 16, 2023
- Q A (cube, with a calculable volume of dimensions Xm=7 xYm=7 x Zm=7), having density rho=80kg/m3, is 80% (less than 100%)submerged in a fluid having densityrhofluid=1500 kg/m3. Find a)the tension in...
- Q A bar magnet falls freely, with its north pole pointing straightdown. It approaches and passes through a fixed, horizontallyorientated, metal ring.a) How, if in any way, is the magnet's motion...
- Q Given the Ising model or a canonical ensemble how isthe critcal temperature calculated?Also, would you happen to know the relationshipbetween how many neighbor interactions there are and how thisaffects temperature?thanks!
- Q 10.A 12.3 kg child jumps up and grabs a (round) horizontal treebranch that has a diameter of 6 cm. The child grabs the branch 28cm from the trunk, and the...
- Q A 3kg object is attached to spring and will stretch the spring392mm by itself. There is no damping in the system and a forcingfunction of F(t)=10 coswt, w=(k/w)-2 is attached...
- Q (a) A particle is dropped (from radius a with zero velocity)into the gravitational potential corresponding to a statichomogeneous sphere of radius a and density Ï. Calculate how longthe particle takes...
- Q 1a Describe how thermal energy is obtained byfission, specifically when a U=235 atom is hit by a slow-motionneutron (less than 0.9 MeV). When one states that 200 MeV of energyare...
- Q A man walks 1.55 km south and then 2.25 km east, all in 2.80hours.(a)What is the magnitude (in km) and direction (in degrees south ofeast) of his displacement during the...
- Q If we recreated the scene from Fast & Furious 7 and droppeda Challenger SRT® Hellcat Redeye Widebody from a C-130 aircraft at5,280 ft, how much horsepower would it take to...
- Q A sledge loaded with bricks has a total mass of 18.2 kg and ispulled at constant speed by a rope. The rope is inclined at 20.1°above the horizontal, and the...
- Q Consider an experiment in which we bombard an unknown, quantumsystem with a broad beam of monochromatic light. By varying thefrequency of the light, we detect which frequencies are absorbed bythe...
- Q 1. Two long solenoids are placed in the coaxial position, oneinside the other, they have 30 cm and 20 cm diameters,respectively. The outer solenoid is 2 m long with 5000...
- Q Consider what happens in a magnetic brake from a potent magnetthat falls inside a conductor vertical tube:a) What is the physical phenomen (of physic law) that’s takingplace in the magnetic...
- Q Students are sitting in a classroom and listening to a lecture.If the lecture has a sound level of 65 dB to the student sitting inthe front row, what is the...
- Q (Please type not write it down) Astronomy4. Carefully describe Saturn’s rings. What is the compositionand physical structure? The length of your description should be1/2 page
- Q Dodge is known for appearing in the most badass action moviestunts. Well, now we’re challenging you to think about what ittakes to pull it off...If we recreated the scene from...
- Q A 50.0g thermometer is used to measure the temperature of 130mL of water. The specific heat of the thermometer, which is mostlyglass, is 750J/(kgK), and it reads 23.0 ∘C while...
- Q a muonic atom has an electron replaced by a particle called amuon, which is about 200 times more massive, but otherwise almostthe same as an electron before you start the...
- Q 1. In a system design the electrons are accelerated from restthrough a potential difference of 250 V. The electrons travel alonga curved path because of the magnetic force exerted on...
- Q Congratulations! You have just inherited 250 acres of land insouth Texas. An oil company approached you and offered you a one1/2 percent (0.005) royalty for the rights to your oil....
- Q Interstellar gas in many galaxies is in virial equilibrium withthe stars, in that the rms speed of the gas particles is the sameas the rms stellar speed. Consider a large...
- Q Two children are sliding down a snowy hill which is inclined by45.6 degrees with respect to horizontal. One has a rough sled whichhas a coefficient of kinetic friction between it...
- Q k=9.00*10^9 Nm^2/C^2. Pay attention to unit conversions.In one experiment the electric field is measured for points atdistances r from a very long, straight line of charge that has acharge per...
- Q Consider the following situation. With the power supply off,the current limit one-half of a turn and the voltage knobcompletely counterclockwise, a coil is connected to it. A secondarycoil is placed...
- Q Thelight on the ceiling is 3.375m above the ground. When a thin lensis placed 25cm above the ground, a minified image of the light fromthe ceiling is formed on the...
- Q Two thin square flat sheets are placed parallel to each other.The distance between the sheets is much smaller than the size ofeach sheet, so we can consider the sheets infinite....
- Q A radar station locates a sinking ship at range 19.5 km andbearing 136° clockwise from north. From the same station, a rescueplane is at horizontal range 19.6 km, 166° clockwise...
- Q A proton moves with a speed of 0.895c.(a) Calculate its rest energy. _____MeV(b) Calculate its total energy. ____GeV(c) Calculate its kinetic energy._____GeV
- Q A point on a circle with a diameter of 10m starts atan upright position P at (0,r) and moves clockwise with anacceleration .6m/s^2 .When t=7 :-Find position-Find velocity-Find accelerationrelative velocity
- Q make a charge arrangement problem of 6 charges where you can usesymmetry to simplify the process of finding the solution. includeyour solution and show how symmetry was used. The problem...
- Q A child hits an ice cube with a mass of 10 grams on a table witha force of 10 N. The impact lasts 0.02 seconds. The ice cube fliesoff the...
- Q An inclined plane is sliding, and accelerating, on a horizontalfrictionless surface. There is a block at rest on the slopingsurface, held in place by a static friction through the horizontalacceleration...
- Q In your own words explain why the force and acceleration vectorsin Uniform Circular Motion point inward. Also discuss thedifferences between Centripetal Force and CentrifugalForce.
- Q To apply the concept of base of support, have a partner standwith his or her feet together and see how much force you must applyto move him or her off...
- Q The optimal x-ray energy for producing high contrast images isapproximately in the range 20-40 keV. In terms of what we knowabout how x-rays interact with atoms, discuss the main mechanismsthat...
- Q Two masses, m1 and m2, are falling but not freely. In additionto gravity, there is also a force F1 applied directly to m1 in thedownward direction and a force F2...
- Q In one measurement the following values were obtained :mass of the substance: M=1.3kg,Power used : P=8.1WSlope of the Temp vs Time: S=0.027 oC/sec.Knowing that the error on each measured value...
- Q 4. A car of mass m is traveling with constant speed v around acircular banked road of radius R, see theside view and the free-body diagram.a) Apply Newton’s 2nd law...
- Q Determine the following rotational quantities. Make assumptionsor estimates where appropriate.A) What is the magnitude of the angular velocity of the Earth inits orbit around the Sun?B) What is the magnitude...
- Q a 1.0 x 103 kg toyota collides into the rear end of a2.2 x 103 kg cadillac stopped as a red light. Thebumpers lock, the brakes are locked, and the...
- Q A physics instructor wants to project a spectrum ofvisible-light colors from 400 nm to 700 nm as part of a classroomdemonstration. She shines a beam of white light through adiffraction...
- Q As simply as you can but with complete and comprehensive detail,state and explain each of Newtons Three Fundamental Laws ofMotion. After you have explained all Three Laws look comeup with...
- Q Now let's consider the impulse associated with kicking a soccerball (Figure 1). The ball has mass 0.40 kg . Initially it moveshorizontally to the left at 20 m/s, but then...
- Q Suppose that an event occurs in the reference frame S withcoordinates x = 2m, y = 0m and z = 0m at t = 4m/c. The frame S’moves in the...
- Q The trajectory of a rock thrown from a height with an initialspeed of 19.7 m/s is shown in the figure below. Evaluate themagnitude of the gravitational field at the surface...
- Q Which of the following inertial reference frames areproper frames for the two events listed? Choose all thatapply.RED FRAME: Event A happened at a differentplace than event B.ORANGE FRAME: Event C...
- Q How do you determine what velocity and angle is needed so thatboth the x and y displacement are equal to each other at a specificpoint?For example if a projectile is...
- Q List two ways you can increase the linear velocity ofa point on a rotating body.Which factors can you control?Which one would have the biggest impact?Why?
- Q A pitcher rotates his arm to throw a baseball. The distance fromthe centre of rotation of the pitcher's arm to his hand is 110 cmand remains constant over the throw....
- Q A 200-g ball is dropped from rest from a height of 1.4 m. Itbounces and returns to the same position.  a) What is the change in momentum between the two points?b)...
- Q Write out the matrix based on the secular equations for benzeneusing the huckel approximation.
- Q Two charges are placed along the x axis such that charge A is at-3 m, and has a charge of 2.5e-06 C. Charge B is at 2.2 m, and hasa...
- Q How the concentration polarization occurs in galvanic andelectrolylic cells (in details)mechanism of each cell
- Q 1. At what speed does a 1700 kg compact car have the samekinetic energy as a 1.80×104 kg truck going 23.0 km/hr?2.The cable of a crane is lifting a 850...
- Q How much horsepower would a car need to tow a boat up the DavisDam Grade Climb?Pro TipsDavis Dam assumed grade = 7%Air density is sea level conditions (.002377 slugs/f^t3)w(weight) of...
- Q Concentrated solar power is a method of using the Sun's light toproduce useful energy on Earth. A large system of mirrors collectslight during the day and focuses it on a...
- Q Wrap up question 1: You hold a “Top†piece of charged tape nearan uncharged soda can. Describe the behavior of the tape. Would thebehavior be different if you used a...
- Q The average net torque Justin exerts on a discus about its axisof spin is 100 Nm during a throw. The mass of the discus is 2 kg,and its radius of...
- Q A 7.25-kg bowling ball moving at 8.65 m/s collides with a0.75-kg bowling pin, which is scattered at an angle of θ = 85.5°from the initial direction of the bowling ball,...
- Q Describe the two laws of Kirchhoff’s and the Faraday law withgraphs
- Q Place 4 charges at the corners of a square which is 2 meters by2 meters (4 large squares along each length). Place two +1 nCcharges at adjacent corners and two...
- Q You stand 17.5 m from a wall holding a tennis ball. You throwthe tennis ball at the wall at an angle of 38.5 ∘ from the groundwith an initial speed...
- Q describe the different changes in the orbit of the Earth around thesun including their periodicity?
- Q If the mass of the charge is very small (mass = 2.9×10^-25kg) sothat its weight (weight in Newtons = mass in kg × 9.8 m/s2) isnegligible compared to the electric...
- Q A 0.046-nm x-ray is incident on a stationary electron. Ascattered photon is observed at 94°.Find the energy of the scattered photon E'γ=______ keV and its wavelength λ'= _________ nmFind the...
- Q A diverging lens (f = -20cm) is placed 10cm to the left of aplane mirror. A match stick is placed 25cm to the left of the lens.(I) Where is the...
- Q 4/ You are operating a fan with the characteristics shown in thefigure below. The 25 kW fan currently operates continuously at fullspeed with the flow reduced to 90% of its...
- Q Explain the importance of having understanding of the physics orchemistryof failure mechanisms when one is doing accelerated lifetesting.
- Q What is the difference between Q and q? Under what assumptionsis investment solely a function of q? what is the differencebetween the capita Q and small q in investment function
- Q (2) Please show that a discontinuity arises in the firstderivative of the wave function of the infinitepotential well (0 to L).
- Q A bicycle racer sprints at the end of a race to clinch avictory. The racer has an initial velocity of 13.0 m/s andaccelerates at the rate of 0.600 m/s2 for...
- Q Introduce hydraulic loss   into the Bernoulliequation to account for the energy lost by the water flowingthrough the small horizontal pipe. Derive the expression for thehydraulic loss by considering two points at...
- Q Using plane waves, find the Fresnel and Snellformulas. (Reflection and refraction).Show that in a vacuum plane waves propagateorthogonally to each other, and are transverse to the direction ofpropagation
- Q Can a free particle be normalised? Explain your answer?
- Q I need proper answers for the following ( well explained andunderstandable writing)1. A long, vertical, metallic wire carries downward electriccurrent. (i) What is the direction of the magneticfield it creates...
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