Physics question and answers for August 27, 2023
- Q An green hoop with mass mh = 2.8 kg and radiusRh = 0.12 m hangs from a string that goes over a bluesolid disk pulley with mass md = 1.9...
- Q In the figure, a conducting rod of length L = 29.0 cm moves in amagnetic field B⃗ of magnitude 0.390 T directed into the plane ofthe figure. The rod moves...
- Q An ice cube whose mass is 50 g is taken from a freezer at atemperature of -10C and then dropped into a cup of water at 0C. Ifno heat is...
- Q Assume that the firework has a mass of m_0 =0.30~\text{kg}m​0​​=0.30 kg and is launched from a cannonat an angle of \theta_0 = 41.8^\circθ​0​​=41.8​∘​​ with aninitial velocity of | v_0 |...
- Q The tires of a car make 77 revolutions as the car reduces itsspeed uniformly from 92.0 km/h to 60.0 km/h. The tires have adiameter of 0.84 m.1. What was the...
- Q Consider an electron in a hydrogen atom in the n=2,l=0 state. Atwhat radius ( in units of a0) is the electron most likely to befound?
- Q please rephrase/ rewrite this paragraph and you can add your ownideasThe idea of using the sun’s energy was thought of the late 1870when two American scienists became interested in the...
- Q What are some threshold concepts in Electricity and MagnetismPhysics? Use the characteristics of threshold concepts to supportyour reasoning.
- Q A particle of mass 4.00 kg is attached to a spring with a forceconstant of 300 N/m. It is oscillating on a horizontal frictionlesssurface with an amplitude of 5.00 m....
- Q The air pressure inside the tube of a car tire is 353 kPa at atemperature of 14.0 °C. What is the pressure of the air, if thetemperature of the tire...
- Q please rephrase/ rewrite this paragraph and you can add your ownideasIt has become clear that at this point sustainability is themost important aspect of energy production. Perhaps the mostaccessible form...
- Q Objects with masses of 140 kg and a 440 kg are separated by0.500 m.(a) Find the net gravitational force exerted by these objects ona 43.0-kg object placed midway between them.Magnitude:(b)...
- Q (a) Estimate the terminal speed of a wooden sphere (density0.790 g/cm3) falling through air, if its radius is 7.50 cm and itsdrag coefficient is 0.500. (The density of air is...
- Q Now consider the collision represented in the animation below.Let's assume that the two balls are sliding on a frictionless,horizontal surface. Do not assume that this collision is elastic(though it might...
- Q 1. Ablockofmass M = 4kg, cross-sectional area A = 1 m^2, andheight h = 60 cm sits in a liquid with density Ï = 12 kg/m^3.a) Find the depth d...
- Q SLIDING OSCILLATIONS 3 My Notes A block weighing 273 g slidesalong a frictionless track at a speed 8.9 cm/s. It then attaches toa spring-bumper with an electromagnetic device so that...
- Q A transverse sinusoidal wave on a string has a period T = 33.0ms and travels in the negative x direction with a speed of 30.0m/s. At t = 0, a...
- Q A very light string is wound around a cylindrical spool ofinertia M and radius R. The cylinder rotates on a frictionlesshorizontal axis with a moment of inertia 1 2MR2 ....
- Q A heat engine receives an amount of energy Qh= 790kJ by heat transfer from a high temperature thermalreservoir at Th=950 K. Energy is rejected by heattransfer to a lower temperature...
- Q The two blocks, m1 = 2.6 kg andm2 = 4.2, in the figure below are connected bya massless rope that passes over a pulley. The pulley is 12 cm indiameter...
- Q A simple pendulum of length 0.50 m has a 0.30-kg bob. At t = 0,the bob passes through the lowest position in its motion, and atthis instant it has a...
- Q Which of the descriptions below is an example of resonant energytransfer? (Choose all that are correct.)View Available Hint(s)Hint 1.opened hintReview natural frequency and resonance.Which of the descriptions below is an...
- Q During typical urination, a man releases about 400 mL of urinein about 30 seconds through the urethra, which we can model as atube 4.0 mm in diameter and 20 cm...
- Q Determine the most probable interaction for the following: a. 30kev photon on calcium b. 100 kev photon on iodine c. 300 kev photonon water d. 10 Mev photon on lead
- Q please rephrase/ rewrite this paragraph and you can add your ownideas''Power plants all across the country are connected to eachother through the electrical system. These power stations areresponsible for generating...
- Q Examples, please Paired design with repeated measures Paireddesign with matched pairs
- Q Calculate the temperature of a planet. A star has a surfacetemperature of 4000K and a radius of R = 8 × 108 m It has a rocky,airless planet orbiting it...
- Q Suppose the electric field between the electric plates in themass spectrometer of Fig. 20-38 is 2.38 ? 104 V/m and the magneticfields B = B' = 0.66 T. The source...
- Q Very detailed explanation on how a battery operates. The theoryin the internal resistance of batteries, how charge is created,EMF, Electrochemical reaction in batteries, etc.
- Q What is the phenomenon of differential negative resistance(negative differential resistance) and how can it be used inelectronic devices? Please explain it in two or threeparagraphs
- Q A 150-kg satellite is in circular orbit of radius 7.3 Mm aroundEarth. Determine:(a) potential, kinetic, and total mechanicalenergies.(b) the orbital speed.(c) the escape velocity from thisaltitude.
- Q A solid, uniform cylinder with mass 8.25 kg and diameter 10.0 cmis spinning with angular velocity 245 rpm on a thin, frictionlessaxle that passes along the cylinder axis. You design...
- Q Imagine that at some point during the Ice Age a boulder with amass of 380kg rolls off a cliff and onto a smooth (approximatelyfrictionless) glacier so that just before it...
- Q Which one has a larger final entropy, reversible isothermalprocess or reversible adiabatic process when expanding to the samefinal volume for an ideal gas?What do you assume the entropy S for...
- Q Body A in the figure weighs 97 N, and body B weighs 80 N. Thecoefficients of friction between A and the incline are μs = 0.57and μk = 0.23. Angle...
- Q Spectrometer LabSummarize this experiment from purpose to procedure to analysis.Include all important theoretical equations.{¶ ≤ 100 words}
- Q 5. (5)(a) Describe the de Broglie Model (also known as the deBroglie-Bohr Model) of the hydrogen atom.(b) What was its motivation? (To address what problem was itproposed?)(c) What drawbacks did...
- Q In our review of fluids this week, particularly of fluids inmotion, we have come across 3 important rules that govern thatmotion: the continuity equation, Bernoulli's principle, andPoiseuille's principle.Please give an...
- Q A motor with an internal resistance of R(motor) = 50 Ohmsrequires a potential difference of V(motor)=20V to work properly.As you don't have a 20V power source, you place two 12V...
- Q What force, applied tangentially to the Earth along 45° oflatitude in the direction of rotation for 1 day would result in anew day length that is shorter by 5.2 seconds?...
- Q A 3 kg object is moving along the +y+y direction with aspeed of 4 m/s when it experiences an impulse of5i^−8j^5i^−8j^ Ns. What is the object's speedafter the impulse is...
- Q list at least two weaknesses of using sound to imagean object. can these weaknesses be overcome, how?
- Q 0-9. GREENHOUSE EFFECTCO2 passes short wave length light (visible) but blocks long wavelengthradiation (IR). Explain how adding CO2 to an atmosphere increasesthesurface temperature of a planet. Consider the temperature of...
- Q Show that angular momentum is conserved for a force law F = krand find the allowed orbits.
- Q Compare and contrast the photon nature of light with the wavenature of light, making sure to address the followingproperties:a: colorb: intensityC: energy
- Q Consider the three basic quantities of a circuit: voltage(potential difference), current, and resistance.In general terms, describe each one in your own words and itsbasic characteristic/property, and can you do an...
- Q When light with a wavelength of 215 nm is incident on a certainmetal surface, electrons are ejected with a maximum kinetic energyof 3.33 × 10 − 19 J. Determine the...
- Q Chapter 08, Problem 024. A block of mass m = 1.30 kg is droppedfrom height h = 59.0 cm onto a spring of spring constant k = 1130N/m (see the...
- Q The plane of a rectangular loop of wire with a width of 5.0 cmand a height of 8.0 cm is parallel to a magnetic field of magnitude0.22 T . The...
- Q In Example 2.6, we considered a simple model for a rocketlaunched from the surface of the Earth. A better expression for arocket's position measured from the center of the Earth...
- Q The intensity of sunlight under the clear sky is 1030 W/m2 . Howmuch electromagnetic energy is contained per cubic meter near theEarth’s surface? The speed of light is 2.99792 ×...
- Q 1) Because of the mass involved in constructing and transportinga lander, the first human expedition to Mars will likely be anorbital mission. A geosynchronous orbit seems plausible, allowingastronauts in the...
- Q Starting from rest, a disk rotates about its central axis withconstant angular acceleration. In 4.00 s, it rotates 13.2 rad.During that time, what are the magnitudes of (a) the angularacceleration...
- Q A shell is launched at angle 62° above the horizontal withinitial speed 30 m/s. It follows a typical projectile-motiontrajectory, but at the top of the trajectory, it explodes into twopieces...
- Q how might a sonogram tech encounter heat, heattransfer, and/or thermal expansion?
- Q A point charge with a mass of 1.81 ng and a charge of +1.22 ?Cmoves in the x-y plane with a velocity of 3.00 x104 m/s in a direction 15°...
- Q Ice at −14.0 °C and steam at 142 °C are brought together atatmospheric pressure in a perfectly insulated container. Afterthermal equilibrium is reached, the liquid phase at 50.0 °C ispresent....
- Q Bubba (m=100kg) and Sally (m=60kg) are playing on amerry-go-round. Treat the merry-go-round as a disk with mass 100 kgand radius 1.3 m. Both Bubba and Salley are at the edge...
- Q 1.How deep can a submarine that is able to support a gauge pressureof 20atm dive in the ocean (r1g1=1.02)?2.A balloon weighs 150 N and carries a gondola, gear, and loadof...
- Q A torque of 36.2 N · m is applied to an initially motionlesswheel which rotates around a fixed axis. This torque is the resultof a directed force combined with a...
- Q A cart of mass m1 = 5.69 kg and initial speed = 3.17 m/scollides head-on with a second cart of mass m2 = 3.76 kg, initiallyat rest. Assuming that the...
- Q Arope is wrapped around the rim of a large uniform solid disk ofmass 155 kg and radius 2.50 m. The horizontal disk is made torotate by pulling on the rope...
- Q A 5.1 cm diameter horizontal pipe gradually narrows to 2.5 cm .When water flows through this pipe at a certain rate, the gaugepressure in these two sections is 35.0 kPa...
- Q A bullet flies horizontally, hits a wooden block suspended froma 1.0 m string, and gets stuck in the block. The angle of deviationof the string equals 11 degrees. The mass...
- Q A transverse wave propagates in a very long wire of mass perunit length 4 x 10^3 kg/m and under tension of 360 N. An observernext to the wire notices 10...
- Q 1. Engineers are designing a rocket to be used in deep space. Ifthe rocket is fired from rest in deep space, the total mass of therocket, payload, and unspent fuel...
- Q You are pushing a sled in which your little sister is seated upa 26° slope (one that makes an angle of 26° with the horizontal).If the mass of the sled...
- Q Will a copper wire or an aluminum wire give the larger currentto weight ratio for high voltage transmission lines if both wiresare to have the same resistance between any two...
- Q A parallel-plate capacitor is made from two aluminum foilsheets, each 5.4 cm long and 4.9 cm wide. The two sheets areseparated by a distance of 0.024 mm.1)What is the capacitance...
- Q 8) What is the distance to a particular star system measured byan observer in a rocket ship traveling to the star system with aspeed of 0.95c? (The distance is 37...
- Q explain in physics how the eye works and explain physics causingcommon vision defects and explain the physics of how they arecorrected
- Q As part of an experiment in physics lab, small metal ball ofradius r = 2.3 cm rolls without slipping down a ramp and around aloop-the-loop of radius R = 3.4...
- Q A solid, homogeneous sphere with a mass of m0, a radius of r0and a density of Ï0 is placed in a container of water. Initiallythe sphere floats and the water...
- Q A 11.4-kg block rests on a horizontal table and is attached toone end of a massless, horizontal spring. By pulling horizontallyon the other end of the spring, someone causes the...
- Q The mass of the moon is 7.34 × 1022 kg, and its radius is about1.74 × 106 m(a) What is the value of “gmoonâ€, that is, the acceleration ofgravity for...
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