Physics question and answers for August 24, 2023
- Q A piano wire 0.90 m long and 0.85 mm in diameter is fixed on oneend. The other end is wrapped around a tuning peg 3.5 mm indiameter. Initially the wire,...
- Q A 1 mole, 293 K gas expands isothermally, starting at 22.4 L involume. What is its final volume? Only solve with variables, notnumarically.
- Q Please write 3 paragraphs on the following topic: Piezoelectriccrystals and how they function in the ultrasound transducer toprovide an image for the sonographer and the difference betweencontinuous wave and pulsed...
- Q 1) Describe the basic principles of Fluorescence CorrelationSpectroscopy (FCS). What do you measure in an FCS experiments andhow do you perform the measurements.
- Q In which situation is mechanical energy conserved?A. a parachutist descends at constant speedB. a car slows down without braking along a flat roadC. a heavy crate is raised at constant...
- Q Block 1 (0.5 kg) travels withan initial velocity of [ 40i ] +[ 60j ] m/s and then collides with block2 (0.5 kg) traveling with an initialvelocity of [ -40i...
- Q What will be the difference in SIL of the sounds from twoloudspeakers, one with an efficiency of 2.1% and one with anefficiency of 10.3%. Assume that all other variables, including...
- Q Question 1: At a height of ten meters above the surface of afreshwater lake, a sound pulse is generated. The echo from thebottom of the lake returns to the point...
- Q You drop a 2.00 kg book to a friend who stands on the ground atdistance D = 12.0 m below. Your friend's outstretched hands are atdistance d = 1.80 m...
- Q Two slits of width 2 μm, each in an opaquematerial, are separated by a center-to-center distance of 6μm. A monochromatic light of wavelength450 nm is incident on the double-slit. One...
- Q Suppose that a parallel-plate capacitor has circular plates withradius R = 60.0 mm and a plate separation of 4.6mm. Suppose also that a sinusoidal potential differencewith a maximum value of...
- Q We have to calculate the value of Power of an electric DC motorIN WATTS made from scratch. The only known values that we have are:The Voltage (V) which is 9V...
- Q A uniform thin rod of length 0.812 m is hung from a horizontalnail passing through a small hole in the rod located 0.043 m fromthe rod\'s end. When the rod...
- Q A long solenoid has 110 turns/cm and carries current i. Anelectron moves within the solenoid in a circle of radius 2.54 cmperpendicular to the solenoid axis. The speed of the...
- Q A 5.5 F capacitor is charged to 35 V and is then connectedacross a 12-mH inductor. (a) How much energy is stored in thesystem? J (b) What is the frequency...
- Q List and describe three real life situations in which ispossible to experience centripetal force.
- Q A projectile is launched with initial velocity of 11 m/s at 30.5degrees above the horizontal. - find the x-component of the initialvelocity: - find the y-component of the initial velocity:
- Q A circular circuit of radius 30 cm is built to rotateabout apair of insulating posts. The circuit consists of a 100voltbattery, two 25 kW resistors inparallel and one 75 kWresistor...
- Q An electric motor is a device that transfers electrically storedenergy into kinetic energy. A very crude one would consist of aconducting wire shaped as a loop with a steady electric...
- Q Is the acceleration of Mars' acceleration much greater than thatof the Earth (encircling their orbit around the sun)? Justify youranswer.The mass of Pluto was unknown until it was discovered that...
- Q Two 78.5-kg hockey players skating at 6.47 m/s collide and sticktogether. If the angle between their initial directions was 115 ∘,what is their speed after the collision?
- Q Provide a, minimum, 250 word explanation of resonance and hot itapplies to today's MRI (Magnetic Resonance Imaging) technnique usedin medicine. Include example equations for solving for resonance inyour explanation.Must be...
- Q Mountain pull. A large mountain can slightly affect thedirection of “down†as determined by a plumb line. Assume that wecan model a mountain as a sphere of radius R =...
- Q An electron part of a plate that integrates an array ofparallel plates loaded and with a small separation (vertical). Thespeed of the electron is 1.63 x 10 ^ 4 m...
- Q At the surface of a lake, the pressure is 1 atmosphere. What isthe total pressure at a depth of 850m in water?
- Q A 22.0 μF capacitor is charged by a 160.0-V powersupply, then disconnected from the power and connected in serieswith a 0.240-mH inductor.Calculate the energy stored in the inductor at t...
- Q Exercise 2: Using the Relativistic EnergyMomentum relationship ?2 = ?2?2 +?2?4 and the de-Broglie relationships ? = â„?and ? = â„? with ? the angular frequency and ? the wave...
- Q Exercise 1: A positronium is a bound electronpositron state, where the electron is rotating around a positronrather than a proton. Prove that in a positronium bound state:a) The transition energy...
- Q Water falls without splashing at a rate of 0.400 L/s from aheight of 3.60 m into a 0.530-kg bucket on a scale. If the bucketis originally empty, what does the...
- Q A uniform helicopter rotor blade is 8.97 m long, has a mass of104 kg, and is attached to the rotor axle by a single bolt.(a) What is the magnitude of...
- Q The Boyle’s Law and theGay-Lussac’s Law express experimental relationships between two ofthe three parameters characterizing the state of gas, the pressure,volume, and temperature, while the third is kept constant. For...
- Q A 90 kg student jumps off a bridge with a 10-m-long bungee cordtied to his feet. The massless bungee cord has a spring constant of390 N/m. You can assume that...
- Q 1. Three identical resistors are connected in parallel to asingle battery. The current through the resistors must be...a. one-third of the current through the battery.b. the same for the resistors...
- Q In February 1955, a paratrooper fell 370 m from an airplanewithout being able to open his chute but happened to land in snow,suffering only minor injuries. Assume that his speed...
- Q The takeoff speed for an Airbus A320 jetliner is 82 m/s .Velocity data measured during takeoff are as follows: t(s) vx(m/s)0 0 10 23 20 46 30 69What is the...
- Q 1) A 0.490 kg soccer ball is kicked and hits a 2.45 kgstationary tether ball hanging from a 1.49 m tether resulting in aperfectly elastic collision. If the tether ball...
- Q In class we considered the situation of a parcel being warmedisobarically from below by a large thermalreservoir. The parcel has temperature Tp initially and thesurface has temperature Ts. We assumed...
- Q A cylinder of volume 0.240 m3 contains 10.1 mol ofneon gas at 21.6°C. Assume neon behaves as an ideal gas(g) Compute ΔU − W.(i) Compute Q, the thermal energy transfer.
- Q 1. Define the ff:A. Heat-B. Heat capacity-2. Why is it desirable to have the water a few degreescolder than room temperature when the initial temperature istaken?3. Why is the mass...
- Q How many US pennies (mass 2.5 grams) can you stack on an icecube having a mass of 4.20 kg floating in water, before it startsto sink? (let the density of...
- Q Question) In a Hooke's Law and Pendulum experiment, what are thepossible uncertainties or errors that could occur and also howwould you fix them? (min 300 words)
- Q A red ball is thrown down with an initial speed of 1.3 m/s froma height of 27 meters above the ground. Then, 0.5 seconds after thered ball is thrown, a...
- Q 5. You throw a ball into the air. It takes 6.0 ? for the ball toreach your hand.a. Determine the initial speed at which the ball was thrown.b. Determine the...
- Q M, a solid cylinder (M=1.35 kg, R=0.117 m) pivots on a thin,fixed, frictionless bearing. A string wrapped around the cylinderpulls downward with a force F which equals the weight of...
- Q A solid cylinder initially rolling with a translational speed of4.5m/s rolls down a vertical drop of 0.625m. The cylinder has a masof 7.25 Kg and a diameter of 0.115m. Ignore...
- Q Yeti sells their largest cooler, the Yeti Tundra 350 for $1299.99.The Tundra 350 has external dimensions of 24.75 inches by 23.25inches by 63.5 inches with internal dimensions of 16.75 inches...
- Q A solid sphere has a temperature of 674 K. The sphere is melteddown and recast into a cube that has the same emissivity and emitsthe same radiant power as the...
- Q The small spherical planet called \"Glob\" has a mass of6.50×1018 kg and a radius of 5.60×104 m. Anastronaut on the surface of Glob throws a rock straight up. Therock reaches...
- Q Church organs have a set of pipes with different lengths. Withthose different pipes organs can produce sounds over a wide rangeof frequencies. If the lowest frequency produced by an organ...
- Q The first and second formants when you make an \"ee\" vowel soundare approximately 270 Hz and 2300 Hz . The speed of sound in yourvocal tract is approximately 350 m/s...
- Q . You are holding a shopping basket at the grocery store withtwo 0.62-kg cartons of cereal at the left end of the basket. Thebasket is 0.61 m long. Where should...
- Q 1. What is the minimum value of l for a subshell that has 11electrons in it?2. If a hydrogen atom has its electron in the n = 6 state, howmuch...
- Q Q: A child is running at her maximum speed of 4.0 m/s to catchan ice-cream truck, which is stopped at the side of the road. Whenthe child is 20 m...
- Q A uniform thin rod of length 0.778 m is hung from a horizontalnail passing through a small hole in the rod located 0.057 m fromthe rod's end. When the rod...
- Q Oxygenated hemoglobin absorbs weakly in the red (hence its redcolor) and strongly in the near infrared, whereas deoxygenatedhemoglobin has the opposite absorption. This fact is used in a\"pulse oximeter\" to...
- Q A 92.0-N uniform, horizontal board 14.0 m long rests on twosupports, each 1.00 m from theend of the board. A 385-N block is placed on the board 3.00 mfrom one...
- Q TheEarth has an average temperature of 58.3 ÌŠF, and radius of 6.38 x106 m, and an emissivity of 0.986. The Sun has an averagetemperature of 9941 ÌŠF, and radius of...
- Q The energies of the hydrogen atom are quantized by integernumber n from 1 to infinity. This number if called the principalquantum number. Find:a) principal quantum numberb) binding energyc) orbital radiusd)...
- Q What are some advantages and disadvantages of thermaloxidation?
- Q A bug of a known mass m stands at a distance dfrom the axis of a non-uniform spinning disk with radius rand unknown rotational inertia I that is rotating atfi...
- Q Explain the motion of a rattleback. Do not just describe motionExplain the motion.
- Q A car is traveling down the expressway at 31.7 ? with noacceleration. How far has the car? traveled in 3.9 hours? If thespeed limit in such expressway is 70mph, should...
- Q Consider a 4-mg raindrop that falls from a cloud at a height of2 km.Part a) If we neglect air resistance, what would be the speed ofthe raindrop when it reaches...
- Q Why does Gravity Exist? Why is any body able to attract another?Where does that energy emerge from? Is there anything likegravitational repulsion?
- Q why is GaN has wide band gap compare with Si?
- Q What type of measuring device relies on Zeroth’s Law and howdoes it do this?The temperature outside is 0 degrees Fahrenheit. What is thetemperature in Kelvin?An isolated system absorbs a heat...
- Q Derive an expression of the mean free path of a gas moleculeassuming a hard sphere collision. Calculate the ratio of the meanfree path of CO molecules in a vessel at...
- Q a Discuss the difference between the continuous spectrumobtained with a grating and one obtained with a prism. (b). Whichcolor is deviated most in each case? Why?
- Q Why are the higher-order spectra more accurate than thefirst-order spectrum in determining wavelengths of light?
- Q The size of an object parallel to the axis of rotation does notenter into the calculation of its moment of inertia. Why?
- Q Two pendulums have the same dimensions (length {L}) and totalmass (m). Pendulum \texttip{A}{A} is a very small ball swinging atthe end of a uniform massless bar. In pendulum \texttip{B}{B}, halfthe...
- Q 1. The fact that a trumpet and a saxaphone sound different whenplaying the same fundamental frequency is best explained by whichconcept listed below?a. The Doppler Effectb. Sound wave reflectionc. Beatsd....
- Q Picture water flow of four straws, short and fat, short andthin, long and fat, and long and thin.Think about how water would flow through two configurations ofthese same four straws:One...
- Q A block with mass m =7.5 kg is hung from a vertical spring. Whenthe mass hangs in equilibrium, the spring stretches x = 0.25 m.While at this equilibrium position, the...
- Q What is crystal field effect? Please state that in terms of Px,Py, and Pz orbits. (Please briefly description)
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