Physics question and answers for August 26, 2023
- Q A basketball player grabbing a rebound jumps 78 cm vertically.How much total time (ascent and descent) does the player spend (a)in the top 12 cm of this jump and (b)...
- Q Point charges of 6.75 µC and−4.00 µCare placed 0.300 m apart. (Assume the negative charge is locatedto the right of the positive charge. Include the sign of the valuein your...
- Q An unknown positive point charge is placed at x = -0.27 m, y = 0m, a charge of -2.8 micro-coulombs is placed at x = 0 m, y = -0.20m,...
- Q 1. What is light? 2. What are the three models of light? 3. Whenis each model of light applicable? 4. What is visible light? 5.What is white light? 2-3 sentences...
- Q A person measures her heart rate by counting the number of beatsin 30 s. If 42 ± 1 beats are counted in 30.0 ± 0.5 s, what is theheart rate...
- Q A 2100-m-high mountain is located on the equator.How much faster does a climber on top of the mountain move thana surfer at a nearby beach? The earth's radius is 6400...
- Q Whyare superconductors not used to transmit power? If superconductorswere available at the time of Edison and Tesla, would Edison havewon the energy battle? What would change if superconductors couldbe used...
- Q When the police want to know how fast your car is going, theyshoot a \"radar gun\" at the car. The radar gun emits waves atapproximately 24.15 GHz. Those waves reflect...
- Q In uniform circular motion, which of the following quantitiesare constant?a.) the tangential component of accelerationb.) the radial component of accelerationc.) speedd.) instantaneous velocitye.) the tangential component of velocityWhich of these...
- Q a parallel-plate capacitor is oriented horizontally and chargedso that there is an electric field of 50,000 V/m pointing up insidethe gap of 1cm, which is filled with air. a.) With...
- Q Please do step by step clear and show eqations used. ThankyouA rocket designed to place satellites into orbit is carried to acruising altitude. When the plane is flying in a...
- Q 13.18 Two piano strings with the same mass and the same lengthare to be tuned to 440 Hz (A on the equal temperament scale). Onestring, with a tension of 300...
- Q I have done the first part of this problem, but I cannot figureout the second part. I know there are several different answersalready posted on Chegg for this particular problem...
- Q Use principles of physics to solve the problem and then verifyyour answer using the simulation. Assume that the acceleration dueto gravity has a magnitude of g = 9.80 m/s2. If...
- Q A person walks due north for 1 km then west for 1.5km thensouthwest for 2.5km. Draw each displacement then find the totaldisplacement using head to tail method.An Airplane flys southwest...
- Q Two charges are placed on the x axis, +5 μC at the origin and−10 μC at x = 5 cm. (a) Find the electric field on the x axis at...
- Q You are arguing over a cell phone while trailing an unmarkedpolice car by 25.0 m; both your car and the police car aretraveling at 110 km/h. Your argument diverts your...
- Q Two blocks of masses m and 3m are placed on a frictionless,horizontal surface. A light spring is attached to the more massiveblock, and the blocks are pushed together with the...
- Q The position of a 50 g oscillating mass is given byx(t)=(2.0cm)cos(10t−π/4), wheret is in s. If necessary, round your answers to threesignificant figures. Determine:amplitude= 2cmperiod= 0.628sspring constant =5 N/mphase constant=...
- Q A ring of charge with radius R = 2.5 m is centered on the originin the x-y plane. A positive point charge is located at thefollowing coordinates: x = 17.1...
- Q there's a triangular prism with sides 8 cm, 10 cm, and 5 cm madeout of material of n = 1.9 is submerged in an aquarium of waterwith n = 1.333....
- Q When a person inhales, air moves down the bronchus (windpipe) at15 cm/s. The average flow speed of the air doubles through aconstriction in the bronchus. Assuming incompressible flow,determine the pressure...
- Q please write in 2 paragraphs for each concepts.. \" The yo-yoworks on two principles, (i) conservation of energy and (ii) Torqueequals the product of Mass moment of Inertia of the...
- Q The electric field midway between two equal but opposite pointcharges is 567 N/C , and the distance between the charges is 16.0cm.a)What is the magnitude of the charge on each?
- Q As defined in Chapter 7, the work done by a force on an objectis equal to the force times the displacement times the cosine ofthe angle between the force and...
- Q In this problem, consider electrostatic forces only. In thefigure, there is a particle of charge +Q at x = 0, and there is aparticle of charge +16Q at x =...
- Q A tower worker at the top of a wind turbine tower is lettingdown a small broken part of mass 4.3 kg tied to a practicallymassless rope.The top of the tower...
- Q Three vectors are given as A=<3.5, -5.3, 1.1> B=<4.5,7.5, -7> C=<-3.9, 4.8, -6>a) Determine the angle between A and B.b) Determine the angle between A and Cc) Compute the dot...
- Q Explain the phenomenon of induction that was studied in thisactivity (bringing a negatively charged plastic rod near anuncharged non-metal-coated styrofoam ball that is hanging freelyand an uncharged metal-coated styrofoam ball...
- Q Two horizontal metal plates, each 10.0 cm square, are aligned1.00 cm apart with one above the other. They are givenequal-magnitude charges of opposite sign so that a uniform downwardelectric field...
- Q 1 (a) Assume that the lights in yourkitchen use 300 watts. How much energy and how much does it cost toleave the lights on 24 hours a day for a...
- Q A damped oscillator has a frequency w' that is 10% less than itsundamped frequency. a) By what factor is the amplitude of theoscillation decreased during each oscillation? b) By what...
- Q A 0.5530-kg ice cube at -12.40°C is placed inside a chamber ofsteam at 365.0°C. Later, you notice that the ice cube hascompletely melted into a puddle of water. If the...
- Q Research 4 types of technology that we have inour world that are related to either magnetism orelectromagnetism. The technology can be directly relatedto these topics or just a snowball effect...
- Q An infinite line of charge with linear density λ1 =7.2 μC/m is positioned along the axis of a thick insulating shellof inner radius a = 2.2 cm and outer radius...
- Q consider an optical fiber having a core index of 1.46 and acladding index of 1.45. a) What is the critical angle for thiscore-cladding interface? B) for what range of angles...
- Q 1). Indicate whether the object will remain in circular motionor not for each case below. Show a calculation as proof. If itdoesn’t stay in circular motion, state what happens to...
- Q The Problem:The air inside an inflatable stand-up paddle board is 68.0°F anda gauge measures the pressure of this air to be 10.0 psi. If thevolume of the air inside the...
- Q A 3.9 g aluminum foil ball with a charge of +4.6×10−9 C issuspended on a string in a uniform horizontal E⃗ field. The stringdeviates to the right and makes an...
- Q An attacker at the base of a castle wall 3.85 m high throws arock straight up with speed 8.00 m/s from a height of 1.50 m abovethe ground. (a) Will...
- Q 1) When people sleep, their metabolic rate is about 2.6 * 10^-4C/(s*kg). How many Calories does a 81 kg person metabolize whilegetting a good night's sleep of 8.5 hrs?2) To...
- Q 1). Physics ). . Place a positive and negative charge on thesame y value, with different x-values.How does the field behave?.Does the field ever point only in the x or...
- Q Question-1 Briefly sketch how Bohr derived the Rydberg’sempirical formula for atomic spectra using mix of classicalmechanics and some ad hoc quantum assumptions. Indicate which stepsin the derivation are motivated by...
- Q Gina pushes a book across a table at constant speed. Fatimalowers a book from a high shelf down to her waist, where it comesto rest. Isidra holds a book at...
- Q To understand the concept of reactance (of an inductor) and itsfrequency dependence.When an inductor is connected to a voltage source that variessinusoidally, a sinusoidal current will flow through the inductor,its...
- Q A 3.9 kg mass is connected to a spring (k=179 N/m) and issliding on a horizontal frictionless surface. The mass is given aninitial displacement of +18 cm and released with...
- Q The speed of sound in seawater is approximately 1480 m/s. Youare at a depth of 50.0m a. You ping the ocean bottom and receivethe echo back 0.125 seconds later. How...
- Q . Active sonar is used to determine the speed of an oncomingsubmarine. You send out a signal with a frequency of 500.0Hz. Yoursubmarine is traveling at 13.0 m/s and the...
- Q Assume air resistance is negligible unless otherwise stated.Calculate the displacement in m and velocity in m/s at thefollowing times for a rock thrown straight down with an initialvelocity of 13.2...
- Q Part 1: Our smoke detectors safe?Part 2: Radon gas is in an insert gas that is not toxic orpoisonous, but is radioactive and emits alpha particles. Why isradon dangerous?Part 3:...
- Q 1.Check your car and find some electric/magnetic components,explain their working principle from physics. Such as battery,generator, alternator, starter, speed sensor, etc. Must list morethan 4 components.
- Q Considering the illustrations for Concave and Convexmirrors.Prove using geometry that the reflected rays reach the focalpoint f=R/2 in the limit as the incoming rays approach theprincipal axis.Hint: Consider the triangle...
- Q An object is moving along a straight line, and the uncertaintyin its position is 2.20 m. (a) Find the minimum uncertainty in themomentum of the object. Find the minimum uncertainty...
- Q 19.How is the probability of something defined in terms ofmicrostates and macrostates?Quantum variation in macrostatesNumbers of alternate realitiesFraction of macrostates containing a microstateProportion of microstates that are in a macrostate20.What...
- Q A hockey puck slides on the ice with an initial velocity of vi1= 5 m/s in the positive x direction. A second hockey puck issliding to the left with an...
- Q If you were to replace the ocean with or mercury or oil, whichworks best for a boat's ability to float?. Thank you.
- Q Two rods, one made of brass and the other made of copper, arejoined end to end. The length of the brass section is 0.500 m andthe length of the copper...
- Q 1) A mover pushes a 5.87 kg box with a 48.1 N constanthorizontal force up a 14.9° ramp that has a height of 2.56 m. Ifthe ramp is assumed to...
- Q A 6.0 kg freshwater fish at the surface of a lake is neutrallybuoyant.If the density of its body with its swim bladder deflatedis 1060 kg/m3, what volume of gas must...
- Q Compare and contrast the eye and a camera. What parts of thecamera correspond to the iris, the retina, and the cornea of theeye?
- Q 1.) A 1.00m long, 5.00kg rod is held at one end. How much torqueis generated by the bar? What happens to the torque if the massremains consant but the length...
- Q This week two big concepts discussed are electric fields andelectric potential, with electric potential being the basis forvoltage. Along with the general discussion of these concepts, someinteresting and common applications...
- Q Suppose you are viewing some red light coming from a galaxy far,far away. The wavelength of the red light is expected to be 6300 nmif the relative speed of the...
- Q Compare and contrast alpha and beta decay.What type of decay should 32Si undergo, and why?
- Q A cube with side length L, and density ÏC sits atrest on a bathroom scale at the bottom of a large tank. The tank ispartially filled with a fluid having...
- Q Red light of wavelength 675 nm is incident on a slit of width4.56 × 10−6 m. An observing screen is placed 1.50 m from theslit.9a) Find the distance between the...
- Q A 2.18e-9 C charge has coordinates x = 0, y = −2.00; a 2.76e-9 Ccharge has coordinates x = 3.00, y = 0; and a -4.95e-9 C charge hascoordinates x...
- Q Consider a point charge +q. A) Sketch the electric field lines andequipotetial lines near the charge. B) Explain how to interpretthese equipotential lines. In other words, what does electricpotential mean...
- Q 1-A bullet moving horizontally with a speed of 600 m/s strikes asandbag and continues for a distance of 20 cm.A-What is the average acceleration of the bullet?B-How long does it...
- Q Compare and contrast the relativistic and classical expressionsfor the kinetic energy of an object.How does the relativistic expression explain the impossibilityof an object to reach the speed of light?
- Q Retrograde motion of superior planet always occurs when theplanet is a) in conjunction with the moon b)brighter than averagec)near the autumnal equinox d) near a solstice e) dimmer thanaverage 2)...
- Q In the 2016 Olympics in Rio, after the 50 m freestylecompetition, a problem with the pool was found. In lane 1 there wasa gentle 1.2 cm/s current flowing in the...
- Q Two identical point charges, each of charge +2.00x10-6 C andmass 7.00x10-6 kg , are fixed on the y-axis at the points (x,y) =(0, +3.00) meters and (x,y) = (0, -3.00)...
- Q Gayle runs at a speed of 3.30 m/s and dives on a sled, initiallyat rest on the top of a frictionless snow-covered hill. After shehas descended a vertical distance of...
- Q A block with mass m1 = 9.4 kg is on an incline with an angle θ =34° with respect to the horizontal. For the first question there isno friction between...
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