Physics question and answers for September 09, 2023
- Q For hydrogen, an ionized helium ion He+, and a doublyionized lithium ion Li2+, calculate:(a) The radii of the first and second Bohr orbits and thevelocities of electrons in these orbits.(b)...
- Q An electric vehicle starts from rest and accelerates at a rateof 2.4 m/s2 in a straight line until it reaches a speedof 27 m/s. The vehicle then slows at a...
- Q A retaining wall against a mud slide is to be constructed byplacing 1.2 m-high rectangular concrete blocks (Ïconcrete = 2700kg/m3 ) side by side, as shown in Figure 1. The...
- Q On level ground a shell is fired with an initial velocity of36.0 m/s at 58.0 ∘ above the horizontal and feels no appreciableair resistance. ((INCLUDE ALL ANSWER WITH THE UNITS...
- Q Industrial espionage on a distance planet (temperature andï²atmosphere is unknown) provides the information that successiveresonances in a pipe are 210 and 294 Hz. The pipe is 5 m long, butit’s...
- Q Use your own words to answer the following questions. Please nohandwriting.Determine what conditions should be considered when implementingpassive vs. active cooling techniques.Describe the advantages of absorption cooling that occurs in...
- Q A thin film suspended in air is 0.400 µm thick and isilluminated with white light incident perpendicularly on itssurface. The index of refraction of the film is 1.58. At whatwavelength...
- Q Astronauts on a distant planet toss a rock into the air. Withthe aid of a camera that takes pictures at a steady rate, theyrecord the height of the rock as...
- Q two stationary positive point charges, charge 1 of magnitude3.70nC and charge 2 of magnitude 1.50nC , are separated by adistance of 39.0cm . An electron is released from rest at...
- Q Consider two coherent monochromatic sources of light ofwavelength (lambda) centered at the origin and located at (0, 0,-d)and (0,0,+d). Show that the locus of points, satisfying either thecondition for constructive...
- Q To be rescued from the roof of a burning building, a62-kg manmust be able to jump straight up and catch hold of a rope ladderhanging from a helicopter. He has...
- Q Neglecting any drag, describe the energy transfers andtransformations involved when a yo-yo is thrown downward, reachesthe end of the string, and then climbs back up the string to becaught. If...
- Q A mass of 6 kg is placed on an incline with a coefficient ofstatic friction of 1.80 and coefficient of kinetic friction of1.28. No additional forces are acting on it...
- Q Two solenoids are nested coaxially such that their magneticfields point in opposite directions. Treat the solenoids as ideal.The outer one has a radius of 20 mm, and the radius of...
- Q An insect 3.85 mm tall is placed 22.6 cm to the left of a thinplanoconvex lens. The left surface of this lens is flat, the rightsurface has a radius of...
- Q A skater glides along a circular path of radius 7.40 m.1-If he coasts around one half of the circle, find the magnitudeof the displacement vector.2-What distance has the person skated?3-If...
- Q PLEASE WRITE THIS IN THE COMPUTER:Include the solution of the problems with the whole procedureclear, complete and organized.Solve:3. What is the intensity level in decibels for an intensitysound wave of...
- Q A sound wave has a propagation speed of 349 m/s, a frequency1026 Hz, and has a maximum displacement of ym=3.02x10-7 m. At time t= 0, and x= 0, the displacement...
- Q If you pour 0.0350 kg of 25.0°C water onto a 1.18 kg block ofice (which is initially at −15.0°C), what is the final temperature(in °C)? You may assume that the...
- Q A firefighter directs a stream of water toward a burningbuilding from the ground level. The stream of water leaves theground with Velocity Vi, given that Vi=21.0 m/s and theta initial=37.5...
- Q What are the advantages and disadvantages of connectingbatteries in series, and what are the advantages and disadvantagesof connecting batteries in parallel?
- Q You are standing on a sheet of ice that coversthe football stadium parking lot in Buffalo; there is negligiblefriction between your feet and the ice. A friend throws you a0.370kgball...
- Q A metal sphere carrying an evenly distributed charge will havespherical equipotential surfaces surrounding it. Suppose thesphereâs radius is 52.5cmand it carries a total charge of +1.45μC.A) Calculate the potential of...
- Q 3. Does the magnetic field due to the Earth affect your resultof the e/m ratio? Explain�4. Compare trajectories of electrons and protons moving with thesame speed in the magnetic field...
- Q 1.What does the \"Total Energy -Time\" graph tell you about the toal energy of the ball as itfalls?2.What is one reason that some ofthe energy is lost as the ball...
- Q If you travel by starship to the center of the galaxy, such thatyou arrive within a subjective human lifespan, how much radiationdamage will you suffer from the interstellar “vacuum†(i.e.,...
- Q A laboratory cell with volume of 0.007769 ft3 contains 0.001941lb-moles mixture given in the table below. Temperature is to beraised to 80OF, using Soave-Redlich-Kwong (SRK) equation of statecalculate the expected...
- Q Define tensile strength. Explain how polymers are characterizedvis-Ã -vis differences in tensile stress-strain behavior.
- Q Air flows through this tube at a rate of 1400cm3/s . Assume thatair is an ideal fluid.What is the height h of mercury in the right side ofthe U-tube?
- Q youhave a parallel-plate capacitora.) determine the electric field between the plates if thereis a 120 V potential dofference across the plated and they areseparated by 0.5 cmb.) A spark will...
- Q A tall tree is growing across a river from you. You would liketo know the distance between yourself and the tree,as well as itsheight, but are unable to make the...
- Q A proton beam is used to irradiate a tumor. The beam is createdstarting with hydrogen gas, ripping off the electrons, andextracting the protons in an electric field. The protons areaccelerated...
- Q Two 14-cm-diameter electrodes 0.44 cm apart form aparallel-plate capacitor. The electrodes are attached by metalwires to the terminals of a 20 V battery.A. What are the charge on each electrode,...
- Q The tallest cliffs ever discovered in our solar system arelocated on Uranus’s moon Miranda (g=0.0772 m/s^2 ). If you were todrop a rock off of one of these cliffs, it...
- Q In a belt drive the motor pulley has a diameter of 250 mm androtates at 420 RPM. The machine pulley diameter is 350mm.a) Determine the linear velocity of the belt...
- Q Consider a 80.0-kg man standing on a spring scale in anelevator. Starting from rest, the elevator ascends, attaining itsmaximum speed of 1.36 m/s in 0.700 s. It travels with this...
- Q Find the angular speed of the turntable after the parachutistlands.(Assume that you can treat the parachutist as aparticle.)
- Q Match each statemet with one of the following optionsA: ... the sameB....the same1When two or more different resistors are connected in series toa battery, the current through each is…2When two...
- Q Collisions in 1-DOne cart with some mass Mc travels without friction on a 1-D tackat a speed of 1.75 m/s. Another cart sits at rest some distancealong the track. The...
- Q A nuclear power reactor produces 3GW of thermal power from thefission of 235U for a period of 10 weeks and then it is shut down.Note: All numerical answers are expected...
- Q Do this problem by making a neat, precise scaled drawing, usinga ruler and protractor, ready to be turned in at the start of ournext class. NOTE: \"azimuth\" means compass direction....
- Q A pendulum 2.20 m long is released (from rest) at an angle?0=30.0?. (Figure 1)Part ADetermine the speed of the 50.0 g bob at the lowest point(?=0).Express your answer with the...
- Q David is driving his prius on the freeway and reaches his exit.The exit has a radius of curvature of 25 m and is banked at 38degrees. How fast can David...
- Q Firemen are shooting a stream of water at a burning building. Ahigh-pressure hose shoots out the water with a speed of 27.0m/s asit leaves the hose nozzle. Once it leaves...
- Q When you calculate the net electric field in a location due tothe presence of more than one large charge (Q), it is generally nothelpful to include the sign of the...
- Q 1.) What is the Hall effect, give a real life example, list itsapplications.2.) When an electric light bulb is operated on a low frequencyAC, they noticeably flicker (for example 5Hz)...
- Q 1. Use basic laws of physics to explain the followingsituations:a. Spiderweb has a greater tensile strength than steel, yet youcan snap a spider web very easily with your hand. Explain...
- Q One billiard ball is shot east at 1.9m/s . A second, identicalbilliard ball is shot west at 0.90m/s . The balls have a glancingcollision, not a head-on collision, deflecting the...
- Q is astronomy based on probability and chance? Are certain lawswell defined, and verified through experimentation?
- Q 20 km east plus 10 km northeast
- Q Moon effect. Some people believe that the Moon controls theiractivities. If the Moon moves from being directly on the oppositeside of Earth from you to being directly overhead, by whatpercentage...
- Q When a potential difference of 142 V is applied to the plates ofa parallel-plate capacitor, the plates carry a surface chargedensity of 45.0 nC/cm2. What is the spacing between the...
- Q I need an in depth, thorough explanation of static electricityand the relevant related topics!
- Q A concave mirror (f = 44 cm) produces an image whose distancefrom the mirror is one-fourth the object distance. (a) Determinethe object distance. cm (b) Determine the (positive) imagedistance. cm
- Q Calculate the total kinetic energy of the reaction products inthe reaction 13C(d,n)14N ifthe incident d particle has KE = 3000 keV?(in MeV)
- Q Two small nonconducting spheres have a total positive charge of108.4uC. When placed 1.08m apart, the force each exerts on theother is 12.8N and is repulsive. What is the (larger) charge...
- Q Calculate the moment of inertia of a baseball bat for thefollowing cases. (a) Assume the bat is a wooden rod of uniformdiameter and take the pivot point to be in...
- Q A homemade capacitor is assembled by placing two9-in.pie pans 4cmapart and connecting them to the opposite terminals of a6-Vbattery.Part A:Estimate the capacitance.C= ??VPartB:Estimate the charge on each plate.Q= ?? CPart...
- Q An open container holds ice of mass0.565kgat a temperature of -13.5?C. The mass of the container can be ignored. Heatis supplied to the container at the constant rate of740J/minute.The specific...
- Q A 0.460-mol sample of an ideal diatomic gas at 404 kPa and 276 Kexpands quasi-statically until the pressure decreases to 168 kPa.Find the final temperature and volume of the gas,...
- Q When you look through a fish tank at someone on the other side,you only see a reflection of the fish in the tank. However, theother person can see you clearly....
- Q An object falls from a height h from rest. Ifit travels a fraction of the total height of 0.5833 in the last1.00 s, find the time of its fall.Find the...
- Q 1. If you had a meter to investigate the electric power systemin your home, what voltage would you measure for the electricitycoming into your home? What frequency is the power...
- Q You have two carts, a force probe connected to a computer, amotion detector, and an assortment of objects of different masses.Design three experiments to test whether momentum is a conservedquantity....
- Q is it possible to identify different types of quasars based onits color? please provide a refrence so i can read into it more
- Q A particle with a charge of -60.0 nC is placed at the center ofa nonconducting spherical shell of inner radius 20.0 cm and outerradius 36.0 cm. The spherical shell carries...
- Q A crow is flying horizontally with a constant speed of 3.00 m/swhen it releases a clam from its beak. The clam lands on the rockybeach 2.40s later. Consider the moment...
- Q Now, let
- Q A diffraction grating has 2605 lines per centimeter, and itproduces a principal maximum at = 29.2°. The grating is used withlight that contains all wavelengths between 410 and 660 nm....
- Q Howdo you get from Power = work/time to Power = v^2/r ?
- Q 3. Refer to Ch 4, pg 132- 4 in BM. We are going to calculate thevelocity of the Earth today (let’s say 7 Feb 2020) using the visviva equation. Take...
- Q A thin-walled metal spherical shell of radius a = 1.80 cm has acharge qa = 8.00×10-6C. Concentric with it is a thin-walled metalspherical shell of radius b = 5.20 cm...
- Q An artillery shell is fired with an initial velocity of 300 m/sat 52.0° above the horizontal. To clear an avalanche, it explodeson a mountainside 47.5 s after firing. What are...
- Q I intend to start making visual observations, and I want to knowmore about the difference between using barlow lenses and one ortwo eyepieces and using a complete kit of eyepieces,...
- Q . What ethical consequences did the scientists involved have toconsider while working    on the atomic bomb?
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