Physics question and answers for September 17, 2023
- Q Consider a cylindrical coaxial cable. The center conductor issolid with radius R, while the outer conductor is hollow with innerradius a and outer radius b, Both conductors have the same...
- Q Echo times are measured by diagnostic ultrasound scanners todetermine distances to reflecting surfaces in a patient. What isthe difference in echo times (answer in milliseconds) for muscletissues that are 3.414...
- Q A car collides with a truck. The force exerted by the truck onthe car isA)less than the force exerted by the car on the truckB) greater than the force exerted...
- Q A. Starting from the assumption that angular momentum isconserved, prove Kepler's second law, the constancy of arealvelocity.B. Starting from Kepler's first and second laws and Newton'sUniversal Law of Gravity, prove...
- Q A combination lock has a 1.3-cm-diameter knob that is part ofthe dial you turn to unlock the lock. To turn that knob, you gripit between your thumb and forefinger with...
- Q how is chiropractics related to physics, through formulas andexplanation.
- Q Using physics equations, explain why thicker guitar strings makelower notes than thinner guitar strings.
- Q Write the standard momentum equation for one train carcolliding and hooking with another immobile train car if both carshave a mass of M: What type of collision?If the second car...
- Q Renewable sources of energy include photovoltaic,solar thermal electric, wind, geothermal, and hydroelectric. ofthese five types of energy, which one shows the greatest promisefor economic viability over the next 10 years....
- Q what effect will a 0.20 g error (reading is 0.20g lower than theactual value) in reading the amount of Cu in this calorimetryexperiment have on determining the specific heat?
- Q A solenoid that is 91.4 cm long has a cross-sectional area of24.8 cm2. There are 811 turns of wire carrying a currentof 8.08 A. (a) Calculate the energy density of...
- Q A 74 kg soccer player jumps vertically upwards and heads the0.45 kg ball as it is descending vertically with a speed of 26 m/s.If the player was moving upward with...
- Q How are the latent and manifest images made in computedradiography?
- Q A person is riding a bicycle, and its wheels have an angularvelocity of 22.0 rad/s. Then, the brakes are applied and the bikeis brought to a uniform stop. During braking,...
- Q A window washer with a mass of 63.0 kg stands a distance, D =0.600 m, from the left end of a plank of length, L= 2.10 m, with amass of...
- Q A geosynchronous communications satellite in stationary orbit isused to relay radio messages from one point to another around theearth’s curved surface. Apply Newton’s second law to the satelliteto find its...
- Q Q1. A hand grenade of total mass 5kg explodes into three pieces.Two of them, each of mass 1kg, have velocities of 8m/s with anangle of 43° between them. What is...
- Q determine the potential energy stored in a spring if a force of28 holds the spring and it has a spring constant of 97 N/mcompressed.please answer in joules and explain how...
- Q A proton collides elastically with another proton that isinitially at rest. The incoming proton has an initial speed of4.00e5 m/s. The incoming proton has an initial speed of 4.00e5 m/sand...
- Q To get an overview of how a microscope works, complete thedescription with one of the options provided.A simple light microscope consists of two lenses: an objectiveand an eyepiece. The object...
- Q Forparticles incident on a step potential with E<Vo, show that T=0using T+R=1
- Q A 0.40 kg pendulum bob starts with an initial velocity of 2.0m/s is released from a height of0.275 m. It collides at the bottom of its swing with a 1.3...
- Q Snell’s law applies to all waves, not just light. The generalform is sin(?1) /?1 = sin(?2) �2 where ??1 is the speed of thewave in medium 1, and ?2 is...
- Q 1. Please determine the maximum wind speed for a tropicalcyclone with the following wind speeds. NOTE!!! Assume the ambient(external) pressure to be 101.3 kPa (Be sure to remember yourunits)(a) Pressure...
- Q Determine the minimum and maximum impact parameters bmin andbmax for the classical derivation of charged particle collisionalstopping power. Explain the physical meaning of each.
- Q 7. A very long straight wire carries a 12-A current eastward anda second very long straight wire, 42 cm below the first wire,carries a 14-A current westward. The wires are...
- Q How is energy an eigenvalue? Do the math.Kinetic energy= T= 1/2 mv^2 = p^2 / 2m = h^2 / 2m Lambda^2
- Q A 200 g aluminum calorimeter can contain 500 g of water at 20C. A 100 g piece of ice cooled to -20 C is placed in thecalorimeter.Find the final temperature...
- Q While unrealistic, we will examine the forces on a legwhen one falls from a height by approximating the leg as a uniformcylinder of bone with a diameter of 2.3 cm andignoring any shear...
- Q Discuss the relative effectiveness of dieting and exercise inlosing weight, noting that most athletic activities consume foodenergy at a rate of 300 to 400 Cal/h, while a single cup of...
- Q 6. A long, straight wire has a 10.0-
- Q 1)A 75 kg cyclist races around a circular track at a constantspeed of 20 m/s. The radius of the track is 50 m. Express both ofyour answers to the nearest...
- Q To receive full credit for any answer, you must explain youranswers and include a logical and correct application of physicsprinciples and/or definitions in your explanation.If there is a mathmatecal solution...
- Q Suppose the straight-line distance between New York and SanFrancisco is 4.1 × 106 m (neglecting the curvature of the earth). AUFO is flying between these two cities at a speed...
- Q Suppose that the Earthwas thermally insulated from the rest of the universe so that itwas an isolated system. Describe the entropy of the Earth as afunction of time.Consider taking twoidentical...
- Q Ip= 19A at Vp = 440V and Vs= 9000V. If the transformer is 95%efficient, how many turns are in the secondary coil? (efficiency eis the ratio of the power output...
- Q . On a horizontal, frictionless surface, a 9.00 kg objectinitially moving east at 4.00 m/s collides with a 3.00 kg objectthat was initially moving north at 10.0 m/s. After the...
- Q a) Radon undergoes alpha decay with a half-life of 3.8 days.What is its decay constant in s-1?b) Sr -90 (A=90, Z = 38) decays via β- decay.Calculate the energy of...
- Q The 1.2 liter coffee pot is filled with 15 ° C water.What is the amount of heat used to heat and boil water when 50 cm3of water is known to...
- Q In the arrangement above, charge A is -46 nC, while charges Band C are each 67 nC.Each side of the triangle is 7.7 cms.Determine the magnitude of the electric field...
- Q briefly describe and explain the electronic polarization ofnon-metal materials or media upon light transmission, and elaborateits relationship with the electrical and magnetic properties inmaterials. Use schematics or equations if necessary
- Q In a police rifle test, a 15-g bullet traveling 213 m/s in avertical direction suddenly buries itself in a 2.4-kg block of woodat rest directly above it. As a result,...
- Q Planets X, Y, and Z have circular orbits around a Star, which issimilar to our own Sun. Given the data listed below, answer thefollowing questions.Note: \"Days\" are treated as \"Earth...
- Q A uniform, solid sphere of radius 5.00 cmand mass 1.75 kgstartswith a purely translational speed of 3.25 m/sat the top of aninclined plane. The surface of the incline is 1.75...
- Q A proton travels through uniform magnetic and electric fields.The magnetic field is in the negative x direction and hasa magnitude of 3.50 mT. At one instant the velocity of the...
- Q Table 2: Voltage Readings of Different AA BatteryCombinationsBattery CombinationVoltage (V)Current (A)11.581.41 and 23.163.371, 2 and 34.744.501, 2, 3 and 46.506.17Table 3: Resistor DataResistance (Ω)Slope (V/A)Percent Difference10Plot a graph of Table...
- Q A 2kg block slides down a surface inclined at 30 degrees. Intraveling 50cm its speed changes from 1 to 2 m/s. Find the workdone by gravity and coefficient of kinetic...
- Q purpose of the condenser in a refrigeration system? a)rejects heat from refrigerant b)absorbs heat into the refrigerantc) rejects heat from the condensing medium d) increases pressureandtemp of the refrigerant
- Q A block of mass 23 kg is set on top of a 37 degree incline witha hight of 13.5 m. The incline rests on a table that is 27.8 mabove...
- Q 4. Suppose a newborn panda bear of mass 98.0 kg is exhibitinguniform circular motion whileorbiting a neutron star of mass 1.50*10^21 kg and radius3.50*10^5 m. The distance that thebear maintains...
- Q An object with mass 0.150 kg is acted on by an elastic restoringforce with force constant 11.0 N/m . The object is set intooscillation with an initial potential energy of...
- Q A 80.0 kg ice hockey goalie, originally at rest, catches a 0.150kg hockey puck slapped at him at a velocity of 18.0 m/s. Supposethe goalie and the ice puck have...
- Q A 82.0 kg worker climbs a cell tower which is 72.0 m tall. Theworker brings 208 kg of tools and equipment to the top off thetower. The tower can be...
- Q In an experiment electrons are released with a kinetic energy of2.8 eV. The amazing physicists doing the experiments are increasingthe wavelength by 50%. Do you remember what happens? Are thephotoelectrons...
- Q Afreight train consists of two 8.00 x 105 kg engines and 45 carswith average masses of 5.50 x 105 kg. (a) Assuming the force offriction is 7.50 x 105 N,...
- Q Fish are hung on a spring scale to determine their mass (mostfishermen feel no obligation to report the mass truthfully).(a) What is the force constant (in N/m) of the spring...
- Q How much heat is required to change a 47.2 g ice cubefrom ice at -11.9°C to steam at 112°C? (if necessary, usecice=2090 J/kg°C and csteam= 2010 J/kg°C)
- Q A 0.415-kg hockey puck, moving east with a speed of 4.75 m/s,has a head-on collision with a 0.830-kg puck initially at rest.Part AAssuming a perfectly elastic collision, what will be...
- Q Go through the first 20 elements in the chart. Note and recordwhich orbital contains the additional electron. (The variousorbitals are given in the upper right area of the Table.) Thefilling...
- Q If you are told an image is virtual and you know it was made bya single optic (either a lens or a mirror), which of the followingmust be true? Choose...
- Q Ron Swanson is by his fireplace drinking his favorite Lagavulinscotch (the 16 year, of course). He pours 2 ounces (60 ml) ofscotch taken from ambient temperature (20°C) and adds 2...
- Q In the rainy season, the Amazon flows fast and runs deep. In onelocation, the river is 25 m deep and moves at a speed of 4.5m/stoward the east. The earth's...
- Q Suppose a particular simple pendulum of length l_0 has a periodof T_0 for small oscillations here on Earth.(a) Suppose the original pendulum is set up with the same lengthl_0 on...
- Q What occurs to a massive stellar core when it begins fusing ironinto heavier elements. Make sure to discuss energy released orabsorbed by the reactions.
- Q The largest tendon in the body, the Achilles tendon, connectsthe calf muscle to the heel bone of the foot. This tendon istypically 17.0 cm lont 6.00 mm in diameter, and...
- Q What occurs to a massive stellar core when it begins fusing ironinto heavier elements. Make sure to discuss energy released orabsorbed by the reactions.
- Q An 85.4-kg climber is scaling the vertical wall of a mountain.His safety rope is made of nylon that, when stretched, behaves likea spring with a spring constant of 1.19 103...
- Q A 100-W incandescent light bulb has a cylindrical tungstenfilament 26.0 cm long, 0.35 mm in diameter, and with an emissivityof 0.28.(A) What is the temperature of the filament?(B) For what...
- Q A 2690-kg spacecraft is in a circular orbit 2320 km above thesurface of Mars.How much work must the spacecraft engines perform to move thespacecraft to a circular orbit that is...
- Q Explain Magnetic Resonance Imaging.What is the fundamentalphysics concepts behind Magnetic Resonance Imaging? How does itwork?
- Q Imagine SETI astronomers discover a world with intelligentlife.  Should we make contact? Please write a 2 paragraph response withthe following structure:Paragraph 1: Two reasons why we SHOULD make contact. Two reasonswhy...
- Q 1. Find the electric field magnitude midway through thenonconducting wall of a thick-walled pipe of infinite length withinner radius w, outer radius 3w, and a uniform volumetric chargedensity Ï. Answer...
- Q Let’s say you push the block from the bottom of the plane allthe way up to the top of the plane, then let it slide backdown.11-1. While you are pushing...
- Q Discuss the physical significance of the equivalentmagnetization current densities J_m and J_ms.Can we utilize them as current sources to run a circuit? IfYES/NO, why do you think so?
- Q While exploring a castle, Exena the Exterminator is spotted by adragon who chases her down a hallway. Exena runs into a room andattempts to swing the heavy door shut before...
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