Physics question and answers for August 21, 2023
- Q A charge q1=4.10 mCis located at the origin of acoordinate system. Another charge q2=4.80 mC is locatedat x=-1.70 m and y=-4.50 m, and another q3=4.20 mC islocated at x=-2.30 m...
- Q A blood transfusion is being set up in an emergency room for anaccident victim. Blood has a density of1060 kg/m3 and aviscosity of 4.0
- Q What is the velocity and period of a satellite orbiting planetearth?Answer using a Gravitacional approach*
- Q How much total heat transfer is necessary to lower thetemperature of 0.315 kg0.315 kg of steam from 145.5 °C145.5 °C to−15.5 °C,−15.5 °C, including the energy for phase changes?total heat...
- Q The electrons in a cathode ray tube are emitted by a hotfilament cathode and are accelerated by an electric field appliedbetween the cathode and two orthogonal pairs of parallel plateelectrodes....
- Q Pendulum Lab.. List each measurement name, a representativevalue [Units] ± σ with explanation. Your two measurements wereLength and Period.
- Q Two 2.0-cm-diameter insulating spheres have a 5.60 cm spacebetween them. One sphere is charged to + 40.0 nC , the other to -60.0 nC .Part AWhat is the electric field...
- Q A satellite is put into an elliptical orbit around the Earth.When the satellite is at its perigee, its nearest point to theEarth, its height above the ground is hp=215.0 km,hp=215.0...
- Q Consider a particle in an infinite square well, but instead ofhaving the well from 0 to L as we have done in the past, it is nowcentered at 0 and...
- Q I can't really understand why two higgs doublets are required inSUSY.From the literature, I have found opaque explanations that saysomething along the lines of: the superpotential W must be aholomorphic...
- Q A lightning bolt strikes one end of a steel lightning rod,producing a 15300-A current burst that lasts for 67 μs .The rod is 2.5 m long and 2.3 cm in...
- Q A 8.0-cm-diameter horizontal pipe gradually narrows to 5.0 cm .When water flows through this pipe at a certain rate, the gaugepressure in these two sections is 31.0 kPa and 25.0...
- Q Askier of mass 75kg starts from rest at the top of a friction lessincline that is 20.0 m in height. As soon as she touches the bottomof the incline, she...
- Q A 450-turn solenoid, 24 cm long, has a diameter of 2.2 cm . A10-turn coil is wound tightly around the center of the solenoid. Ifthe current in the solenoid increases...
- Q A sled and rider have a total mass of 49.6 kg. They are on asnowy hill accelerating at 0.8g. The coefficient ofkinetic friction between the sled and the snow is...
- Q 10-Two events occur at the same place in a frame S and areseparated by a time interval of 1s. The same events are separatedby a time interval of 4 s...
- Q A skier starts from rest at the top of a hill that is inclinedat 10.8° with respect to the horizontal. The hillside is 245 mlong, and the coefficient of friction...
- Q Two objects, O1 and O2, have charges +3.0μC and −5.0μC,respectively, and a third object, O3, is electrically neutral.Part A:What is the electric flux through the surface A1 thatencloses all three...
- Q True or False, please answer only if you are sure:A) The work done by a constant force acting on an object isindependent of the orientation of the force relative to...
- Q Calculate the electric field(magnitude and direction) at thecenter of a square 52.5 cm on a side if one corner is occupied by a- 38.8 μC charge and the other three...
- Q \"The CMB represents the heat left over from the BigBang. It is the oldest electromagnetic radiation in theuniverse.\"Why \"heat\"? Isn't very cold?What is the connection between the blackbody and the...
- Q The loaded cab of an elevator has a mass of 3.6 × 103kg and moves 216 m up the shaft in 17 s at constant speed. At whataverage rate does...
- Q A plane with a speed of 800.0 km/hr due east passes directlyabove a train traveling due southeast at 100.0 km/hr on a straightlevel road. The altitude of the aircraft is...
- Q A test charge of +3.00 μC is placed halfway between a charge of+8.00 μC and another of +5.00 μC separated by 10.00 cm. (a) What isthe magnitude of the force...
- Q A 10 cm long thin glass rod uniformly charged to +10 nC and a 10cm long thin plastic rod uniformly charged to -10nC are placed sideby side 4 cm apart.a....
- Q What range ofvelocities might an electron have if it is confined to a0.4-nm-wide region? And if it is confined to about the size of anatom (0.1-nm-wide region)? Compare this to...
- Q Blue light of wavelength 470 nm passes through an interferencegrating with a slit spacing of0.001 mm and makes an interferencepattern on the wall.How many bright fringes will be seen?
- Q Q.6 (same as problem 3) The phenomenon that distinguishestransverse waves from longitudinal waves isA. FrequencyB. AmplitudeC. PolarizationD. Speed
- Q What is the escape speed on a spherical asteroid whose radius is700 km and whose gravitational acceleration at the surface is 0.685m/s2? (b) How far from the surface will a...
- Q A meteor with a mass of 1 kg moving at 20 km/s collides withJupiter's atmosphere. The meteor penetrates 100 km into theatmosphere and disintegrates. What is the average force on...
- Q 1. How can contrast be achieved in a display using texture?Color? Line? Give an example of each2. Describe the concept of proportion, and explain why it isimportant to any visual...
- Q A solid cylinder with a mass of 3 kg, a radius of 25 cm, and alength of 40 cm is rolling across a horizontal floor with a linearspeed of 12...
- Q Problem 9.41A firecracker in a coconut blows the coconut into three pieces.Two pieces of equal mass fly off south and west, perpendicular toeach other, at 20 m/s . The third...
- Q Two very long solenoids have the same number of turns per unitlength, and carry the same current, but the radius of thecross-section of solenoid #1 is twice that of solenoid...
- Q A point of charge q is placed at the point (-d,0) and a secondpoint charge of charge 2q is placedat point (2d,0). a) What is the force on the third...
- Q Two objects with masses m1 = 37 kg and m2 = 39 kg are movingtoward each other with speeds V1 = 14 m/s and V2 = 18 m/s. Theycollide and...
- Q Kinetic energy is conserved in an elastic collision bydefinition. Show, using the Galilean transformation equations, thatif a collision is elastic in one inertial frame it should beelastic in all inertial...
- Q Arrange four quarter coins touching each other as a 2-D squarelattice. Calculate the area of the air-space (dead-space). (Ignorethe thickness of the quarters.) Repeat the problem for a triangularlattice.
- Q A parallel-plate capacitor has 2.18 cm2 plates that areseparated by 5.69 mm with air between them. If a 18.0 V battery isconnected to this capacitor, how much energy does it...
- Q Consider two oppositely charged, isolated parallel platesseparated by distance D, with capacitance C,charge Q, and stored energy U. D is smallcompared to the dimensions of the plates. For each statement...
- Q Could a star ever move in retrograde motion? Would you everexpect a star to significantly change its position in the skyrelative to other stars and constellations? Why does a planet...
- Q A batter hits a pitched ball when the center of the ball is 1.28m above the ground.The ball leaves the bat at an angle of 45° withthe ground. With that...
- Q Billiard ball A of mass mA = 0.122 kg moving with speed vA =2.80 m/s strikes ball B, initially at rest, of mass mB = 0.145 kg .As a result...
- Q A wooden ring whose mean diameter is 14.5 cm is wound with aclosely spaced toroidal winding of 615 turns.Compute the magnitude of the magnetic field at the center of thecross...
- Q What maximum output would you expect from a wind turbine with ablade of radius 15 ft in a 25 mph wind
- Q When consulting manuals, electricians, online sources, etc.,they always instruct you to handle halogen light bulbs withgloves.The \"explanation\" that usually accompanies this statement isthat oils and salts from a bare hand...
- Q A conducting sphere is placed within a conducting sphericalshell as shown in the figure below. The conductors are inelectrostatic equilibrium. The inner sphere has a radius of 1.50cm, the inner...
- Q 8. What was the mechanism behind the nuclear test detectionapparatus during the 1940s?A. Seismic waves travel from the test site through the Earthto detectors.B. The loud explosion sends noise through...
- Q 1. Although quantum information has been around for a long time,we are starting to see more about it in the media
- Q A liquid has a density at 289K of955kg/m^3. Its(volume) thermal expansion coefficient is 1.05E-3/K.What is its density at 316K? Answer 929 kg/m^3 I'd appreciateexplanation ! Thank you :)
- Q Ablue spot is located on a rope. As a pulse passes by, what is thespot’s average speed during it’s traverse motion from equilibriumto the peak and back. Height of pulse...
- Q Our sun will first become a red giant star when it leaves theMain Sequence, as it goes from core Hydrogen burning to shellHydrogen burning. After it has exhausted all of...
- Q A parallel-plate air-filled capacitor has a capacitance of 335pF. If each of its plates has an area of 0.025m2, what is the separation? If the regionbetween the plates is now...
- Q How does specific heat affect the weather? Give three examplesof weather phenomena that are affected by the specific heat ofland, oceans and air
- Q The motor that drives a refrigerator produces 148 W of useful power. The hot and cold temperatures of the heat reservoirs are 20.0°C and −5.0°C. What is the maximum possible...
- Q 1. By using the formula for the Electric Field, calculateElectric field of a solidnonconducting sphere withradius R, and charge Q distributed uniformly on the sphere, at anypoint a distance r...
- Q The resting surface charge density of a membrane is 0.5 uC/cm^2.The resting membrane potential is 0.5 V. It drops to 0 V in 5 ms.If there are 25 Na channels...
- Q Derive the formula for electron charge to massratioe/m=2V/(Br)^2: first, explain why formulas(mv^2)/r=evB andeV=1/2mv^2 must hold. Then, do what algebra is necessaryto show that those formulas imply formulae/m=2V/(Br)^2
- Q An RLC series circuit has a 60 Ω resistor, a 3.5 mH inductor,and a 6 μF capacitor.Find the circuit’s impedance at 55 Hz and 12 kHz.If the voltage source has...
- Q 37. Give two examples of different fossil fuels currently usedtoday?38.Explain how voice is changed into a fluctuating voltage inthe early telephones?39. What 1799 discovery allowed us to translate the ancientEgyptian...
- Q Two point charges are fixed on the y axis: a negative pointcharge q1 = -30 μC at y1 = +0.22 m and a positive point charge q2at y2 = +0.37...
- Q A diffraction grating has 25,000 lines/cm and is illuminatedwith light having a frequency of 5.0 x 10​14​ Hz. What are theangles of (a) the first-order bright fringe and (b) thesecond-order...
- Q An engineering students designs and builds a capacitor from somescrap iron. One piece of iron is a square with side lengths of 10cm, while the other piece is a rectangle...
- Q A disk-shaped merry-go-round of radius 2.63 m and mass 155 kgrotates freely with an angular speed of 0.570 rev/s. A 59.4-kgperson running tangential to the rim of the merry-go-round at...
- Q A space station consists of three modules, connected to form anequilateral triangle of side length 82.0 m. Suppose 100 people,with an average mass of 75.0 kg each, live in each...
- Q Discuss stress and strain of materials in terms of Hooke's law.Please be detailed.
- Q A man drops a rock into a well.(a) The man hears the sound of the splash 2.20s after he releases the rock from rest. The speed of soundin air (at...
- Q A certain red giant star has a luminosity of 100,000 times thatof the Sun and is located 600 light-years from Earth. If theapparent magnitude of the star is observed to...
- Q Answer the following questions involving specific heatcapacities :a ) How much energy is required to change 42 g ice cube from iceat -11°C to steam at 111°C?b ) Liquid nitrogen,...
- Q explain how to prepare sample solutions and capillaryapplicators
- Q Consider the following AC circuit. Let R = 1.0kΩ, C = 150µF andL = 10.0 mH. The AC voltage source is of frequency 60 HZ and has amaximum voltage Vmax...
- Q a. For point charge 5.4 µC and point charge -3.6 µC located atthe same positions as in the previous question (5 m and 4 m,respectively), determine the magnitude of the...
- Q Givens (Questions 1
- Q An archeological specimen containing 9.42 g of carbon has anactivity of 1.58 Bq. How old (in years) is the specimen? Do notenter unit.
- Q An infinitely long, solid non-conducting rod (cylinder) withcircular cross section of radius a has its axis along the z-axis.It has a non-uniform volume charge density given in cylindricalcoordinates by Ï(s)...
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