Physics question and answers for October 09, 2023
- Q Imagine that you have obtained spectra for several galaxies andhave measured the observed wavelength of a hydrogen emission linethat has a rest wavelength of 656.3 nanometers. Here are yourresults:Galaxy 1:...
- Q 2. On average, both arms and hands together account for 13% of aperson's mass, while the head is 7.0%and the trunk and legs accountfor 80%. We can model a spinning...
- Q A 0.50-?F and a 1.4-?F capacitor (C1and C2, respectively) are connected in series to a 15-Vbattery.Part A. Calculate the potential difference across eachcapacitor. Express your answers using two significant figuresseparated...
- Q I found the value for A which proved to be very simple, howeverthe ones involving density are giving me headaches.Thanks in advance....Find the gravitational force that the earth exerts on...
- Q What is the smallest number of whole logs (density = 695 kg/m³,radius = 0.073 m, length = 2.73 m) that can be used to build a raftthat will carry 6...
- Q List the types of noise and their sources. What are the variousways of enhancing Signal-toNoise ratio?
- Q The development of the internal-combustion engine causedfundamental changes in urban land-use patterns. The transformationfrom the core-dominated city to the modern suburbanized city tookonly about 50 years. Given the rapid pace...
- Q Please answer part AThree spaceships all broadcast a signal at the same frequencyf0. Spaceship #1 is at rest, spaceship #2 istraveling away from #1 at a speed v, and spaceship...
- Q In a thermally isolated environment, you add ice at 0°C andsteam at 100°C. (a) Determine the amount of steam condensed (in g)AND the final temperature (in °C) when the mass...
- Q Two isolated, concentric, conducting spherical shells have radiiR1 = 0.450 m and R2 = 1.50m, uniform charges q1 = +1.70 μC andq2 = +2.30 μC, and negligible thicknesses. Whatis the...
- Q Sand from a stationary hopper falls on a moving conveyor belt atthe rate of 4.60 kg/s as in fig. P9.72. The conveyor belt issupported be frictionless rollers and moves at...
- Q Whena golf ball or basketball is dropped to the pavement, it bouncesbackup. (i) Is a force needed to make it bounce back up? (ii) ifso, what exerts the force?(b) Whiplashsometimes...
- Q QUESTION 4a) Define speed, velocity and acceleration statingwhether they are scalar or vector quantities. Support withcalculative examples ( 9 marks)b ) Draw a graph of an object that starts from...
- Q 1) A wheel with a weight of 396 N comes off a moving truck androlls without slipping along a highway. At the bottom of a hill itis rotating at an...
- Q A number 14 copper wire has a diameter of 1.628 mm. Calculatethe resistance of a 34.0 m long piece of such wire.(Use 1.72×10-8 Ωm for the resistivity of copper.)2.809×10-1 OhmFor...
- Q A quarterback throws a pass that is a perfect spiral. In otherwords, the football does not wobble, but spins smoothly about anaxis passing through each end of the ball. Suppose...
- Q Does a flat mirror produce a real or virtual image? What is itsmagnification?
- Q Many people think that quantum physics is used only in thelaboratory. In fact, many devices that depend on quantum physicsfor their operation are used in business, industry, and oureveryday lives....
- Q Q2) A 400-gram package lying on a horizontal surface is attachedto a horizontal string which passes over a smooth pulley. When amass of 200 grams is attached to the other...
- Q QUESTION 1:Two point masses are the same distance R from an axisof rotation and have moments of inertia IA andIB.(a)If IB = 4IA, what is theratiomBmAof the two masses?mBmA=(b)In terms...
- Q 5. A proton and an electron are in a uniform electric field withmagnitude 45 V/C. Which particle has the larger magnitudeacceleration, and what is the magnitude of the acceleration? (e...
- Q 1. Several forces act on an object at rest. It is known that thesum of the forces acting on the object is zero. Which statement isnecessarily true?A) The object will...
- Q A) Three equal charges 6.3 ?C arelocated in the xy-plane, one at (0 m, 51 m), another at(56m,0m),and the third at(57m,?66m).Find the magnitude of the electric field at the origin...
- Q An object that weighs 1180 N rests on a lever at a point 0.370 mfrom a support. On the same side of the support, at a distance of3.00 m from...
- Q In your own words and not copied from the web please.Optical fibers aremade from glass or plastic and generally have an index ofrefraction of about 1.45. They are commonly used...
- Q 1. Distinguish between inertial and accelerated frames ofreference.2.Consider two days when the air temperature is the same but thehumidity is different. Which is more dense, the dry air or thehumid...
- Q A mass m = 17 kg is pulled along a horizontal floor with NOfriction for a distance d =5.7 m. Then the mass is pulled up anincline that makes an...
- Q An object with total mass mtotal = 14.6 kg is sittingat rest when it explodes into three pieces. One piece with massm1 = 4.7 kg moves up and to the...
- Q 1. A 25 kg box is lifted upward at a constant rate of 2 m/s. Ifthe box is lifted a height of 4 m, how much work is done on...
- Q 1. Derive PV^Gamma = constant2. All adiabatic relations
- Q A symmetrical table of height 0.750 m, length 1.55 m, and weight462 N is dragged across the floor by a force applied to its frontedge. The force is directed to...
- Q The formula for length contraction gives the length of aninterval on a ruler moving with velocity v relative to an observeras where L is the length of the same interval...
- Q A solid, uniform disk of radius 0.250 m and mass 60.6 kg rollsdown a ramp of length 4.80 m that makes an angle of 12.0° with thehorizontal. The disk starts...
- Q Ilya and Anya each can run at a speed of 8.30mph and walk at aspeed of 3.90mph . They set off together on a route of length5.00miles . Anya walks...
- Q A 2.90-kg box is sliding along a frictionless horizontal surfacewith a speed of 1.8 m/s when it encounters a spring.(a) Determine the force constant of the spring, if the boxcompresses...
- Q Normal forces are applied uniformly over the surface of aspherical volume of water whose radius is 20.0 cm. If the pressureon the surface is increased by 200 MPa, by how...
- Q A 4.00 kg ball traveling North with a momentum of 11.2 kg.m/scollides with a 6.0 kg ball traveling West with a momentum of 18kg.m/s. The two balls stick together and...
- Q You are advised not to open the radiator cap of the radiator ofyour car(pressure cap) when it is very hot. The reason is that thepressure inside radiator is more than...
- Q s] From a distance of ra = 8.000 m, a trumpet player plays an Anote, f1 = 440.0 Hz, with a sound intensity level of β1 = 58.00 dB.A tuba...
- Q A scientist looking for meteorites on Antarcticafinds an irregularly shaped rock andhe wants to determine its density. He determines that the rock’smass in air is 50kg.The Young’s modulus of steel...
- Q A laser emits a cylindrical beam of light 4.0 mm in diameter.The average power of the laser is 2.8 mW . The laser shines itslight on a perfectly absorbing surface.How...
- Q The most common isotope of boron is 115B.part b) Calculate this binding energy from equationEB=C1A−C2A2/3−C3Z(Z−1)/A1/3−C4(A−2Z)2/A±C5A−4/3. Express youranswer using four significant figures. (in MeV)part c) Why is the fifth term zero?
- Q State the Three Laws of Thermodynamics (2nd Law has multipleparts).
- Q Two beams of electrons, beam 1 and beam 2, are moving alongstraight lines perpendicular to the page. We take the page to bethe xy-plane. Beam 1 is moving into the...
- Q A wire carries an I1 = 7.85-A current alongthe x-axis, and another wire carries anI2 = 5.85-A current along the y-axis,as shown in the figure below. What is the magnetic...
- Q #4. A vase was placed on the coffee table. Thecoefficient of static friction between the vase and the table is0.3689, whereas the coefficient of kinetic friction is 0.1339. Thevase weighs...
- Q a) If an atom has an electron in the n=3 statewith m=1, what are the possible values of l, theangular momentum quantum number?b)What are the possible values of m for...
- Q A block of mass m1=4.00 kg moves on the surface of a horizontaltable. The coefficient of kinetic friction between the table topand m1 is equal to 0.350. Block 2 of...
- Q what are the classical explanation and quantum explanation forthe existence of the fringe pattern?
- Q A block with mass mA = 15.0 kg on a smooth horizontal surface isconnected by a thin cord that passes over a pulley to a secondblock with mass mB =...
- Q Where there are multiple forces acting on the sameobject, draw a free-body diagram (i.e a diagram where each vectorfor each of the different forces is shown): A book on atable...
- Q Two small forward-facing speakers are 2.50 m apart. They areboth emitting, in phase with each other, a sound of frequency 1100Hz in a room where the speed of sound is...
- Q Question C Aspacecraft for extrasolar travel uses a sail to reflect light backtoward the sun. At earth’s orbit the sunlight has an intensity of1368 W/m2. The spacecraft has a mass...
- Q Apply the Pauli exclusion principle to determine the number ofelectrons that could occupy the quantum states described by thefollowing.a) n = 4, ℓ = 3, mℓ = −2b) n =...
- Q Your 300mL cup of coffee is too hot to drink when served at 90.0∘C.A)What is the mass of an ice cube, taken from a-16.0 ∘C freezer, that will cool your...
- Q The circuit you’re making needs a 1.5?? capacitor but you onlyhave three 1?? capacitors. Draw how you make an equivalentcapacitor from the 1?? capacitors.
- Q 1) why do atoms have discrete spectral lines?2) Is it possible for different atomic transitions, in aparticular atom, to give off the same colour photons?why?3) A beam of red photons...
- Q s
- Q Required information A nozzle of inner radius 1.08 mm isconnected to a hose of inner radius 9.20 mm. The nozzle shoots outwater moving at 25.0 m/s. At what speed is...
- Q Large radio telescopes, like the one in Arecibo, Puerto Rico,can detect extremely weak signals. Suppose one radio telescope issensitive enough to detect a signal which lays down only 1.3 pW...
- Q Ball Collision. A ball with a mass of 0.600 kg is initially atrest. It is struck by a second ball having a mass of 0.400 kg,initially moving with a velocity...
- Q 1.The space shuttle is ina 250-km-highcircular orbit. It needs to reacha 610-km-highcircular orbit to catch the HubbleSpace Telescope for repairs. The shuttle
- Q The charge at a point in space is q (t) = 0.5 cos (6t) C. Whatis the current at t = −2 s? At an arbitrary time t?
- Q 2) The Plank radiation law isI(lambda) = 2 pi h c2/[lambda5 (ehc/labda kT -1)]take the derivative of this expression with respect to lambda toshowlambdamax = hc/(4.965kT).You may uses 5 -...
- Q An 8000 kg truck traveling with a velocity of 20. 0 m/s in adirection 30 ° south of east and a 6250 kg car traveling with avelocity of 25. 0...
- Q A -10.0 nCpoint charge and a +20.0 nCpoint charge are 15.0 cmapart on the x-axis.Part A)What is the electric potential at the point on the x-axiswhere the electric field is...
- Q 1. Determine the variance in position and momentum,Δx2=<x2>−<x>2 andΔp2=<p2>−<p>2 for theground-state SHO and show that they satisfy the Heisenberguncertainty relation, (Δx)(Δp)≥â„2
- Q Two cars are approaching each other, one traveling north with amomentum of 3 kg-m/s and one traveling east with a momentum of 4kg-m/s. The two cars collide and stick together....
- Q (a)A solenoid having an inductance of 6.30μHis connected in series with a 1.6 kΩresistor. If a 14.0Vbattery is connected across the pair, What is the current inunits of Athrough the...
- Q A 10 g bullet traveling at 350 m/s strikes a 9.0 kg , 1.2-m-widedoor at the edge opposite the hinge. The bullet embeds itself inthe door, causing the door to...
- Q Sound with a frequency 710 Hz from a distant source passesthrough a doorway 1.17 m wide in a sound-absorbing wall.(a) Find the number of the diffraction minima at listeningpositions along...
- Q The wạlls of ạn ice chest ạre mạde of 2.00-mm-thick insulạtionhạving ạ thermạl conductivity 0.00300 W/m∙K. The totạl surfạce ạreạof the ice chest is 1.20 m2. The temperạture of theoutside...
- Q A nonconducting ring of radius of 11.6 cm is uniformly chargedwith a total positive charge of 10.0 µC. The ring rotates at aconstant angular speed 18.6 rad/s about an axis...
- Q A charge of 2.20 µC is uniformly distributed on a ring of radius9.0 cm. Find the electric field strength on the axis at thefollowing locations. (be careful calculating c and...
- Q Explain how X-ray observations are used to determine thetemperature, T (r), and den- sity, Ïgas, of the hot gas in anelliptical galaxy. What quantities are observed directly and howare they...
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