Physics question and answers for July 17, 2023
- Q Hello, please if you were to learn and teach these topicsCounted systems and integersFractions, decimals and percentagesPowers and laws of indicesCounting using the product rulewhat kind of difficulties you might...
- Q The Moon orbits Earth in an average of p = 27.3 days at anaverage distance of a =384,000 kilometers. Using Newton’s versionof Kepler’s third law determine the mass of Earth....
- Q 1. At high noon, a sinusoidal electromagnetic wave is headingstraight toward San Diego. At a 12:00 sharp, the electricfield at a certain location is 700 N/C directed South. a) What...
- Q Normal seeds can be separated from discoloured ones and fromforeign objects by means of an electrostatic seed-sorting machinethat operates as follows. The seeds are observed by a pair ofphotocells as...
- Q A sphere of radius R has a radius dependent charge density Ï = B· r3 in terms of R and B.Calculate the potential as a function of r from the...
- Q Topic:Physics statisticsGive definition of chemical potential. Calculate the canonicalpartition function and chemical potential of a classic N-particleideal gas
- Q Patch-Clamp instruments allow researchers to measure the openingand closing of a single channel in a membrane. A typicalacetylcholine receptor channel passes about 5 pA (picoamperers) ofionic current over a period...
- Q A stone with a mass of 525 g in air is found to have an apparentmass of 377 g when submerged in water. a. What mass of liquid isdisplaced? b....
- Q Question 1a) Continuing concerns about the ‘sustainability’ of both fossiland nuclear fuel usehave been a major catalyst of renewed interest in the renewableenergy sourcesin recent decades. One of the criteria...
- Q A household’s daily energy usage is 800 Wh. The operatingvoltage is set at 24 V. Day of autonomy required is 4 days and themanufacturer only allows the battery to have...
- Q Due to a recession, expected inflation this year is only 2.75%.However, the inflation rate in Year 2 and thereafter is expected tobe constant at some level above 2.75%. Assume that...
- Q A basketball is dropped from 140 meters height with back spin.It goes straight down and then it gains speed as it curves 70meters horizontally away from where it is dropped....
- Q <Basic Physics (Conceptual)>1. Look up the distance to the nearby star Alpha Centauri. Andlook up the distance to the center of the Milky Way. Convert (orget) both of those distances...
- Q 1) A car is clocked at 25 m/s in a 50-mi/h zone. Is itspeeding?2) Use the definition of the meter to determine how far lighttravels in exactly 1 ns. Express...
- Q Suppose a radioactive nucleus has a half-life of 2 min. andsuppose the counting rate at time t = 0 is 3000 counts/10 sec. a.What is the counting rate after 2...
- Q i)Why is a converging field necessary in a magnetic separator?ii) Briefly describe the working principle of a low-intensitymagnetic separator. iii) Explain the working principle of aninduced roll magnetic separator.Why is...
- Q The activity of a sample of a radioisotope at some time is 10.1mCi and 0.36 h later it is 6.60 mCi. Determine the following:(a)Decay constant (in s−1)(b) Half-life (in h)(c)...
- Q We aim a red (620 nm) laser onto asmall screen that has two slits that are 0.1 mm apart. Each slithas a width of 0.03 mm.The light coming out of...
- Q Which ONE of the following statementsregarding Projectile Motion isFALSE?An increase in projection velocity using a Golf Club willincrease the distance traveled of the projectile.Increasing the projection angle from 45o to75o...
- Q 1)A block of mass m1 = 8.00 kg and a block of mass m2 = 12.0 kgare connected by a massless string over a pulley in the shape of asolid...
- Q In radio communications, multiple-input, multiple-output (MIMO)is a method for multiplying the capacity of a radio link usingmultiple transmissions and receiving antennas to exploit multipathpropagation. Explain with a proper diagram how...
- Q Explain the following i)Refraction ii) Wave mode iii)Blochbody
- Q A firefighter carries a hose up a ladder to a height of 10.0 m,so that she can spray water onto a burning roof that is 9.00 mhigh. She holds the...
- Q twopoint charges 1 uC and 2 uC are located at the origin and a point(0.19m, 0) respectively. Find the electric field due to the chargesat a point (0.33 m, 0)What...
- Q A cannon is rolling to the right at a speed of0.50 c. In its own frame, it fires a8.5 kg cannonball to the right at a speed of0.72 c . Let Abe...
- Q NO PICTURE ANSWERS:Explain the model for Jovian planet formation.
- Q How do you calculate the radioactive isotope inventory of allpresent elements when a sample 1g of 5% U-235 and 95% U-238 is leftto decay for a year?
- Q k1= k2m1=9m^2P1=P2What is the relationship between P1 and P2?The momentum will be the same?Krepresents kinetic energy
- Q Q. what is the difference between Black-litterman and Stutzer’s2004 optimisation approach ?
- Q 1. Do I understand AC-circuit enough to be able toobtain v(t) and i(t) in a given AC-circuit with variouscombinations of R, L and C?  1a. Can I tell or plot...
- Q A helicopter flying over a hard-to-reach area had an accident.The team of recatists know that the area where the plane fell hasthe form given by f(x,y) = xsiny, the last...
- Q Question 3The electronic structure of atoms and molecules may beinvestigated using photoelectron spectroscopy. An electron in aphotoelectron spectrometer is accelerated from rest by a uniformelectric ï¬eld to a speed of...
- Q A metal sphere of radius a has a uniform (free) chargedensity σf on its surface. The permittivity of thedielectric region surrounding the sphere varies as , wherer is the radial...
- Q The speed of waves on a string is 97 m/s. If the frequency ofstanding waves is 485Hz, how far apart are the two adjacentnodes?Two sig figs and proper units
- Q Four equally charged particles with charge q are placed at thecorners of a square with side length L, as shown in the figurebelow. A fifth charged particle with charge Q...
- Q Part B: Ballistic PendulumThe questions n the very bottom ispertaining to a lab over projectile motion and its asking to useequations on the bottom to find velocity. Below are the...
- Q Bypressing the start button, 5 motors will be activated in order.Each of the engines will run for 54 seconds, and when an enginestops, the next engine will start. The working...
- Q 1. Why is the steady state concentration gradient linearin equimolecular counter diffusion?2. Explain why the dissolution of a crystalline particlein a solution can be speeded up by (a) stirring the...
- Q Ahot-air balloon is initially floating (stationary) a few metresabove the ground. The radius of the spherical balloon is 6.25 m,and the density of surrounding air is 1.29 kg m-3. \"Ballast\"...
- Q 1) In 2014 the Rosetta spacecraft, orbiting the comet67P/Churyumov-Gerasimenko, measured the rotation period of thecomet's nucleus at 12.404 h. By the time the Rosetta mission endedin 2016, the period had...
- Q An object moves with constant acceleration 4.10 m/s2and over a time interval reaches a final velocity of 13.8 m/s.(a) If its original velocity is 6.90 m/s, what is itsdisplacement during...
- Q The weight of your 1430 kg car is supported equally by its fourtires, each inflated to a gauge pressure of 33.0 lb/in2Part A: What is the area of contact each...
- Q Two grapes are given equal charges and held apart at a distanceof 1.5 m. They experience a repulsive force of 2.2 N. Find themagnitude of the charge on each grape.
- Q what are the quantum phenomena to improve the speed ofFET transistors
- Q 11. (a) Illustrate the \" standing wave \" measurement fordetermining the speed of light . (b) How would we determine thespeed of light with this method?
- Q Tarzan jumps from a cliff and grabs a vine. He jumpshorizontally from the cliff with initial velocity v0 atthe time t0. The vine has mass M and length L.Initially, the...
- Q There are two speakers at the front of the room. Each isoutputting a 250Hz pure tone. For each of the following situations,will you hear constructive interference (a loud noise) ordestructive...
- Q The forces exerted by the limbs of our body on external objectsin the environment are often much smaller than the force exerted bythe muscle on the limbs. Use a suitable...
- Q 4. An object 3.0cm tall is placed 20cm from the front of aconcave mirror with a radius of curvature of 30cm.(a) Where is the image formed? (b) How tall is...
- Q 2. (a)A convex spherical surface of radius +50 mm separates air fromglass of refractive index 1.6. A parallel pencil of rays in air isincident on this surface. Find where the...
- Q Thetwo basic systems can be used for the injection into dieselengine?
- Q a) In a photoelectric cell, the minimum voltage required toreduce the current to zero is 3.0 V. What is the maximum kineticenergy of the electrons ejected from this cell? (format...
- Q A mass m = 17 kg is pulled along a horizontal floor, with acoefficient of kinetic friction μk = 0.06, for adistance d = 5.1 m. Then the mass is...
- Q Can aliasing be prevented? If so, give one example of how.
- Q The moment arm of the biceps is approximately 2 cm from the axisof rotation of the elbow and the force vector representing thebiceps is approximately 115 degrees from the positive...
- Q Post a cohesive response that addresses the following:As more companies outsource systems development, will there beless need for in-house systems analysts? Why or why not?
- Q what are the physical phenomena that determine thespeed of the FET transistors
- Q A Vogue writer is doing a study for her latest article to betitled “Brain or Brawnâ€.  The writer found 10 volunteersof the same age and above average looks to observe how...
- Q A home run is hit in such a way that the baseball just clears awall 14 m high, located 120 m from home plate. The ball is hit atan angle...
- Q A toy car of mass 40g rides along a frictionless track of length5m. One end of the track is held 2m above the floor. The end on thefloor meets a...
- Q Choose the correct statements from the following list. (GiveALL correct answers, i.e., B, AC, BCD...)A)B) The horizon problem in cosmology is that regions of the universethat should not have ever...
- Q Suppose a 2-dimensional space is spanned by the coordinates (v,x) and that the lineelement is defined by:ds2 = -xdv2 + 2dvdxi) Assuming that the nature and properties of the spacetime...
- Q A potter's wheel is rotating around a vertical axis through itscenter at a frequency of 1.6 rev/s . The wheel can be considered auniform disk of mass 6.0 kg and...
- Q 1.Explain the mathematical and graphical relationship betweenvelocity and acceleration using your own words.2.Explain the mathematical and graphical relationshipbetween velocity and position using your own words.3.How does the angle of inclination...
- Q Explain how to use color coordinates to find the range of colorsthat can be expressed using three different colored (waveform)light sources and discuss what values should be chosen on the...
- Q In a closed, isolated system of particles, forces internal tothe system do not change the motion of the system as a whole. Thevelocity of the center of mass of such...
- Q On a drive of 800 miles how much CO2 do you releasein to the atmosphere in kilograms. Assume your car consumes 24miles to the gallon.(Your gas is 100% octane, and...
- Q A Spherical Capacitor with two concentric shells with radii aand b with a<b. The volume between the shells contains a vacuumand the inner and outer shells hold charges +Q and...
- Q 20, This picture is an example of____________Elastic CollisionInelastic collision21,This picture is an example of ____________Elastic CollisionInelastic collision22,The law of conservation of momentum states that thetotal momentum of all objects interacting...
- Q A physicist has developed a device that generates a beam ofalpha particles (each of which is a helium nucleus, consisting oftwo protons, two neutrons, and no electrons). The device ejects...
- Q A box (massm= 15kg) is placed on a slope (θ= 35◦), as shown inthe diagram below. Thecoefficients of friction between the box andthe slope areμs= 0.6 andμk= 0.4. The box...
- Q A 115 N block moves on a flat surface at an initial speed of 5m/s. The coefficient of kinetic friction between the block and thesurface is 0.28. The block is...
- Q The position of a 55 g oscillating mass is given byx(t)=(2.3cm)cos13t, where t is in seconds.Determine the amplitude.Determine the period.Determine the spring constant.Determine the maximum speed.Determine the total energy.Determine the...
- Q There is a long cylinder magnet with inner radius ofR1 outher radius of R2 length of L and magnetization of M=MoZ forR1<rR2Calculate B and H everywhereClaculate bound surfaceCalculate the magnetic...
- Q A thin, uniform bar of length L and mass M is suspendedhorizontally at rest. It is suddenly releasedand, at the same instant, it is struck a sharp blow verticallyupwards at...
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