Category Archives:
Essay Writing Help

magnetic field A particle with a mass of 6.64×10^–27 kg and a charge of+3.20×10^–19 C is accelerated from rest through a potentialdifference of 2.45×10^6 V. The particle then enters a uniform1.60-T magnetic field. If the particle’s velocity isperpendicular to the magnetic field at all times, what is themagnitude of the magnetic force exerted on the […]

motion of a charged particle in an E field One type of ink-jet printer, called an electrostatic ink-jet printer, forms the letters by using deflecting electrodes to steer charged ink drops up and down vertically as the ink jet sweeps horizontally across the page. The ink jet forms 28.0 μm −diameter drops of ink, charges […]

electromagnetism A charge of -6.50 nC is spread uniformly over the surface of one face of a nonconducting disk of radius 1.25 cm. (a) Find the magnitude and direction of the electric field this disk produces at a point P on the axis of the disk a distance of 2.00 cm from its center. (b) […]

Depletion force, powerpoint presentation with calculations concise but well explanied this is powerpoint on Depletion force based on Robert Philips book The Physical Biology of Cell and the research paper The depletion attraction: an underappreciated force driving cellular organization. Marenduzzo D, Finan K, Cook PR. J Cell Biol. 2006 Dec 4;175(5):681-6. this presentation was presented […]

Physics-soap bubble As a soap bubble (n = 1.33) evaporates and thins, the reflected colors gradually disappear. (Assume that visible light has a wavelength range of 400 – 700 nm.) (a) What is its thickness just as the last vestige of color vanishes? Not 300, 300.75, 150, nor 150.38. b. What is the last color […]

Problem 26.18: Conserving energy You want to coat the /inner/ surfaces of your windows (which have refractive index of 1.51) with a film in order to enhance the reflection of light back into the room so that you can use bulbs of lower wattage than usual. You find that MgF2, with n = 1.38, is […]

Bill has come upon a 37 gram of iodine -131. Bill has come upon a 37 gram of iodine -131. He isolates the sample and waits for two weeks. After this time period, only 11 grams of iodine -131 remains. What is the half-life of this isotope? Is this the question you were looking for? […]

A certain nuclear power plant produces radioactive waste in the form of strontium-90 A certain nuclear power plant produces radioactive waste in the form of strontium-90 at the constant rate of 500 pounds per year. The waste decays exponentially with a half life of 28 years. How much of the radioactive waste from the nuclear […]

The half-life of X is 1.5 hrs. The half-life of X is 1.5 hrs. A 50 gram sample is the amount we have to study. How much remains after 10 hrs? How many minutes will it take for the sample to have a remaining mass of 30 grams? Is this the question you were looking […]

Velocity and accelaration. Ans; Here a= 4 m/s2 and t= 10 s We know: S= ut+ 0.5at2 Or s=0*10 + 0.5*4*100 Or s= 0+ 200 Or s= 200m So it will travel 200 m. Is this the question you were looking for? If so, place your order here to get started!