Physics question and answers for August 18, 2023
- Q While out on your 3rd floor apartment balcony, you noticesomeone drop a 8.0 kg ball from rest from the roof of the 5 storybuilding across the street. You know that...
- Q An electron (in a hydrogen atom) in the n=5 state dropsto the n=2 state by undergoing two successivedownward jumps. What are all possible combinations of the resultingphoton wavelengths?
- Q A quasiparticle of mass m is trapped by an extended crystaldefect, which has a shape of a narrow, straight tube of length l.The quasiparticle hence is confined to move within...
- Q Use a computer to make two plots of the Boltzmann, Fermi-Dirac,and Bose-Einstein distributions functions versus x=(LaTeX:\epsilon-\mu ϵ − μ )/kT. For one make both axes linear. For theother make the...
- Q List out at least two uses for an RC circuit and explain how theRC would affect the use.
- Q A long wire carrying a 6.0 A current perpendicular to thexy-plane intersects the x-axis at x=−2.3cm. A second, parallel wirecarrying a 2.6 A current intersects the x-axis at x=+2.3cm.
- Q 1. The Cosmic Microwave Background and PrizewinningCosmology(a) How can we see the CMB if the photons were released 14billion years ago? Shouldn't those photons be billions of lightyears away by...
- Q You are given a new puppy as a birthday present and are eager toplay with her. However, you soon come to realize that your newpuppy has other plans. She decides...
- Q Fans at a heavy metal band concert are subject to tunes at anintensity of 1.5 watt/m2. The density of dry air at 273K is 1.293g/L and the speed of sound...
- Q A physicist builds a parallel-plate capacitor with adjustablespacing between the plates. When the plates are at their initialseparation, the capacitance is 7.00 µF.(a) At this capacitance, the capacitor is connected...
- Q A piece of equipment functions such that a hot reservoir at 605K transfers 1150 J of heat irreversibly to a cold reservoir at atemperature of 296 K.1)What is the change...
- Q DATA AND RESULTSMass of Ball: .059 kgTrialInitial Height (yi)Final return height (yr)Time to groundTime to return14 m2.2 m.882 s.644 s23.5 m2 m.830.615 s33 m1.7 m.772 s.561 s1. The potential energy...
- Q A solid sphere, radius R, is centered at the origin. The“northern†hemisphere carries a uniform charge density Ï0, and the“southern†hemisphere a uniform charge density −Ï0. Find theapproximate field E(r,θ)...
- Q The current theory of the structure of the Earth, called platetectonics, tells us that the continents are in constant motion.Assume that the North American continent can be represented by aslab...
- Q A hiker travels 22.5 km at 45.0 degrees in 10.0 hrs on day one,18.0 km at 75.0 degrees in 9.50 hours on the second day, and 13.0km at 130.0 degrees...
- Q The planet Venus can never reach which planetary configurationwhen viewed from Earth?oppositionsuperior conjunctioninferior conjunctiongreatest elongationThe strength of gravity on Mars is about 40% of that on Earth.If you were to...
- Q 1 a) How is density , specific gravity and specific weightrelated to each other? Write formula and specify SI units for eachof these terms.1 b) How does density, vapour pressure...
- Q A scientist measuring the resistivity of a new metal alloy lefther ammeter in another lab, but she does have a magnetic fieldprobe. So she creates a 7.5-m-long, 4.0-mm-diameter wire of...
- Q A penguin has decided to jump between two small icebergsfloating in the ocean near Antarctica. You may neglect waterresistance and treat the motion of the icebergs relative to thewater as...
- Q The earth’s north pole is a magnetic south pole. Thefield above the pole is ~0.05mTesla. A proton from the sun with avelocity of 1,000,000 m/s enters this magnetic field.a) Find...
- Q In a city park a nonuniform wooden beam 9.00 m long is suspendedhorizontally by a light steel cable at each end. The cable at theleft-hand end makes an angle of...
- Q source of error for feedback biasing transistor experiement
- Q A parallel beam of 1-MeV photons is normally incident on a1.2-cm aluminum slab (Ï = 2.70 g cm–3 ) at a rate of103 s–1 . The mass attenuation and massenergy-...
- Q Consider how the intensity of light changes as it passes betweentwo Polaroid disks at different angles to each other. (For thisscenario, suppose that the polaroid closest to the light sourceremains...
- Q A hydrogen molecule (H2) in its electronic,vibrational and rotational base state, absorbs a photon offrequency 1,356 x 1014 Hz and has a transition to astate with n = 1, l...
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