Physics question and answers for July 19, 2023
- Q An air-track cart with mass m1=0.30kg and initial speedv0=0.95m/s collides with and sticks to a second cart thatis at rest initially.Part AIf the mass of the second cart is m2=0.44kg,...
- Q 3. 2 moles of an ideal gas at 17oC has a pressure of 760mmmercury, and is compressed once isothermally and then adiabaticallyuntil its volume is halved [in each case reversibly...
- Q A device used in radiation therapy for cancer contains 0.33 g ofcobalt-60 (59.933 819 u). The half-life of this isotope is 5.27 yr.Determine the activity (in Bq) of the radioactive...
- Q Using ExcelQuestion 2: An electromagnetic projectile launcher has beenbuilt. You are tasked with developing a model for the velocity ofthe projectile.The launcher stores energy in a capacitor, which is charged...
- Q If a coal-fired power plant burns 2 kg of coal to produceelectricity, and the electricity is used to power an elevator motorthat is 60% efficient, how high can the elevator...
- Q Consider the gas phase dissociation of iodineI2(g)↔2I(g)A. Calculate the thermal wavelength of 127I atT=298K.B. Calculate the translational partition function of127I at T=298K. Assume P=1.00atm and V=24.4L.C. Calculate the rotational partition...
- Q It's cold--check your tires.When it gets cold, you have to add more air to car tires. If a1.90×10−2 m3m3  car tire at 299KK  has an *absolute* pressure of only 213 kPaHow many...
- Q A light source emitting radiation at 7.00∙1014 Hz is justcapable of ejecting photoelectrons from Eiteneerium (Ei).A. What can be done with the light to produce no photoelectrons?Explain conceptually in one...
- Q An apple with mass 0.4 kg is hanging at rest from the lower endof a light vertical rope. A dart of mass 0.1 kg is shot verticallyupward, strikes the bottom...
- Q A car travelling at constant speed passes by a stationarypedestrian as the car driver sounds the horn. As the car approachesthe pedestrian she hears the horn sounding at 50 Hz....
- Q A particle (mass = 6.7 x 10-27 kg, charge = 3.2 x 10-19 C) movesalong the positive x axis with a speed of 4.1 x 105 m/s. It entersa region...
- Q A teacher places a fluid substance, with a refractive index of1.65, between two horizontal panes of flat glass (each of which hasn = 1.50). He then illuminates the assembly from...
- Q Show that if the acceleration is always perpendicular to thespeed, the speed is constant.
- Q Explain briefly how Faraday’s law is used to produce electricityin a coal-fired power station?
- Q what is Maxwell’s Equations, list and name , write in details,mention the mathematical forms and in physics form, then explianthem by physics? and name and explain any symbols like: B...
- Q Ampère's law in free space may be written as ∮ ? . ?? = ???a) Write the equation in words, giving the meaning of eachparameter.b) Starting with the equation above...
- Q When two waves are overlapped on each other in the same medium, arethey still two waves, or is the result a single wave? explain
- Q Answer the following questions for an orbit with the followingPosition and Velocity vectors:(R = 7626I + 4972J + 806K km, V = 0.626I - 0.690J - 6.160Kkm/s)1. Determine the size...
- Q Cell Membranes and DielectricsMany cells in the body have a cell membrane whose inner andouter surfaces carry opposite charges, just like the plates of aparallel-plate capacitor. Suppose a typical cell...
- Q 1) An unmarked police car, traveling a constant 95 km h , ispassed by a speeder traveling 145 km h . Precisely 1.00 s after thespeeder passes, the policeman steps...
- Q Can you explain the use of X-rays for determining the structureof solids and for medical imaging (CT scans) and explain the mainphysical difference between the two? I'm confused as to...
- Q How todesign an experimentIn a lab, youwill have access to a mystery metal, a string, a retort stand, abeaker, a kettle, water, two thermometers, a stopwatch, a weightscale, and an...
- Q A solid motor has an average thrust of 67,000 N, a specificimpulse of 285 sec, and a propellant mass fraction of 0.92.Calculate the total mass of the vehicle for a...
- Q Bob has just finished climbing a sheer cliff above a beach, andwants to figure out how high he climbed. All he has to use,however, is a baseball, a stopwatch, and...
- Q You're driving down the highway late one night at 15 m/s when adeer steps onto the road 42 m in front of you. Your reaction timebefore stepping on the brakes...
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