Physics question and answers for July 08, 2023
- Q Consider driving a car in one direction along a straight roadfor 10 minutes. You start from rest. During the first 1 minute, youspeed up with constant acceleration until you reach...
- Q Choose true or false for each statement regarding the resistanceof a wire.true false  While maintaining a constant voltageV, the current I increases when the lengthL of a wire increases.true false  The resistance...
- Q In a darkened room, a burning candle is placed 1.85 m from whitewall. A lens is placed between candle and wall at a location thatcauses a larger, inverted image to...
- Q Describe the limitations of light wave theory in accuratelypredicting blackbody radiation and Planck's solution
- Q Sketch 2 curves on the same graph for mammalian cells: afterX-rays and after alpha-particles irradiation. Explainquantitatively the dependence on radiation dose of the survival forX-ray curve at low doses (up...
- Q 1.The range from high to low tide in a particular bay is foundto be d meters. The variation in heightof the water acts as simple harmonic motion with a period...
- Q Topic 4: Echo Sounder and Speed Logs:According to your Knowledge, answer the followingquestions:a. In Echo sounder systems some devices has one transducer(transmitting and receiving transducerin one unit) and the other...
- Q Briefly explain the operational principals and the maincharacteristics of photomultiplier tubes (PMT) detector.
- Q Describe briefly how the oxygen status of tumors may be assayedand why such an assay would be conducted. Summarize briefly theadvantages and disadvantages of the two alternative radiationmodalities using neutrons...
- Q The liquid fluoride thorium reactor (LFTR)1. how will the LFTR provide benefits?2. how might the LFTR produce harm?3. will the LFRT be gendered?4. what might be the malfunction risks?5. how...
- Q A 91 kg crate, starting from rest, is pulled across a floor witha constant horizontal force of 340 N . For the first 15m the flooris frictionless, and for the...
- Q 3. The atmosphere is in constant motion. Why? What is thegeneral pattern of airflow? Explain why there is this generalpattern of airflow and why atmospheric gases don’t simply flow intoouter...
- Q Is the sun's gravitational pull on the moon greater or less thanthe earth's pull on the moon? The sun doesn't steal our moon away,so the earth must be pulling harder,...
- Q An electrically charged point particle with a mass of 1.15 x10-6 kg is launched horizontally into a uniform electricfield with a magnitude of 914 N/C. The particle's initial velocityis 7.15...
- Q (a) Compute the Coulomb repulsion energy between two nuclei of16O that just touch at their surfaces. (UseR0 = 1.2 10-15 m asnecessary.)________MeV(b) Do the same for two nuclei of 238U.(c)...
- Q In our review of fluids this week, particularly of fluids inmotion, we have come across 3 important rules that govern thatmotion: the continuity equation, Bernoulli's principle, andPoiseuille's principle. For each...
- Q In your post do both of the following:o Select one of the ARRT Standards of Ethics (Code of Ethics)and discuss how it relates to minimizing radiation exposure topersonnel and patients...
- Q In a system of three particles, each particle has three quantumstates. The energies of these situations are 0.3? and 5?,respectively. Write the partition functions of the particles thatmeet the following...
- Q please do not change the category.you just typing no drawing needed i need Just speed and fewsentences! its easy for you.problem1) Describe the pros and cons between BJT the Voltage...
- Q A uniform ladder 5.30Â Â m long rests against africtionless, vertical wall with its lower end 3.10Â Â mfrom the wall. The ladder weighs 161Â Â N . The coefficientof static friction between the foot of...
- Q 1.a) An apple weighs 1.12 N . When you hang it from the end of along spring of force constant 1.57 N/m and negligible mass, itbounces up and down in...
- Q A circular ring with area 4.45 cm2 is carrying a current of 12.5A. The ring, initially at rest, is immersed in a region of uniformmagnetic field given by B⃗ =(1.25×10−2T)(12i^+3j^−4k^)....
- Q 10. Obtain the expressions of electric and magnetic fields byperforming the mode analysis for TM mode in two-side triangularcross-section transmission pipes. Find the attenuation for thedominant mode.
- Q A 600 Mrad/s EM wave travels through air and is polarized withthe electrical field normal with the plane of incidence. This waveimpinges on the surface of a perfect conductor on...
- Q 1. Assume the axon had a diameter of 30um and was 5 cm long. Thecapacitance of this axon would be ____ nF.2. Number of Na+ ions that are present before...
- Q Check out this cost equation for the cost of a cab ride when m miles are driven: C = 5.1 +2.6m. What does the 5.1 represent? What does the 2.6...
- Q A proton and an alpha particle are released from rest when theyare 0.240 nm apart. The alpha particle (a helium nucleus) hasessentially four times the mass and two times the...
- Q 1.A physical pendulum is formed by a two-part structure. Onepart is a thin uniform rod of mass 0.72 kg which is free to swingabout an axis at one end. The...
- Q The US generates ∼ 4,000 million megawatthours (MWh) ofelectricity per year (source: DOE1 ). Note: a MWh has units ofpower × time, or energy. Assume that the demand for this...
- Q The constant-speed magnetization curve for a 25-kW, 250-V dcmachine at a speed of 1200 r/min is shown in figure below. Thismachine is separately excited and has an armature resistance of0.14...
- Q 6-(a)Being a technical person which type of electrical devicesis used for measuring the insulating properties of electricalcables and equipment. Explain the identified instrument withworking principle, operation with neat diagram.(b) In...
- Q 1. A moving particle with a charge of 6.52 is acceleratedthrough a potential difference of 234mV. Find the final velocity ofthe particle if its initial velocity is 5.24m/s. (mass of...
- Q You are working for SETI, the Search for ExtraterrestrialIntelligence. One day, you receive a radio communication from analien intelligence. Although you cannot understand their language,they have included some photos from...
- Q 238Pu decays to 234U via alpha () emission with a half-life of87.7 years; each ejected alpha particle has an energy ofapproximately 5.6 MeV. Estimate the (thermal) power produced by therover...
- Q (a) Discuss how the crystal diffraction data by XRD differs from that Double slits and/or diffraction gratings in general physics.(b) These experiments and analyzes are based on the simple fact...
- Q Three discrete spectral lines occur at angles of 10.7°, 14.3°,and 14.6° in the first-order spectrum of a grating spectrometer.(Assume that the light is incident normally on the gratings.) (a)If the...
- Q A physicist wants to prove that electrons can behave as waves byobserving a diffraction pattern when a beam of electrons hits ametallic crystal of atomic spacing d. After accelerating theelectrons...
- Q A converging lens has a focal length of 20.0 cm. Locate theimages for each of the following object distances. (Enter'infinity' for the image distance if necessary.) For each case,state whether...
- Q Answer the following questions using the Bohr model of thehydrogen atom.a) A hydrogen atom is the n = 3 excited state when its electronabsorbs a photon of energy 4.40 eV....
- Q Electrons in a cathoderay tube start from rest and are accelerated through a potentialdifference of 12.2 kV. They are moving in the +x-directionwhen they enter the space between the plates...
- Q what is stochastic effect of radiation exposure? explainthis.
- Q Explain why a conductor in electrostatic equilibrium should haveno electric field parallel to its surface, nor within its bulk.(Hint: think about forces on a few charged particle).
- Q (a) One of the first \"pure\" Bose Einstein condensates wascreated with a low density (1020 molecules per cubicmeter) gas of lithium with an atomic mass of 7.02 u. What is...
- Q The two main mechanisms by which X-rays interact with matterare via Compton scattering and absorption by the photoelectriceffect. By referring to the dependence of these effects on X-rayenergy, explain what...
- Q what are radioactivitys that occur naturally
- Q A circular conducting loop with radius 2.70 cm is placed in auniform magnetic field of 0.680 T with the plane of the loopperpendicular to the magnetic field, as shown. The...
- Q You have 2 diffraction gratings, one with 2000 lines/cm, theother with 5000 lines/cm. You are also given a light source thatemits 450 nm blue light and 530 nm green light...
- Q You take a glass of water (.45 L) made of Pyrex out of yourkitchen cabinet and fill it up to the very top with very coldwater, at 5oC.   You put...
- Q An object has a measured volume of 800 cm3. It is tiedto a string and fully submerged in water (density of water =1000kgm3). The string exerts an upward force of...
- Q Drop an object from a certain height and measure the time ittakes to reach the ground. Repeat at least 5 times and average thetime data. Calculate this height by using...
- Q The magnetic flux through a 10.0-cm2cm2 loop is 8.0 Tâ‹…cm2Tâ‹…cm2,and the magnetic field at the location of the loop is uniform.Choose all correct answers.Check all that apply.A)If BB = 1.0...
- Q physics 1 honor paper outline for 5 pages of research paper forPhysics of blood flow/ pulsation of blood flow. what do you thinkare information and formulas needed. help me with...
- Q Q. 1: The far distance a person can see an object is ata distance of 50 cm from the eye but she wants to see an object atinfinity. What types...
- Q 1.How could you remove the placemat without removing the plate?2. Suppose you jumped onto a bathroom scale. The scaleinitially indicates a high weight and then settles down to youractual weight....
- Q In one page discuss the difference between characteristic x-raysand bremsstrahlung x-rays and outline which of them is used forcrystal studies.
- Q A simple camera telephoto lens consists of two lenses. Theobjective lens has a focal length f1 = 38.7 cm . Precisely 36.3 cmbehind this lens is a concave lens with...
- Q A spring is to be designed to fit over a valve rod of 15 mmdiameter as shown in figure Q2. The forces acting on the springwhile closing and opening of...
- Q Two cars are moving at 60 mph in the same direction and in thesame lane. The cars are separated by one car length (20 ft) foreach 10 mph. The coefficient...
- Q Afeather, a golf ball, and a bowling ball, are placed in a vacuumnear the surface of the Earth. All items are released from rest atthe same time and from the...
- Q Describe how Copernicus explained the retrograde motion of theplanets in his heliocentric model.
- Q Is there any experimentally measurable difference between anair-filled primary and an iron-filled primary?Look up the in the CRC Handbook of Chemistry and Physics themagnetic susceptibility of aluminum and any of...
- Q What is the Born Oppenheimer approach? b) considering it write theHamiltonian of the H2 molecule
- Q Briefly describe the diffraction of x rays( or electrons) fromcrystal planes. Derive Bragg law based on constructive andextinctif interference. Indicate the difference in diffractionbetween XRD and TEM.
- Q You have a great summer research position in a researchlaboratory working on generating power from fusion. You aredesigning a device that confines a hot gas of positively chargedions, called plasma,...
- Q Develop an appropriate relation between the ratio of the closingforce at any time to the original closing force (t = 0) and timefor a compression molding system.Consider the system to...
- Q Draw the electrical diagram of a VSC-STATCOM and explain how itoperates. (Keep your answer within 100 words maximum)
- Q 1.)a. Create a graph of the data below, then calculate the slope tofind the spring constant 'k'.b. Describe the functional relationship between all of this data(in other words, how does...
- Q I was listening to my radio one night and I noticed that when Iturned on my desk light there was a little blip of noise on theradio. I repeated this...
- Q A person with mass m1 = 80 kg person climbs a uniform ladderwith mass m2 = 40 kg and length L = 10 m long that rests against avertical frictionless...
- Q The vertical displacement y (x,t) of a horizontal string alignedalong the x-axis is given by the equation y (x,t) =(5.25 mm) cos[(4.70 m -1) x (14.1 s -1) t]. What...
- Q Design a second experiment to test the thin lens equation. Itshould involve a distinctly different situation. Describe theoutcome.
- Q Vibrational motion:(a) Explain difference between infinite potential well modeland harmonic potential model.(b) Explain zero-point energy.
- Q A glass pitcher containing water is pushed across a table with aconstant force, causing it to accelerate at 1 m/s2 . What will theacceleration be if...(a) the applied force is...
- Q In a double-slit experiment, light with a wavelength λ passesthrough a double-slit and forms an interference pattern on thescreen at a distance L from the slits. What statement is true...
- Q A charge of -4.00 nC is placed at the origin of an xy coordinatesystem, and a charge of 3.00 nC is placed on the y-axis at y=4.00cm. A third charge...
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