Physics question and answers for August 04, 2023
- Q #1 A microwave oven has a power requirement of 1,261 W. A frozendinner requires 4.1 min to heat on full power.(a) How much electrical energy (in kWh) is used?_________kWh(b) If...
- Q In a neutron scattering experiment, a neutron scatters off thestationary nucleus of an atom with an atomic mass of 61 amu in a 1dimensional, elastic collision. After the collision, whatpercentage...
- Q Writea 6-7 on how the ‘theory’ for projectile motion of the ‘stream ofwater’, (i.e., many small water particles), may useful to design afountain.
- Q M, a solid cylinder (M=1.71 kg, R=0.133 m) pivots on a thin,fixed, frictionless bearing. A string wrapped around the cylinderpulls downward with a force F which equals the weight of...
- Q I have to do an experiment/ demonstration for my PHY251 class(Calculus based physics). I am only allowed to do it on one of thefollowing topics: Vectors, Accelerated motion, Centripetal force,Free...
- Q Beryllium-8 is an unstable isotope and decays into two αparticles, which are helium nuclei with mass 6.68×10−27kg. Thisdecay process releases 1.5×10−14J of energy. For this problem,let's assume that the mass...
- Q Compare (take the ratio) the rate of heat conduction through a20.0-cm-thick wall that has an area of 10.0 m2 and a thermalconductivity twice that of glass wool with the rate...
- Q You have three charged conducting spheres. The magnitude ofthese charges are 4C, 5C and 6C. Without knowing which charges arepositive and which charges are negative, which of the followingcould represent...
- Q A white billiard ball with mass mw = 1.33 kg ismoving directly to the right with a speed of v = 2.96 m/s andcollides elastically with a black billiard ball...
- Q A 10?? object hangs from a rope. The charge of the object is 30??. The object hangs 0.5 ? above a charge of −20 ?? on thefloora) Find the tension...
- Q 1) The curl of gradient = 02) The divergence of curl = 0I know how to prove these mathematically but can youexplain me with a physical example or interpretation as...
- Q A monatomic ideal gas is at an initial pressure of 1.54 atm and76.0 cm3. The gas undergoes an isochoric increase in pressure to2.31 atm, then an isobaric expansion to 114...
- Q 1. Which of the following would not be observed if you observedthe sky without a telescope? (More than one answer can becorrect).Venus moves relative to the Sun.Mars moves relative to...
- Q (1A) Light of wavelength 534.0 nm illuminates a double slit, andthe interference pattern is observed on a screen. At the positionof the m = 82.0 bright fringe, how much farther...
- Q A ball of mass m is attached to a string of length L. It isswung in a vertical circle with enough speed to keep the stringtaut throughout the motion. Assume...
- Q n = 4.33 mol of Hydrogen gas is initially at T = 378 Ktemperature and pi = 2.88
- Q A cylindrical air tank has dimensions diameter = 0.2m and height0.8m. an attached pressure gage reads 200 kPa and the temperatureis 27 celcius. an electrical heater is energized inside and...
- Q If I want to design an experiment related to kinetic friction,can the following proposal meet the requirement?By varying the weight of an object and measure the stoppingdistance of that object.Is...
- Q A 1,300-N crate is being pushed across a level floor at aconstant speed by a force F of 390 N at an angle of 20.0° below thehorizontal, as shown in...
- Q A 4.50 kg solid cylinder with radius 10.0 cm is allowed to rolldown a uniform slope that has been inclined at 22°. The cylinder isstationary at the top and the...
- Q 6. Given the Earth's albedo of A = 0.3, whatsurface temperature do you predict at equilibrium? Is thisconsistent with the Earth's actual average temperature of 14C? Howdo you explain the...
- Q Two semi-infinite grounded conducting planes intersect at 60degrees. A point charge is situated inside this wedge-shapedregion.(a) Find image charges to obtain the potential between theconductors.(b) Can you use the result...
- Q A 1094 kg van, stopped at a traffic light, is hit directly inthe rear by a 727 kg car traveling with a velocity of +2.41 m/s.Assume that the transmission of...
- Q testing a scientific hypothesis involves four main steps.examine each of these steps in detail.
- Q A large, two-story office building has a first floor whichmeasures 500 ft by 750 ft and a second story which is 500 ft by 500ft. This building used 76,650 GWh...
- Q Derive the expression for the Roche Limit using force balance andexplain what it is.
- Q An accelerator in an automobile is defined as anything a persondirectlyinteracts with, resulting in a change in motion of the vehicle.Your mission is to list at least 12accelerators that you...
- Q A spring that has a force constant of 1050 N/m is mountedvertically on the ground. A block of mass 1.40 kg is dropped fromrest from height of 1.40 m above...
- Q Indicate whether the following statements are true or false.(Select T-True, F-False. If the first is T and the rest F, enterTFFFFF).A) A white dwarf is the remnant of the star's...
- Q Research 3 types of technology that we have in our worldthat are related to either Kepler's Laws or The Universal Law ofGravity. The technology can be directly related to these...
- Q a. Two point charges each of magnitude +5.0ï‚´10-9 C are placed8.0 cm apart in air. Calculate, i. the electric potential, and ii.the electric field strength at a point, P which...
- Q Choose the correct statements from the following list referringto white dwarfs. (Give ALL correct answers, i.e., B, AC,BCD...)A) White dwarfs are less dense than red giants.B) White dwarfs cool slowly...
- Q A gigantic parallel plate capacitor with area of plates of1.1x108 m 2 and separated by distance 1500 m connected to source ofa potential difference 35 million volts. Define potential energy...
- Q what will be transient telegrapher's equation solution usinglaplace transforms if R,G parameter is not zero.Where R= RESISTOR OF WIRE AND G= conductance between line.
- Q A converging lens forms an image 20 centimeters  highof an object that is 5 centimeters high.part a calculate the magnification factor m of the lenspart b Explain how you can calculate...
- Q The mass of Uranus is 8.68 x 1025 kg. That’s 14.536times more than the mass of Earth.What is the difference between the forces due to Uranus on a 1.0kg mass...
- Q The heavy boy and light girl are balanced on the seesaw. If theyboth move inward so that each is exactly half the original distancefrom the pivot, then the 1) boy's...
- Q A car drives around a curve with radius 420 m at a speed of 37m/s. The road is banked at 5.4°. The mass of the car is 1500 kg.(a) What...
- Q Suppose that a person has an average heart rate of 98.0beats/min. (Express your answers to problems in this section to thecorrect number of significant figures and proper units.)(a)How many beats...
- Q Briefly explain the main differences of heat capacity approachesof solid between Einstein, Debye and classic thermodynamicmodel.
- Q A baseball is thrown from the roof of 23.5 m -tall building withan initial velocity of magnitude 10.5 m/s and directed at an angleof 52.4° above the horizontal.What is the...
- Q Can someone explain what internal energy is and how to calculateit when given mass, friction, speed etc? Is it always the samething as non-conservative work..?
- Q Bohr theory of the atom:In the hydrogenic Bohr orbit of quantum number n compute theratio of the circumference of the orbit to the wavelength of theelectron. Provide an interpretation of...
- Q 1-The Large Hadron Collider in Europe smashes togethernear-light speed protons to discover new fundamental particles ofnature. As part of the detection process, the “debris†from thecollision is made to pass...
- Q A horizontal disk with radius R and charge density σ is centeredoriginally. A particle with charge Q and mass m is in equilibriumat a height h above the center of...
- Q Answer the following four sub-questions. Each sub-question isindependent and has no no link with the other sub questions. a) Twoneutral spheres are spaced 3 m apart. Calculate how many electronsmust...
- Q 4 questions:1). A 5 cm spring is suspended with a mass of 2.417 g attachedto it which extends the spring by 2.409 cm. The same spring isplaced on a frictionless...
- Q Assume if the shear stress in steel exceeds about4.00x108 N/m2 the steel  ruptures.(a) Determine the shearing force necessary to shear a steel bolt1.25 cm in diameter.(b) Determine the shearing force necessary...
- Q A 155 gg mass attached to a horizontal spring oscillates at afrequency of 3.70 Hz . At t =0s, the mass is at x= 6.40 cmcm andhas v =− 45.0...
- Q 8. How do mirrors for most lasers achieve high(>95%) reflectivity not possible with simple metal coatingsalone? Describe the structure of these mirrors (include a diagramshowing the \"stack\" of multiple layers...
- Q What is the purpose of the ballast resistance in aHeNe supply? Make specific reference to the electricalcharacteristics of a gas discharge as compared to an \"ohmic\"resistance. What might happen to...
- Q At t=0t=0 the current to a dc electric motor is reversed,resulting in an angular displacement of the motor shaft given byθ(t)=(θ(t)=( 260 rad/srad/s )t−()t−( 20.5 rad/s2rad/s2 )t2−()t2−(1.49 rad/s3rad/s3 )t3)t3.A- At...
- Q \"Summarize the pairing effect in terms of lowest angularmomentum of nucleons.
- Q A small current loop can be used as a compass. (a) When it'splaced in an external magnetic field, which plane will it berotated into, and in which direction will its...
- Q An entrepreneur has proposed sending a probe to Alpha Centai 4light years away. His idea is to use a \"solar sail\", which is alarge area reflective sheet, and propelling the...
- Q what percentage by volume of a water polo ball lies under thewaterline as it floats in still water?
- Q Given: M1= 75kg; M2 = 50kg; V (M1) = 10 m/s North; V (M2) = 10m/s WestAction: Collision, two masses stick together, move atunspecified angle in M2's initial directionQuestion: Find...
- Q An unstable nucleus of mass 1.7 ✕ 10−26 kg, initiallyat rest at the origin of a coordinate system, disintegrates intothree particles. One particle, having a mass ofm1 = 1.8 ✕...
- Q Anemf is induced in a conducting loop of wire 1.20 m long as itsshape is changed from square to circular.Find the average magnitude of the induced emf if the change...
- Q A guy was dumped by his girlfriend and wants to jump off from abuilding 200 ft high. What is the required velocity he must startin order to touch down on...
- Q Problem StatementCharges -2nC and 2nC are located at x= -0.1cm and x=0.1cmrespectively. Determine the electric field at the points (-1 cm, 0cm), (1 cm, 0 cm), (0 cm, 1cm), (0...
- Q My question is would this lab procedure be a valid method ofcalculating the coefficient of static friction when you are onlyallowed to make measurements of distance and not of mass....
- Q 1.at some fancier sledding hills there is a motorized rope loop usedto pull sledders back to the top of the hill. the hillside isinclided at 25 degrrees and the rope...
- Q what is the equation of motion that governs sound production in asimple coil speaker?i know that there is an electromagnetic force that is createdby the current which interacts woth the...
- Q Problem 1 [6] Compute the eigenvalues of Hˆ = pˆ 2 2m + 1 2 mΩ2xˆ 2 + λxˆ using two different methods: 1. Complete the square in1 2mΩ 2x...
- Q In winter, people play hockey on Alta Lake in Whistler.However, it is not considered safe by the Canadian Red Cross toplay hockey on ice until the ice is 20 cm...
- Q a)if energy is not a vector, what is the diffwrneve between a \"+\"work and a \"-\" work?b) Give an example of a system in which the total energy isconstant, yet...
- Q A gas is compressed at a constant pressure of 0.800 atm from9.00 L to 2.00 L. In the process, 350 J of energy leaves the gas byheat.(a) What is the...
- Q a.) show that a simple pendulum has a stable equilibriumpoint at theta=0.b.) Find the natural frequency w of the system. (showwork)
- Q A4μCchargeisplacedatthepoint⃗r1 =2ˆicmandan-4μCchargeisplacedat⃗r2 = −2 ˆi cm. The charges do not move. a. What is the electricfield (magnitude and direction) at the origin? b. What is theelectric field (magnitude and direction)...
- Q You are part of a searchand- rescue mission that has been calledout to look for a lost explorer. You’ve found the missing explorer,but you're separated from him by a 200-m...
- Q The bright yellow sodium line in the sodium spectrum is actuallya pair of closely spaced lines at 589.0 nm and 589.6 nm. Youobserve the sodium spectrum using a diffraction grating...
- Q A small rock moves in water, and the force on it by the water isgiven by f=kv. The terminal speed of the rock is measured and foundto be 2.0m/s. The...
- Q a.) Derive the equations of motion for an object with mass(m1)that is orbiting the second object of mass (m2>>m1) in aperfectly circular orbit with radius(R) and orbital period (T).(Use lagrangian...
- Q What are the characteristics of an ideal radiation shield?
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