Physics question and answers for September 04, 2023
- Q A 1.90-kg particle moves in the xy plane with a velocity of vwith arrow = (4.00 i − 3.70 j) m/s. Determine the angular momentumof the particle about the origin...
- Q As a city planner, you receive complaints from local residentsabout the safety of nearby roads and streets. One complaintconcerns a stop sign at the corner of Pine Street and 1st...
- Q I've been getting confused with how to actually take a wave andconvert into a fourier spectrum and was wondering if I could get anexplanation?
- Q A line of charge 2.0 m long has 50.0 nC of charge uniformlydistributed along it. (a) Calculate the electric field 0.25 m abovethe center of the line. (b) If the...
- Q A uniform board of length L=.75mis sliding along a smooth, frictionless horizontal plane. The boardslides across a boundary with a rough horizontal surface. Thecoefficient of kinetic friection between the board...
- Q Two people are headed towards each other on skateboards andexperience very little friction or airresistance. One person hasmassm1= 40 kg and one has mass m2= 80 kg. If they are...
- Q Contrary to popular belief, lightening rods don’t really attractlightening strikes. How do they work?
- Q Consider a solid, insulating sphere of radius a = 5.00 cmcarrying a net positive charge of Q = 3.00 μC uniformly distributedthroughout its volume. Concentric with this sphere is a...
- Q A DC current does not go through the capacitor after the initialcharging. Check the equation that describes the impedance in RCcircuits when the frequency f decreases to zero (which is...
- Q A parallel plate capacitor with plate separation d isconnected to a battery. The capacitor is fully charged toQ Coulombs and a voltage of V volts. LetC be the capacitance and...
- Q A 0.836 kg toy car is powered by one 9V battery (9.00 V)connected directly to a small DC motor. The car has an effectiveenergy conversion efficiency of 36.1 % ,...
- Q A portable radio is sitting at the edge of a balcony 5.1 m abovethe ground. The unit is emitting sound uniformly in all directions.By accident, it falls from rest off...
- Q A transformer is intended todecrease the value of the alternating voltage from 500 volts to 25volts. The primary coil contains 200 turns. Find the necessarynumber of turns N2 in thesecondary...
- Q A copper wire has a diameter of 3.247 mm. What magnitude ofcurrent flows when the drift velocity is 4.40 mm/s? Take thedensity of copper to be 8.92 g/cm3. Give your...
- Q Givens:Altitude: FL310 (31,000 ft Pressure Altitude)Indicated Airspeed: 250 KIASIndicated Outside Air Temperature (IOAT) or Total Temperature:-30 deg CFigure 2.1 for AtmosphereFigure 3.1 Position ErrorsFigure 3.2 Compressibility ErrorsFigure 11.2 or Tt...
- Q An insulated wall consists of an exterior wood layer ofthickness 3.1 cm and an interior layer of foam insulation ofthickness 2.3 cm . For the wood, k=0.080W/(mâ‹…K), and for the...
- Q Four point masses are arranged as follows: m1 = 5.76 g at(0,19.6 cm), m2 = 2.25 g at (19.6, 0) cm, m3 = m1 at (0,-19.6) cmand m4 = m2/.49...
- Q Twopoint charges q1 = 5.00nC and q2 = -8.00nC are separated by 25 cm.What is the electric potential at the point between twocharges at a distance 10 cm from charge...
- Q When t = 0, the position of a point is s= 6m, and its velocityis v= 2m/s. From t = 0 to t= 6s, the acceleration of the point is...
- Q 1.How do tuning forks produce sound waves? Explain.2. What physical aspect of the fork determines thewavelength?3. Where are the nodes on a tuning forks?4. Why does the sound produced depend...
- Q A spacecraft with a proper length of 350 m passes by an observeron the Earth. According to this observer, it takes 0.780 µs for thespacecraft to pass a fixed point....
- Q Two rectangular pieces of plane glass are laid one upon theother on a table. A thin strip of paper is placed between them atone edge, so that a very thin...
- Q A uniform cubical crate is 0.575 m on each side andweighs 900 N. It rests on the floor with one edge againsta very small, fixed obstruction. At what height above...
- Q Explain the following natural events in terms of the laws ofphysics that you have learned in this class. Include figures ifnecessary. Answer any two.How does a bird fly?If you keep...
- Q (a) Using Kirchhoff’s laws, derive an equation for the voltages,V1 and V2, across two resistors, R1 and R2, in series connected toa voltage supply V .(b) Using Kirchhoff’s laws, derive...
- Q A picture window has dimensions of 1.40 m
- Q 1- relate characteristics of semiconductor basic mechanism ofelectrical conduction2- determine important parameters of semiconductor3- describe operation principle of semiconductor devices4- demonstrate the understanding of intrinsic-extrinsicsemiconductor characteristic`.
- Q A 120-pF capacitor and a 480-pF capacitor are both charged to3.10 kV. They are then disconnected from the voltage source and areconnected together, positive plate to negative plate and negativeplate...
- Q A 45 kg figure skater is spinning on the toes of her skates at0.50 rev/s . Her arms are outstretched as far as they will go. Inthis orientation, the skater...
- Q Current passes through a solution of sodium chloride. In 1.00second, 2.68
- Q A spherical bowling ball with mass m = 3.3 kg and radius R =0.11 m is thrown down the lane with an initial speed of v = 8.9m/s. The coefficient...
- Q 16. Briefly explain why each of the following statements islikely to be either true or false, giving reason(s) based on theconcepts discussed in class. Ignore friction.a) A sports utility vehicle...
- Q William Tell is said to have shot an apple off his son’s headwith an arrow. If the arrow was shot with an initial speed of 50.0m/s and the boy was...
- Q Akao
- Q Two resistors when connected in series to a 120-VV line useone-fourth the power that is used when they are connected inparallel.Part AIf one resistor is 2.6 kΩkΩ , what is...
- Q The single most important use of the element gold is for wiresthat join integrated circuits to the conducting pads that thenconnect microelectronic chips with external circuitry. A typicalapplication uses gold...
- Q Aa consequence of a fall-out, two radioactive beta emittingisotopes are released. Tritium, with a physical half-life time of12 years and an average beta energy of 6keV, and137Cs,with 30 years half-life...
- Q Charge is added to a spherical conductor of radius 20.0 cm.(a) If the maximum electrical field the air surroundingthe sphere can sustain without the molecules being ionized is 3.00× 106...
- Q What quantity must be small to ensure the validity of theFresnel approximation (Use the second-order term of the Taylorseries expansion)?
- Q a pilot has his small airplane heading due north at 50 km/h.after two hours of flight he finds himself 40 km east and 70 kmnorth of his starting point. find...
- Q A 500 Kg bloack of ice at -25 degrees celsuis is placed in justenough liquid water at 100 degrees celsius to completely meltit.A) what was the mass of the hot...
- Q Hi! I have some questions I'dlike to discuss regarding an experiment with thependulumI will have a laboratory class in which I will have to measurethe period of oscillation of the...
- Q Ablock of wood of uniform density floats so that exactlythree-quarters if it’s volume is underwater. The density of wateris 1000 kg/m^3. What is the density of the block?
- Q Anelectron (charge =-1.6*10^-19C) moves on a path parallels butopposing a uniform electric field of strengths 2.3 N/C. How muchwork is done on the on the electron a sit moved 20cm?...
- Q A balloon is filled up completely with helium gas and left in aroom with a controlled temperature of 230C. After two days of beingin the same room, the balloon was...
- Q Derive The Dirac Equation.
- Q An ancient wooden club is found that contains 280g of carbon andhas an activity of 7.3 decays per second.Determine its age assuming that in living trees the ratio of14C/12C atoms...
- Q An antelope is at a distance of 20.0 m from a converging lens offocal length 27.0 cm. The lens forms an image of the animal.(a) If the antelope runs away...
- Q A juniper-wood plank measuring 0.31 ft by 1 ft by 17 ft istotally submerged in water.(a) What is its weight?(b) What is the buoyant force acting on it?(c) What is...
- Q Example #2A block with mass m = 5 kg sits on a surface with acoefficient of static friction sk= 0.5 and a coefficient of kineticfriction uk= 0.3. a)If you can...
- Q Three charges are placed on the y-axis. The first, with charge8nC, sits at y=5cm. The second, with charge -14nC, is at y=0cm.The third, -10nC, is at y=−5cm.a) What is the...
- Q A coordinate system (in meters) is constructed on the surface ofa pool table, and three objects are placed on the table as follows:a 2.0-kg object at the origin of the...
- Q Please show all work!thanks!A 80.0 cm long guitar string hasmass of 75.0g and it is kept taut with force of tension equal to800N.ï‚· Determine: (1) speed of propagation of a...
- Q briefly explain why zinc and several other divalent metalshave hall coefficients opposite in sign to those of monovalent andtrivalent metals.
- Q A machine part has the shape of a solid uniform sphere of mass220 g and diameter 2.90 cm . It is spinning about a frictionlessaxle through its center, but at...
- Q Compare Einstein's, Classical and Debye's theories of heatcapacity.
- Q Calculate the average binding energy per nucleon of each of thefollowing isotopes.(a)52 Cr24______ MeV/nucleon(b)235 U92______ MeV/nucleon
- Q A (field) hockey player is running north at a speed of 8 m⋅s−1.A ball is coming directly towards her from the north at a speed of18 m⋅s−1. She swings her...
- Q A wheel 2.25 m in diameter lies in a vertical plane and rotatesabout its central axis with a constant angular acceleration of 4.30rad/s2. The wheel starts at rest at t...
- Q 1. Consider a charge of -1 nC at (-1,0) m, and a charge of +1 nCat (1,0). Calculate the electric potential everywhere in theplane.2. For the same geometry as in...
- Q Starting from the statement that decay rate is proportional tothe number of nuclei in a sample, derive the exponential equationthat relates the number of nuclei in a sample to the...
- Q Two masses are connected by a light string, which passes over africtionless pulley as shown in fig .3 on a the chalkboard. Theinclined plane is rough. When m1=10kg , m2...
- Q (6) Moons of Mars.In 1727, Jonathan Swift wrote Gulliver's Travels in whichhe described two moons orbiting Mars. About 150 years later, theAmerican astronomer Asaph Hall used a large telescope to...
- Q Two powerful speakers, separated by 15.00 m, stand on the floorin front of the stage in a large amphitheater. An aisleperpendicular to the stage is directly in front of one...
- Q A 500 lines per mm diffraction grating is illuminated by lightof wavelength 640 nm.1. What is the maximum diffraction order seen? Express youranswer as an integer.2. What is the angle...
- Q Describe 3 ways an emf can be produced
- Q hOlaf is standing on a sheet of ice that covers the footballstadium parking lot in Buffalo, New York; there is negligiblefriction between his feet and the ice. A friend throws...
- Q Problem 2. A nuclear power plant produces radioactive waste as abyproduct. One such byproduct is anisotope of the noble gas Krypton, 36Kr85, which decays via ?- decaywith half-life T1/2 =...
- Q what is the Scientific reason behind \" why stars have starshaped\"!!
- Q A block of mass m is moving to the right at 0.25m/s, whileanother block of mass 2m is moving to the left at 0.10m/s. Bothblocks are on a frictionless and...
- Q In a synchrotron, charged particles are accelerated as theytravel around in circles; in a linear accelerator they move in astraight line. What are some of the advantages and disadvantages ofeach?
- Q A water faucet in a house is h=8 m below the water surface inthe local water tower. The radius of the orifice in the fullyopened faucet is r=0.01 m. We...
- Q Discuss how levitation can be achieved by using superconductors.
- Q Let’s say you wanted to have a communications satellite orbitthe Moon sothat it stayed exactly above one point of the Moon’s equator(similar to ageosynchronous here on Earth). What would the...
- Q What is the energy released in this nuclearreaction  63Li+10n?31H+42He36Li+01n?13H+24He? (The atomicmass of 6Li6Li is 6.015121 u, and that of  3H3H is3.01605 u)___MeV
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