Physics question and answers for August 22, 2023
- Q A parallel-plate capacitor has capacitance C = 15.7 pFwhen the volume between the plates is filled with air. The platesare circular, with radius 2.50 cm. The capacitor is connected to...
- Q Leaving home in the morning, I back down my driveway. Beforeentering the road, I realize I forgot my lunch and so I pull backin to my parking spot.What is my...
- Q A man is hiking at a park. At the beginning, he followed astraight trail. From the starting point, he traveled two miles downthe first trail. Then he turned to his...
- Q Show that an atom with a filled subshell must have a1S0 ground state.
- Q (a) Estimate the terminal speed of a wooden sphere (density0.870 g/cm3) falling through air, if its radius is 8.00 cm and itsdrag coefficient is 0.500. (The density of air is...
- Q Suppose you’re eating in yet another restaurant where the dishesare shared at the table and all placed uniformly on a rotatingdisk-like surface. Model this surface as a thin disk of...
- Q A large wrecking ball is used to destroy an old building. Theoperator uses a maximum angle of 6.0 â—¦ . When the ball is atmaximum amplitude, he starts timing the...
- Q 1)Suppose you install an objective lens that gives the microscope atotal magnification of 360x. What is the total magnification ofthis objective lens?2) Ocular and objective lenses are available in many...
- Q Two metal rods, one silver and the other gold, are attached toeach other. The free end of the silver rod is connected to a steamchamber, with a temperature of 100°C,...
- Q A projectile is shot directly away from Earth's surface. Neglectthe rotation of the Earth. What multiple of Earth's radius RE givesthe radial distance (from the Earth's center) the projectilereaches if...
- Q A block of mass m1 = 4.15 kg is released from circled A. Itmakes a head-on elastic collision at circled B with a block of massm2 = 10.5 kg that...
- Q A 4500 kg ore car accelerates at 0.4 m/s2 up a rampwhich has a 9 % grade. If the coefficient of friction µk= 0.25, calculate the force applied on the...
- Q Two 13-cm-diameter electrodes 0.56 cm apart form aparallel-plate capacitor. The electrodes are attached by metalwires to the terminals of a 11 Vbattery. After a long time, thecapacitor is disconnected from...
- Q When vertically falling sand lands in a horizontally movingcart, the cart slows. Ignoring friction, give two reasons for this,one in terms of a horizontal force acting on the cart and...
- Q Question 4An interesting topic in fluid mechanics is Bernoulli's equation,which relates pressures and velocities of a fluid with the densityof rho at different heights, eq. 13.12. It has applications in...
- Q The spinning Earth is slowing down. Our days are getting longer.The effect is real, and so we have to add \"leap seconds\" to ourclocks every 100 years to account for...
- Q Why are the following statements false?The potential energy of a system of interacting particles equalsthe sum of the potential energies of the individual particles.The value of the integral ( -...
- Q 1) Object \"A\" has twice the weight of object \"B\" at a givenpoint on the moon's surface. \"A\" must have twice the mass of\"B\".  True or False2) The two objects above...
- Q A 12.0-kg package in a mail-sorting room slides 2.00 m down achute that is inclined at 53.0∘53.0∘ below the horizontal. Thecoefficient of kinetic friction between the package and the chute’ssurface...
- Q Below is a diffraction problem. I have the solutions to theproblem but I don't know how to arrive at these solutions.A) In an experiment two slits are separated by 0.22mm...
- Q Let be a cylindrical box with a volume of 1200cm^3 and a weight of 0.13kg. -What is the maximum mass of lead that we can put in the box without...
- Q A purple beam is hinged to a wall to hold up a blue sign. Thebeam has a mass of mb = 6.7 kg and the sign has a mass of...
- Q Two charges are placed on the x axis. One of the charges (q1 =+7.73C) is at x1 = +3.00 cm and the other (q2 = -23.7C) is at x2 =+9.00...
- Q An electric ceiling fan is rotating about a fixed axiswith an initial angular velocity magnitude of0.200 rev/s . The magnitude of the angular accelerationis 0.883 rev/s2 . Both the the angular velocity andangular accleration...
- Q Two stationary positive point charges, charge 1 of magnitude3.45nCand charge 2 of magnitude 1.80nC, are separated by a distance of 40.0cm. An electron is released from rest at the point...
- Q Please let me know about the material structure and propertiesof Solar energy devices.
- Q Two particles are fixed on an x axis. Particle 1 ofcharge 51.4 μC is located at x = -22.8 cm; particle 2 ofcharge Q is located at x = 10.8...
- Q Prove the Snell’s Law using:The fact that an homogeneous surface does not change thetransversal momentum of the wave (Photon).Maxwell’s equations.The variational principle or Fermat’s principle.
- Q Explain how an AC electric generator works and how AC power istransformed and why inside a transformer
- Q Point charges of 9.00 nC are situated at each of three cornersof a square whose side is 0.450 m .a. What is the magnitude of the resultant force on a...
- Q Discuss the basic aspects of Tight-binding approximation (whatis it, how and when this model is applicable, it's motivation, whyis it important, it's limitations)? What are the differences andsimilarities of tight-binding...
- Q Two cars collide at an intersection. Car A, with a mass of 2000kg , is going from west to east, while car B, of mass 1400 kg , isgoing from...
- Q A communications satellite is in a synchronous orbit that is3.47
- Q The speed of a projectile when it reaches its maximum height is0.56 times its speed when it is at half its maximum height. What isthe initial projection angle of the...
- Q A demonstration gyroscope wheel is constructed by removing thetire from a bicycle wheel 0.655 m in diameter, wrapping lead wirearound the rim, and taping it in place. The shaft projects...
- Q An 7.5 g ice cube at −10°C is put into a Thermos flaskcontaining 150 cm3 of water at 21°C. By how much has theentropy of the cube–water system changed when...
- Q (a) The radioisotope 40K constitutes 0.0117% of naturallyoccurring potassium and has a half life of 1.28´109 years.Calculate the activity of a 1.00 kg sample of potassium chloride(KCl). You may assume...
- Q As a red giant, the Sun’s luminosity will be about 2000 timesgreater than it is now. Calculate the surface temperature of theEarth under these conditions assuming that the Earth is...
- Q Thecat righting reflexis a cat's innate ability to orient itself as it falls in orderto land on its feet. Therighting reflex begins to appear at 3–4 weeks of age, and...
- Q Charge q1= +0.225 nC is at the origin. Charge q2 = -0.913 nC isat y= +2.44 cm. What is the magnitude and direction of theacceleration felt by an electron at...
- Q A bullet of mass m = 29 g is fired into a wooden block of mass M= 4.9 kg as shown in the figure below. The block is attached to...
- Q Please answer the following question correctly :3. Answer the following, assume we are looking down at thesolenoid:a. If the North Pole enters the solenoid first, the field linespoint (.......) thesolenoid.i....
- Q A solenoidal coil with 28 turns of wire is wound tightly aroundanother coil with 320 turns. The inner solenoid is 21.0cm long andhas a diameter of 2.20cm . At a...
- Q PLEASE ANSWER THIS QUESTION WITH THESE VALUES NOT ONE YOUANSWERED WITH DIFFERENT VALUES!!! THANKSA radio broadcast antenna is 36.00 kmfrom your house. Suppose an airplane is flying 2.200kmabove the line...
- Q Examples of 1st law thermodynamics in our daily lives
- Q A crate is given an initial speed of 2.6 m/s up the 29.0 ∘ planeshown in (Figure 1). Assume μk = 0.12.
- Q I was wondering where I can get a more or less complete set of agalaxy to test an n-body simulation (preferably two collidinggalaxies with approx 300k to 1M elements).Is it...
- Q Part A: A spherical wave with a wavelength of 4.0 m is emittedfrom the origin. At one instant of time, the phase at r = 8.0 m isπrad. At that...
- Q Kirchhoff’s Junction Rule is a consequence of the law ofConservation of Electric Charge. Explain why.
- Q Consider two vectors F1 with magnitude 44 N inclined at 61 o andF2 with magnitude 98 N inclined at 139 o , measured from thepositive x axis with counterclockwise positive.Find...
- Q A diverging lens has a focal length of -30.0cm. Located theimages for object distances of (a) 60.0cm (b) 30.0cm (c) 15.0cm.What kind of images are they (real or virtual; upright...
- Q a block of mass m=0.10 kg attached to a spring whose springconstant is k=2.5 N/m . At t=0.2s, the displacement x=-0.3m, andthe velocity v=-2.0m/sa) find the equation of displacement as...
- Q Two stationary positive point charges, charge 1 of magnitude3.10 nC and charge 2 of magnitude 1.80 nC , are separated by adistance of 42.0 cm . An electron is released...
- Q 1- What is the maximum voltage that can be applied across a2.3-kΩkΩ resistor rated at 1414 watt?Express your answer to two significant figures and include theappropriate units.2- A certain copper...
- Q A model rocket blasts off from the ground, rising straightupward with a constant acceleration that has a magnitude of 91.3m/s2 for 1.79 seconds, at which point its fuel abruptly runs...
- Q How effective would a thermonuclear device of 47 megatons orhigher like the zsar bomba be in space?Could we use as planetary defence on somthing like an asteroidas long as it...
- Q A box of mass sits on the floor of an elevator. The area of thebottom surface of the box is 0.250 m2. When the elevator is movingupward at a constant...
- Q A charge of -2.75 µC is fixed at the center of a compass. Twoadditional charges are fixed on the circle of the compass, whichhas a radius of 0.092 m. The...
- Q In two paragraphs, compare and contrast the atmospheres of theinner planets. Explain the important conditions leading to thedifferences of these atmospheres.Keep in brief and short. Thank you.
- Q A device connected in a parallel circuit will undergo a highervoltage drop compared to the same device connected in a seriescircuit. is this true or false, and also why does...
- Q 1) Picture a Styrofoam packing peanut in your hand. If you closeyour hand around it and squeeze, what are you doing to thepressure?2) How does this affect the volume of...
- Q a property company who will also operate the building isdeciding whether to build a standard efficiency office building ora high efficiency office building. The office building is 8,000 m2and its...
- Q Please Explain!Determine whether the following nuclides will undergo alpha decay a) 214Po b) 199Hg (mass=198.968262U)
- Q You are an astronaut in the space shuttle pursuing a satellitein need of repair. You are in a circular orbit of the same radiusas the satellite (420 km above the...
- Q Select the situations from the list below in which mechanicalenergy is conserved.A ball sliding down a hill with friction.The Moon orbiting the Earth.A ball sliding down a frictionless hill.A child...
- Q Assume you have a somewhat idealized J-band system with spectralresponse of 0.8 from 1.15 through 1.35 mm and zero outside thisrange.What is the effective (mean) wavelength?
- Q What are forces felt by an ion in an electric field, an electronin a wire carrying current, and a magnet (and its component parts)in a magnetic field and why are...
- Q Unit 2 Accelerations ...Compute the answers and match the following.A rock is thrown vertically into the air. At the top of itspath, its downward acceleration is ...A jumbo jet has...
- Q A cylindrical glass beaker of height 1.272 m rests on a table.The bottom half of the beaker is filled with a gas, and the tophalf is filled with liquid mercury...
- Q You are 50m away from a train and running at a constant velocityof 26m/s. The train has a constant acceleration of 39m/s2. If ittakes the train 4.92 seconds to reach...
- Q A -3.00 nC point charge is at the origin, and a second -5.50 nCpoint charge is on the x-axis at x = 0.800 m.Q1: Find the net electric force that...
- Q For those fortunate souls who do not need glasses, the lens ofthe eye adjusts its focal length in order to form a proper image onthe retina. This typically means that...
- Q Given: 2 balls collidem1= 0.126kg         m2=0.126kgBefore collision:Yx(initial)= 4.00m/s        V2x(initial)=-2.00 m/sYy(initial)= 1.50m/s         V2y(initial)= 2.00 m/sAfter collision:V1x(final)= -0.482m/s           V2x(final)= 2.482 m/sV1y(final)= 2.020m/s            V2y(final)= 1.480 m/sCalculate the x and y components of the total momentum of...
- Q Two stationary positive point charges, charge 1 of magnitude3.20nC and charge 2 of magnitude 2.00nC , are separated by adistance of 42.0cm . An electron is released from rest at...
- Q 3. Two charges with fixed positions are listed below: q1 = −4 µCat (−2 mm, 2 mm); q2 = −14 µC at (3 mm, 2 mm).(a) (5 points) Determine the...
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