Physics question and answers for July 19, 2023
- Q What characteristics should a medium in which we immerse an object and make it transparent (or invisible) to you? Explain and give at least one example.
- Q Two identical balls, Ball A and Ball B are thrown verticallyupward. Ball A is thrown with an initial speed ofv, and Ball B is thrown with an initialspeed of 2v....
- Q Density is a physical property which plays a veryimportant role in our daily life. It is very widely used in allfield of engineering. Density is widely used for choosing thesuitability...
- Q Density is a physical property which plays a veryimportant role in our daily life. It is very widely used in allfield of engineering. Density is widely used for choosing thesuitability...
- Q The two wires carry currents of I = 5.24 A in opposite directionsand are separated by a distance of d0 = 8.93 cm.Calculate the net magnetic field at a point...
- Q A wave of water behaves like a plane wave with a frequency of 12Hz breaks as it passes a sharp barrier between deep and shallowwater. The velocity of the wave's...
- Q 3.12. A rectangular coil of wire is suspended in a uniformradial magnetic field of induction 0.05 T, the field lines beinghorizontal. The coil consists of 400 turns of wire each...
- Q A space station in the shape of a uniform disk (mass 8.44x105kg, radius 687 m) rotates with period 86.3 seconds. There are also781 astronauts (whom you can treat as point...
- Q Why does a baseball catcher's mitt have more padding than aconventional glove?
- Q 6. Mike Faraday folds 4 meters of copper wire (cross-section10-7 m2) into a square and holds it in a uniform magnetic field ofstrength 2.0 Tesla. The field passes directly through...
- Q Li2+ ion consists of a point-like nucleus of charge +3e and asingle electron whose average distance from the nucleus is 5 Ì10-11 m. The electron kinetic energy is, on average,...
- Q During a Tatooine speeder race, Dannik Jerriko starts from restand accelerates constantly for a time T, reaching a speed of 50m/s. He then gives his engine to Garindan to use...
- Q Accelerated electron beams are often used to study features ofatoms on the surfaces of materials. If you wanted to alter thedesign of an electron accelerator to produce an electron beamappropriate...
- Q a car starts from rest and accelerates at 3m/s2 untilit hits 30m/s and then coasts at this constant velocity. How muchtime does it take to complete a 450m trip?cansomeone help...
- Q 1. A particle undergoing circular motion in the xy-plane stopson the negative x-axis. Which ofthe following does not describe the angular position?a) 4π radiansb) π radiansc) 5π radiansd) 3π radians2....
- Q A charge of 7.00 μC is placed at each corner of an equilateraltriangle 0.090 m on each side. Determine the magnitude anddirection of the net force on one of the...
- Q A 10-cm-long thin glass rod uniformly charged to 10.0 nC and a10-cm-long thin plastic rod uniformly charged to - 10.0 nC areplaced side by side, 3.90 cm apart. What are...
- Q A mass ??? rests on a smooth horizontal table and isattached by two inelastic strings to masses ?1?? and ?2?? with (?1> ?2) which is hung over 2 smooth pulley...
- Q Explore the Balmer series of atomic transitions for ahydrogen atom. Assume the shortest wavelength possible occurs whenthe atom is ionized or when n = ∞ . What is the longest...
- Q The simplest model of a polymer involves a sequence of bonds offixed length λ, where each bond can make any angle with theprevious bond. This is called the freely-jointed chain...
- Q Design a structure using primitive material so that 1000W storefire can keep the internal temperature to at least 17°C W/a -40°Coutside temperature, of at least 1000ft^2 floor area?
- Q Your friend claims he can throw a baseball straight up with aspeed of 80 mi/h. You do notbelieve him, so you design an experiment that will enable you tocalculate the...
- Q (a) (15 pts) A net force is applied to a mass m that isinitially at rest on a level frictionless surface. The force varieswith position and is given by F(x)=Ax3/2....
- Q Laser light of some wavelength λ1 shines on a diffractiongrating with 285 lines/mm at normal incidence, producing a patternof maxima on a large screen 1.50 m from the grating. The...
- Q MA ball explodes into three pieces. Two pieces of equal massfly off to the north and to the east with a speed of 28 m/s each.Find the velocity of the...
- Q A Boeing 747 \"Jumbo Jet\" has a length of 64.4 m. The runway onwhich the plane lands intersects another runway. The width of theintersection is 23.6 m. The plane decelerates...
- Q In a high-energy collision between a cosmic-ray particle and aparticle near the top of Earth's atmosphere, 104 km above sealevel, a pion is created.The pion has a total energy E...
- Q a 4.2 g coin sliding to the right at 21.4 cm/s makesan elastic head-on collision with a 12.6g coin that is initially atrest. after the collision, the 4.2g coin moves...
- Q A person hears a siren as a fire truck approaches and passes by.The frequency varies from 480Hz on approach to 400Hz going away.What is the speed of the truck if...
- Q A \"pulse oximeter\" operates by using light and a photocell tomeasure oxygen saturation in arterial blood. The transmission oflight energy as it passes through a solution of light-absorbingmolecules is described...
- Q Ernest Rutherford (the first New Zealander to be awarded theNobel Prize in Chemistry) demonstrated that nuclei were very smalland dense by scattering helium-4 nuclei (4He) fromgold-197 nuclei (197Au). The energy...
- Q Two polarizing sheets have their transmission axes crossed sothat no light gets through. A third sheet is inserted between thefirst two so that its transmission axis makes an angle ?with...
- Q A180 g mass attached to a horizontal spring oscillates at afrequency of 2.80 Hz. At t = 0 s, the mass is at x=7.00 cm and hasvx= -29.0 cm/s. Determine:...
- Q A hydrogen discharge tube is used to illuminate a 10,000-line/cmdiffraction grating. The grating produces ï¬rst-order maxima at24.2â—¦, 25.7â—¦, 29.1â—¦, and 41.0â—¦. a) Calculate the wavelengthcorresponding to each angle. b) Determine...
- Q You just got a new job at Six Flags to test roller coasters. Thefirst roller coaster you test has a vertical circular loop with adiameter of 25 m. The empty...
- Q A curious person decides to do an experiment in their apartmentbuilding. They take their bathroom scale into the elevator on the15th floor of the highrise they live in. When the...
- Q Suppose a simple dye molecule can be modeled as having ahydrogen-like energy states with 6 electrons. Initially, theelectrons settle to the lowest total energy state. Imagine that weilluminate this molecule...
- Q A circuit is constructed with four resistors, one inductor, onebattery and a switch as shown. The values for the resistors are:R1 = R2 = 56 Ω, R3 = 45 Ω...
- Q Four ideal linear polarizers are placed in a row withthe polarizing axes vertical, 200 to vertical, 550 to vertical and900 to vertical. Natural light of intensity I0 is incident on...
- Q For the circuit shown in the figure, calculate the following.(Assume  = 7.32 V and R = 5.70 Ω.)A rectangular circuit begins at point a on its leftside. On its top side,...
- Q Let’s design a velocity selector device for a mass spectrometer.a.Illustrate the device and explain how it works. b.The electricfield inside the device will operate at a level of 12.0E3 V/m....
- Q Boxcar #1 has a mass of 2000 kg. Boxcar #2 has a mass of 1200kg. Boxcar #1 is moving at 12.00 m/s to the right before they hitand stick together....
- Q Early 20th-century physicist Niels Bohr modeled the hydrogenatom as an electron orbiting a proton in one or anotherwell-defined circular orbit. When the electron followed itssmallest possible orbit, the atom was...
- Q A space station in the shape of a uniform disk (mass 4.45x105kg, radius 262 m) rotates with period 86.1 seconds. There are also734 astronauts (whom you can treat as point...
- Q . Inside of a calorimeter (insulated container) is placed 200gof water at 20°C. The lid of the calorimeter is briefly lifted and50g of lead is added initially at 200°C. What...
- Q Construct the geometric bucklings and critical flux profiles infinite cylinder reactor.
- Q A gear has an angular velocity equal to 20 rad/s initially, butit speeds up to 40 rad/s in 5.0 seconds, while experiencing angularacceleration that is constant. Compute the number of...
- Q 1.) Two charges, q1 = -16.5 μC and q2 =13.5 μC , are located at (x,y) = (12.4, 21.2) cm and (19.6, 24.0)cm respectively. Find the electrostatic force between these...
- Q A space station has an interior volume of 50m ^ 3 andat 25 °C it maintains an atmosphere of 10 ^ 5 Pa, which can beconsidered an ideal gas. If...
- Q Consider the equation of Liouville.a) Write the equation and explain its meaning withwords, make sure all the variables and symbols are welldefined.b) Say what results are important for the validity...
- Q 1.A bullet with a mass of 45 g is fired into a 8.3-kg block ofwood resting on a floor against a spring. This ideal spring(k = 76 N/m) has a...
- Q A farsighted woman breaks her current eyeglasses and is using anold pair whose refractive power is 1.785 diopters. Since theseeyeglasses do not completely correct her vision, she must hold anewspaper...
- Q Show that the normalization of wave function does not changewith time, using time dependent Schroedinger equation.Calculate the rate of change of x using Schroedinger'sequation.
- Q Answer these two to the fullest:1. Explain magnetic inductance and give examples in dailylife.2. In your own words, explain Faraday's Law and give examplesin daily life.
- Q Asume the wave function Ψ(x) = A/(x²+a²) whith x real,A and a constantsa) find the normalized wave function Φ(p) un themomentum space associated to Ψ(x)b) use Φ(p) yo compute the...
- Q 4 charges are fixed to the corners of a square of side .53 cm.Charge 1 of -1 uC is fixed to the top left corner. Charge 2 of -2uCis fixed...
- Q One positive and one negative charges identical in magnitude areplace near each other. At halfway between the two charges...the electric field is zero and the potential is zero.the electric filed...
- Q 2) A racecar is driving at 40 m/s when a rabbit 100 m away runsacross the track. It takes 0.8 seconds for the driving to slam onhis breaks. If the...
- Q A block with mass m1 = 8.9 kg is on an incline withan angle θ = 31° with respect to the horizontal. For the firstquestion there is no friction between...
- Q A long isolating cylinder with radius R and a charge densityÏ(s) = 3λ Ï€R3 (R − s) for s ≤ R , 0   for s > R,where λ is a...
- Q A group of particles is traveling in a magnetic field of unknownmagnitude and direction. You observe that a proton moving at 1.60km/s in the +x-direction experiences a force of 2.10×10−16...
- Q A conducting rectangular loop of mass, M, resistance R, anddimensions w x l falls from rest into a magnetic field B. Duringthe time interval before the top edge of the...
- Q I ask that you complete a project consisting of the following:(2) a 2 or 3 dimensional physical model of an inclined plane (ramp)including force vectors of the given problem. (1)...
- Q A diverging lens of focal length 15 cm forms an image of objectplaced at 30 cm from the lens.The magnification of the lens is:
- Q A capacitor of unknown capacitance C is charged to 130 V andconnected across an initially uncharged 75 uF capacitor. if thefinal potential difference across the 75 uF capacitor is 47...
- Q A toy cannon uses a spring to project a 5.20-g soft rubber ball.The spring is originally compressed by 5.03 cm and has a forceconstant of 8.08 N/m. When the cannon...
- Q Apickup truck with mass 2so kgs traveling weha speed of 26mwhileacompact car of mass 2n kg is traveling in the oppositedinection weh the same speed The mack and car undergo...
- Q discuss the posyive and neagtive impwct of the usage of smartphoneon society at large .please give examples
- Q Examples for each of those would be greatly appreciated,thank you!How do heat engines work?What does a coefficient of performance mean for the engine andthe different types of efficiencies?What does it...
- Q Two speakers are located at two neighboring corners of a squareof side length 10.00 m. A listener walks from another corner of thesquare along the side toward the speaker next...
- Q 1) if the angle of incidence is greater than the angle ofrefraction for a light ray, is the speed of light faster in asecond material? explain your answer2) a student...
- Q 1: State how many significant figures there arein each of the following calculations, and indicate which is thelimiting value:Part (a)(18.7)2:1- 1 (limited by 2)2-4 (limited by 18.73- 2 (limited by...
- Q When the rocket is on earth and lifting off and burning fuel,which of the following is or are conserved? Mark all that apply andprovide a brief 1-2 sentence justification of...
- Q For the vectors  = (2.2 m) + (4.3 m), and  =(5.5 m) - (2.9 m), give the x and y components,magnitudes, and directions of the following vector operations.(a)  +______ (x component)______ (y component)______...
- Q A convex spherical mirror has a radius of curvature of9.60 cm.A) Calculate the location of the image formed by an 7.65-mm-tallobject whose distance from the mirror is 18.0 cm. Answer...
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