Physics question and answers for September 13, 2023
- Q Select the following correct MC answer for the questionspertaining to the Photoelectric Experiment1. The quantized nature of photon energy is confirmed by thephotoelectric effect sinceSelect one:a. only the right number...
- Q Diffraction grating produces its third-order brightband at an angle of 79.4 ∘ for light of wavelength791 nm .Part AFind the number of slits per centimeter for thegrating.n = Part BFind the angular location of the first-order...
- Q A stone with a weight of 5.25 N is launched vertically fromground level with an initial speed of 19.0 m/s, and the air drag onit is 0.261 N throughout the...
- Q A copper block is removed from a 299
- Q A roller coaster car has a mass of 250 Kg. The car is towed tothe top of a 30 m hill where it is released from rest and allowedto roll.  ...
- Q The Mars Reconnaissance Orbiter (launched on 8/12/2005) achieveda nearly circular orbit in September 2006 with a period of T = 6.72x 103 s. The mass, M, of Mars is 6.417...
- Q A particle of mass 0.350 kg is attached to the 100-cm mark of ameterstick of mass 0.150 kg. The meterstick rotates on the surfaceof a frictionless, horizontal table with an...
- Q Two long straight parallel wires are 11 cm apart. Wire A carries2.0-A current. Wire B's current is 5.0 A in the same direction.Determine the magnetic field magnitude due to wire...
- Q 3) The very first magnetic resonance imaging (MRI) devicesemployed multi-layer copper solenoids, like the one shown in thefigure below. The solenoid dimensions were: length = 2 m and innerradius =...
- Q This year, three scientists won the Nobel Prize in Physics. Givea brief summary of their research and provide examples of commonapplications of their work.
- Q A sinusoidal wave is traveling on a string with speed 34.9 cm/s.The displacement of the particles of the string at x = 5.9cm is found to vary with time according...
- Q Consider a beam of white lightstriking a face of an equilateral prism at an incident angle ofTheta(1)= 50
- Q IP A charge of 18.0 μCμC is held fixed at theorigin.Part A:If a -7.00 μCμC charge with a mass of 3.40 gg is released fromrest at the position (0.925 mm,...
- Q In a Young's double-slit experiment, two parallel slits with aslit separation of 0.135 mm are illuminated by light of wavelength579 nm, and the interference pattern is observed on a screenlocated...
- Q a)An infinite (very large) charged plate with charge density σis parallel to the xz plane and passes through the point (0, 5, 0).Calculate the electric field of the plate.For points...
- Q Kinetic friction is a constant-value force, while staticfriction changed in response to other forces, up to somemaximum.  Why is this the case? What if static frictionbehaved more like kinetic friction, with...
- Q A concave mirror has a focal length of 63.6 cm.(a) What is its radius of curvature?__________ cm(b) Locate the image when the object distance is 100 cm. (Indicatethe side of...
- Q How far would you have to drill into the Earth, to reach a pointwhere your weight is reduced by 7.5%? Approximate the Earth as a uniform sphere.
- Q An astronaut wants to determine the mass of objects she finds inspace. On Earth she chooses a spring and attaches a rock to it thatweighs 20 N. After placing the...
- Q Astronomy:6.What is a brown dwarf? Is it different from a proto-star?How?7. What different types of gas do astronomers find in theinterstellar medium?8. Astronomers believe the Sun formed with other stars...
- Q An AM radio station has a frequency of 1000 kHz; it uses twoidentical antennas at thesame elevation, 150 m apart.a) In what direction is the intensity maximum, consideringpoints in a...
- Q 77 kW is to arrive at a town over two 0.140 ? lines. Estimatehow much power is saved if the voltage is stepped up from 240 V to2400 V and...
- Q For each answer, please briefly explain the reasoningbehind the answer.1. True or False: For heat pumps, wcycle, irreversible >wcycle, reversible2. True or False: All pure substances must have S =...
- Q An infinitely long line of charge has a linear charge density of5.50×10−12 C/m . A proton is at distance 15.0 cm fromthe line and is moving directly toward the line...
- Q A)Describe what you think will happen if two cars of equal masscollide with each other but do not stick together. What roles dotheir respective speeds play in your response? Does...
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