Physics question and answers for September 24, 2023
- Q cansomeone show the optical geometry behind the vanishing clearspheres/ jelly marbles phenomena?
- Q A uniform plank of mass M and length L leansagainst a vertical wall. The initial angle it makes with thehorizontal ground is 60º. It is let go from rest and...
- Q A heat engine uses a heat source at 580 ∘C and has an ideal(Carnot) efficiency of 29 % .To increase the ideal efficiency to 46 % , what must be...
- Q Is work done when dragging a mass up a hill the same as thechange in potential energy?Is work the same as energy? I am confused as to why
- Q What is the Schrödinger equation and its applications and howit is deduced and what is boundary conditions I have studied a lotand did not understand from the professor at theUniversityplease...
- Q The pV diagram in (Figure 1) shows a cycle of a heat engine thatuses 0.250 mole of an ideal gas having γ=1.10. The curved part abof the cycle is adiabatic....
- Q What is the effective dose from 0.050 Ci of 21084Pothat is ingested that is ingested by a 70 kg person? Assume anexposure time of 24 hours. 21084Po decays to the...
- Q A chunk of brass with mass 0.6 kg, with specific heat 380 J/(kg·K), and with temperature 400 K is placed in 0.6 kg of water, withspecific heat 4186 J/(kg· K),...
- Q Two point charges are placed on the x axis as follows:Charge q1 = 4.00nC is located at x = 0.200m , andcharge q2 = 5.00nC is at x=?0.300m. What are...
- Q Find the moment of inertia of a circular disk of radius R andmass M that rotates on an axis passing through its center. [Answer:½ MR2]Step 1: Pictorial representation: Sketch a...
- Q Why hʋ is greater than energy gap in some material and µeusually greater than µh (µe is electron mobility , µh mobility ofholes)?
- Q True or False. Please explain answer.a) In the absence of net external force, the center of mass of asystem remains at a fixed location.b) Total mechanical energy can be a...
- Q Answer True or False for each question. For the threequestions indicated also provide a full explanation; this is likelyto take at least two sentences.5) It will be possible to measure...
- 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 3.10 Show that the minimum cation-to-anion radius ratio for acoordination number of 4 is 0.225.3.12 On the basis of ionic charge and ionic radii, predict crystalstructures for the following materials:...
- Q An airplane propeller starts from rest and 2 seconds later itis rotating with an angular speed of 350 rev/min. If the angularacceleration is constant, calculate(a) Itsangularacceleration.(b)Howmanyrevolutionsdidthepropellerundergoduringthistime?
- Q A wheel is rotating about an axis that is in the z-direction.The angular velocity ωz is -6.00 rad/s at t = 0, increases linearlywith time, and is +4.00 rad/s at...
- Q A muon is created 50 km above the surface of the earth. In theearth's frame, the muon is traveling directly downward at0.9999c.Part AIn the earth's frame of reference, how much...
- Q A landing craft with mass 1.22×104 kg is in a circular orbit adistance 5.70×105 m above the surface of a planet. The period ofthe orbit is 5600 s . The...
- Q Agree that the derivative of entropy w/r to P at constant T isthe negative of the product of volume and coefficient of thermalexpansion? And that therefore deltaS is negligible for...
- Q A shot putter projected a shot at the angle of 28 degrees at avelocity of 47 fps. The shot was released from 7 ft from theground.a. Compute the velocity in...
- Q Jupiter's moon Io has active volcanoes (in fact, it is the mostvolcanically active body in the solar system) that eject materialas high as 500 km (or even higher) above the...
- Q Awheels starts from rest and speeds up to 1500 rpm in 120 s. a) Findthe angular acceleration of the wheel assumed constant. b) Find thenumber revolutions it makes during this...
- Q 1.) A box made of wood is sitting on a wooden floor. The box andcontents has mass 40kg. The coefficient of static friction is 0.50and kinetic friction is 0.30. A...
- Q Write brief but complete answers to the following questionsa) Write Schrodinger's time-independent,1-D equationb) What does this equation represent?c) What requirements must the wave equation satisfy?d) What are the conditions for...
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