Physics question and answers for August 09, 2023
- Q A pendulum consists of a stone with mass m swinging on a stringof length L and negligible mass. The stone has a speed ofv0 when it passes its lowest point....
- Q at what time stampwhere does the repeat of the exposition start in therecording of beethoven sympothy 5
- Q A solid steel sphere of radius 1.50cm and density of 8045 kg/m³was launched on a horizontal frictionless surface. The sphere waslaunched using a spring gun which possessed a spring with...
- Q When two waves in the same medium hit each other, the resultingdisplacement of the medium isA. Either larger or smaller than the displacement of eitherwave acting alone, depending on the...
- Q A 2.0 mm -diameter, 50 cm -long copper wire carries a 4.5 Acurrent. What is the potential difference between the ends of thewire?
- Q For astronomy class, please answer this question comprehensivelythank you.We have detected a sudden minor increase in the solar wind fromthe Sun. The density and speed of material headed towards Earth...
- Q A ball of mass 8.1 g with a speed of 22.6 m/s strikes a wall atan angle 11.0o and then rebounds with the same speed and angle. Itis in contact...
- Q A capacitor is connected to an ac generator that has a frequencyof 3.2 kHz and produces a rms voltage of 1.3 V. The rms current inthe capacitor is 29 mA....
- Q Q. 1: (a) Write down de Broglie’s formula in terms of KineticEnergy Ek of the particle involved.(b) Calculate the electron’s and proton’s de Broglie wavelengthswhen each of them has kinetic...
- Q 1) What do you understand by change in the direction and changein the speed of a body?2) What is the difference between instantaneous and averagespeed?3) What differences do you find...
- Q What is the difference between work function and electronaffinity energy? Is there any relation between work function andelectron affinity energy?
- Q A worker is trying to push a crate across the floor in therightward direction with a horizontal force of 15N. The crate doesnot move. The mass of the crate is...
- Q 1) A projectile has the least speed at what point in itspath?a) At its maximum height.b) Just before it hits the ground.c) Just after it's fired.d) After three seconds of...
- Q Consider a charged disk of radius R on the x-zplane with its centre at the origin. The disk has a positive chargedensity σ. (a) Find, from first principles, an expressionfor...
- Q In class, we showed the equation for electroosmotic mobility andelectrophoretic mobility. Using these two equations, derive theequation for vtotal and tm. Recall theequation for vep = µeE and veo =µeoE
- Q Q = Make quark model for spin 0 meson.attempt only if you are sure, i will downvote wrong or guessedanswer.
- Q A certain spring is compressed 0.2 metres from its naturallength by a force of 0.02 newtons. A 0.1 kilogram mass is attachedto this spring. There is no damping, and the...
- Q A ball is attached to one end of a wire, the other end beingfastened to the ceiling. The wire is held horizontal, and the ballis released from rest (see the...
- Q In the figure particle 1 of charge +q and particle 2 ofcharge +4q are held at separation L = 8.38 cm onan x axis. If particle 3 of charge q3is...
- Q Formulate the Second Law of thermodynamics and explainwhy the simple example of a kitchen refrigerator does not violateit.
- Q a) Interaction between particles is described by exchange ofvirtual bosons. The range of interaction is inversely proportionalto the rest mass of these exchange bosons. Explain using diagramswhy the force responsible...
- Q There are three ways that radiating light can interact with matter. (a)List those processes and Illustrate each processes using simple two level system. (b) which one is the basis of lasing? (c) In that (lasing) process, explain why emitted photon has the same phase, polarization and direction as the exciting photon.
- Q The absolute zero temperature is equal to 0 k or -273.15. Why wecannot create objects with even lower temperature than 0k? Why theabsolute zero temperature exists? What happens ( on...
- Q A 600 kg elevator accelerates upward from rest for 10 secondsthrough 40.0 m. Find the cable tension.a) 5130 Nb) 5400 Nc) 6360 Nd) 6630 N
- Q A person pushes a 500kg crate with a force of 700 N across aconcrete floor. Given the coefficicent of kinetic friction is 0.100what is the acceleration of the crate across...
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