Physics question and answers for July 21, 2023
- Q In an attempt to escape from a deserted island, a castaway builds a raft and sets sail for the sea. The wind changes a lot during the day and flies...
- Q One long wire carries current 32.0 A to the left along thex axis. A second long wire carries current 58.0 A to theright along the line (y = 0.280 m,...
- Q a steering wheel whose diameter is 2.44m has an angular velocity that decreases uniformly from 100 rpm at t = 0, until it stops when t = 4s. calculate tangential...
- Q A 8.71 kg block is sliding along a smooth surface at 11.4 m/s.It travels up a smooth ramp, and comes to a stop. How high abovethe ground is it when...
- Q Challenges in the current fiber laser technology.If you have references, please add them to your answer, manythanks!
- Q A 10 g bullet is fired with 450 m/s into a 10 kg block that sitsat rest on a wooden table 20 cm from the edge of the table. Thebullet...
- Q If there is a cavity inside a conductor with no charge in it,what is the electric field in there?What is Faraday’s ice pail experiment?What is the work principle of Van...
- Q This problem has 3 parts.A single resistor with resistance R ohms is connected to abattery.part a - If the single resistor is replaced with 2 identicalresistors each of R ohms...
- Q A sample of silicon is doped with donors to a concentration of10^20 donors m−3 . Assume all the donors are ionised and that thesample is initially at 300K. (a) What...
- Q 1. For each of the cases that follow, draw a picture of thesystem being described and list as many properties of theequilibrium state as you can, especially the constraints placed...
- 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 Calculate the magnetic field outside a straight conductor ofradius R. Include drawing, if apply.
- Q This problem has 3 parts.The power company wants to deliver electrical service of 110volts plus or minus 5 volts (105 to 115 volts), at 60 hertzfrequency across a 10 kilometer...
- Q Suppose you first walk 10.5 m in a direction 20° west of northand then 25 m in a direction 40° south of west as shown in thefigure.a. What is the...
- Q Jack and Zack are standing on a crate at rest on a frictionlesshorizontal surface. Jack has a mass of 70 kg, Zack has a mass of 45kg, and the crate...
- Q Answer Questions 2.3.2.3 Devise hypothesis to account for the following observations,and design an experiment or suggest further observations to testyour hypothesis.More automobile accidents occur at dusk than at any other...
- Q Consider a thin uniform disk of mass M and radius R. A mass m islocated along the axis of the disk at a distance z from the centerof the disk....
- Q A 70.0 kg70.0 kg ice hockey goalie, originally at rest, has a0.280 kg0.280 kg hockey puck slapped at him at a velocity of 33.5m/s.33.5 m/s. Suppose the goalie and the...
- Q a 0.6 kg ball traveling horizontally on a frictionless surfaceapproaches a wall at a speed of 20m/s perpendicularly to the walland rebounds with 70% of its initial kinetic energy. What...
- Q What are WIMPs?Very small, low-mass starsA candidate class of dark matter that only interacts with thegravitational forceStable, massive, sub-atomic particles that interact with theweak & gravitational forcesStable, massive, sub-atomic particles...
- Q At very low temperatures, the speciï¬c heats of gases can change;they get smaller, almost as if some degrees of freedom get “frozenout.†Explain, using the simple harmonic oscillator as a...
- Q Describe how a plane mirror works. Is the image you see real orvirtual and why. Does the mirror image appear closer or fartherthan the actual object. How can you prove...
- Q TRUE OR FALSE?In the One Dimensional Movement Experiment, a \"smart cart\"moves on a rail (no incline). It can move in a forward and backwarddirection. To describe and graphically interpret the...
- Q Whywe can't use classical physics in all things ?
- Q TRUE OR FALSEIn the One Dimensional Movement Experiment, a \"smart cart\"moves on a rail (no incline). It can move in a forward and backwarddirection. To describe and graphically interpret the...
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