Physics question and answers for September 11, 2023
- Q How to adaptation (response of rods and cones to changing lightconditions) to a equivalent function in a camera
- Q A man holding a rock sits on a sled that is sliding across afrozen lake (negligible friction) with a speed of 0.490 m/s. Thetotal mass of the sled, man, and...
- Q dSince the spokes of a bicycle wheelhave much less mass than the rim, the wheel can be modeled as acylindrical hoop ofmass 1.90 kg and radius 0.6 m. This wheel...
- Q CALC- A web page designer creates an animation in which a dot ona computer screen has position r=[4 cm + (2.5cm/s^2)t^2] i+(5.0 cm/s)t ja) find the magnitude and direction of...
- Q A 0.0147-kg bullet is fired straight up at a falling woodenblock that has a mass of 2.94 kg. The bullet has a speed of 760 m/swhen it strikes the block....
- Q The figure below gives the speed v versus timet for a 0.490 kg object of radius 6.50 cm that rollssmoothly down a 30
- Q A long, straight wire carries a current of 20.0 A, as shown inFigure 27-63. A rectangular coil that has two sides parallel to thestraight wire has sides that are 5.00...
- Q An object is located 1.5 m  from a 6.5-D lens. a) By how muchdoes the image move if the object is moved 0.9 m closer to thelens? Follow the sign...
- Q An optical system consists of two thin lenses: +100. mm and-20.0 mm. They are separated by a distance of 50.0 mm. An object isplaced 50.0 mm in front of the...
- Q What makes other planetary systems different from one another,for example, the Earth is not the same as Venus or Mars? In thenext couple of years, we will be sending people...
- Q A line of charge is bent into a square with a side of 2 cm and acharge density of 3 microC/cm. Using Coulomb's law, determine theelectric field at all points...
- Q A uniform electric field with a magnitude of 6 × 10^6 N/C isapplied to a cube of edge length 0.1 m as seen in Fig 22-2 above.If the direction of...
- Q The pilot of an airplane executes a loop-the-loop maneuver in avertical circle. The speed of the airplane is 305 mi/h, at the topof the loop and 450 mi/h at the...
- Q It costs $180 to heat a house with electricity in a typicalwinter month. (Electric heat simply converts all the incomingelectrical energy to heat.)Part AWhat would the monthly heating bill be...
- Q An insulated beaker with negligible mass contains liquid waterwith a mass of 0.250 kg and a temperature of 62.0 ∘C .How much ice at a temperature of -25.0 ∘C must...
- Q 1a.Summarize what Asteroid and Comet isb. Do people think an Asteroid or CometImpact can be stop? Explain whyc. Do people think an Asteroid or CometImpact can notbe stop? Explain whyd....
- Q A 62-kg bicyclist rides his 10.3-kg bicycle with a speed of 13.5m/s. Assuming contant acceleration, (a) How much work must be doneby the brakes to bring the bike and rider...
- Q A thin uniform rod (mass = 0.420 kg) swings about an axis thatpasses through one end of the rod and is perpendicular to the planeof the swing. The rod swings...
- Q 13. When a single charge q is placed on one corner of a square,the electric field at the center of the square is F/q. If threeother equal charges are placed...
- Q It appears the most of the matter in the Universe isnon-luminous, IE not part of stars.a) Describe the experimental evidence for the existence of thisdark matter.b) What is this dark...
- Q Power is generated at 24 kV at a generating plant located 55kmfrom a town that requires 60MW of power at 12 kV. Two transmissionlines from the plant to the town...
- Q A water balloon is observed to emerge from an open window of agymnasium. The window is 9.5 m above the ground. Through miraclesof technology (involving doppler radar and automated videoanalysis),...
- Q An object is launched from 2.3 meters above the ground with a 60degree angle with the horizontal the ball collides with the earthat a distance of 20.5 metersA) Calculate the...
- Q The pressure inside a commercial airliner is maintained at 1ATM(1.01x105 N/m2). What is the outward forceexerted on a 1mx2m cabin door if the outside pressure (at 10kmhigh) is .3 ATM?
- Q Derive aformula for the input impedance of a terminated losslesstransmission line.
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