Physics Waves And Oscillations Level: Misc Level
The intensity level of sound 20 m from a jet airliner is 10 dB. At what distance from the airplane will the sound intensity level be at a tolerable level of 100 dB? ( assume spherical spreading of sound)
Physics Work,Power & Energy Level: Misc Level
A 3.0 -kg stone is dropped from a height of 100 m. Find its kinetic and potential energies when it is 50 m from the ground.
Physics Force & Laws Of Motion Level: Misc Level
A driver sees a cow in the road ahead and applies the brakes so hard that they lock and the car skids to a stop in 24 m. If the road is concrete and it is dry day, what was the car's speed in kilometers per hour when the brakes were applied?
Physics Kinematics Level: Misc Level
A sprinter accelerates from rest until he reaches a velocity of 12.0 m/s and then continues running at this velocity. If he takes 11.0 s to cover 100 m, what was his acceleration and how long did it last?
Physics Modern Physics Level: Misc Level
How much energy is deposited in the body of a 65 kg adult exposed to a 2.0 Gy dose?
Physics Modern Physics Level: Misc Level
How many fissions take place per second in a 200 MW reactor? Assume 200 MeV is released per fission.
Physics Modern Physics Level: Misc Level
What fraction of a sample is left after exactly 5 half - lives?
Physics Modern Physics Level: Misc Level
What is the maximum kinetic energy of an electron emitted in the B-1 emission?
Physics Modern Physics Level: Misc Level
What is the approximate radius of an alpha particle ( 4 2 He)?
Physics Ray Optics Level: Misc Level
The overall magnification of astronomical telescope is desired to be 24 x. If an objective of 75 cm focal length is used, what must be the focal length of the eyepiece?
Physics Ray Optics Level: Misc Level
An 8 cm focal length converging lens, which is a magnifying glass, what is the magnification if the eye is focused at its near point N= 27 cm?
Physics Electromagnetic Waves Level: Misc Level
A. 3400 line / cm grating produces a third order fring at a 28.0 degrees. What wavelength of is being used?
Physics Ray Optics Level: Misc Level
What is Brewsters angle for an air glass (n =1.62 ) surface?
Physics Electromagnetic Waves Level: Misc Level
Light of wavelenth 730 nm passess through a slit of 1.0 x 10 -3 mm wide. How wide is the central maximum in degrees?
Physics Ray Optics Level: Misc Level
A convex meniscus lens is made from glass with n =1.50. The radius of curvature of the convex surface 22.2 cm ahd that of the concave surface is 45.2 cm. What is the focal length?
