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A penguin waddles along the central axis of a concave mirror, from the focal point to an effectively infinite distance.(a) How does its image move?(b) Does the height of its image increase continuously, decrease continuously, or change in some more complicated manner?
What is the kinetic energy of an electron having a rest mass of 9.1 x 10^-31 kg traveling at 65% speed of light?
Ultraviolet light of wavelength 350 nm and intensity 1.00 W/m2
is directed at a potassium
surface. (a) Find the maximum KE of the photoelectrons. (b) If 0.50 percent of the incident
photons produce photoelectrons, how many are emitted per second if the potassium surface
has an area of 1.5 cm2
?
What is the maximum wavelength of light that will cause photo electrons to be emitted
from sodium? What will the maximum kinetic energy of the photo electrons be if 200-nm
light falls on a sodium surface?
a man 1.30 m tall stands 5.20 m from a concave mirror. if the image could be formed on a screen 15, what is the size of the images?
A block of ice weighs 950 N and was placed on a metal surface that has a coefficient of friction of μ = 0.12. How much friction is present? *
Two rugby players run towards each other and have an inelastic collision. Given the mass 70 kg and 60 kg respectively, and velocity 3 ms-1 and 4 ms-1. Calculate the final velocity and its direction of the respective players. Discuss how a rugby player’s bone develops if continuously performing the weight bearing exercise using Wolff’s Law and bone remodeling theory
What is the size in square millimeter (mm2 ) is the cable 250 MCM size?
Calculate the power developed to lift a 8 kg mass to a height 2.4 meters in 6 seconds.
A student is only able to read the lecture notebook when it is held at 65.00cm from his eyes. What focal length and power must the lenses of his reading glasses have to bring his near point to the normal value
