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(a) A Plano-convex lens is made of glass (n=1.5) with one surface flat and the other having a radius of 20 centimeter. Determine what is the focal length of the lens?
(b) A sodium surface is bombarded by photons that have a wavelength of 200 nm. Compute the energy of the photons. (h=6.62x10-34J.s, 1eV = 1.602x10-19 J, c =3x108)
A current of 74.8 mA exists in a metal wire, In what direction do the electrons travel with respect to the current
One mole of an ideal gas initially at a temperature of Ti = 6.8°C undergoes an expansion at a constant pressure of 1.00 atm to seven times its original volume. Calculate the new temperature Tf of the gas
An armadillo and Earth attract each other gravitationally. Which experiences the greater gravitational force, or do they experience the same force magnitude?
A bungee jumper with mass 52.0 kg reaches a speed of 13.5 m/s moving straight down when the elastic cord tied to her feet starts pulling her back up. find the average force that the bungee cord exerts on the jumper
a helium neon laser emits light that has a wavelength of 632.8 nm. the circular aperature through which the beam
A student presses a book between his hands, as the drawingindicates. The forces that he exerts on the front and back coversof the book are perpendicular to the book and are horizontal. Thebook weighs 28 N.
A sinusoidal electromagnetic wave having a magnetic field of amplitude 1.30?T and a wavelength of 434nm is traveling in the +xdirection, What is the amplitude of the associated electric field
A shell is launched at 140m/s 56.0 degrees above the horizontal. find the maximum height about the ground that the projectile reaches
A nuclear power plant generates 3000 MW of energy from nuclear reactions in reactor's core. What is the plant's actual efficiency
A hollow, spherical shell with mass 1.90kg rolls without slipping down a slope angled at 40.0 degree. Part A Find the acceleration. Take the free fall acceleration to be g = 9.80m/s^2 Part B Find the friction force. Take the free fall acceleration to..
A certain current on passing through a galvanometer produces a deflection of 100 divisions. The galvanometer resistance would be
Water flows straight down from an open faucet. The cross-sectional area of the faucet is 1.7 × 10-4m2, find the cross-sectional area of the water stream at a point 0.11 m below the faucet
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