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1. What is the avg total energy density in the wave given: Freq=6.15E14 hz travelling in a vacuum (c=3.0x10^8) the wave strikes a 9cm^2 surface oriented perpindicular to the wave deositing 1.35 mW of average power. The wavelength of the wave is 88 nm
2. Unpolarized light passes through two polarizers. The inensity of light coming out from the second polarizer is S2=33% of the intensity of te unpolarized light S0. What is the angle between the transmission axes of the polarizers.
A vertical scale on a spring balance reads from 0 to 175. The scale has a length of 12 from the 0 to 175 reading. A fish hanging from the bottom of the spring oscillates vertically at a frequency of 2.8.
a force of 60 N causes an object to have an acceleration equal to 4 m/s2. What is the object's mass
A research balloon bound for the stratosphere is filled at sea level with 800 m3 of helium whose initial temperature is 285 K. What is the temperature of the helium
an rc series circuit has r 71.5omega and c 580nf . the series combination is connected across a 200v rms 68hz power
What is the energy density. Find out the lowest frequency that permits standing waves in both strings with a node at the junction. The standing wave pattern in each string may have a different number of loops.
A dad pushes tangentially on a small hand-driven merry-go-round and is able to accelerate it from rest to a frequency of 16rpm in 10.0s. What force is required at the edge
q1. the rotational inertia of a collapsing spinning star changes to 45 its initial value. what is the ratio of new
Three blocks, each of mass 14.0 kg are on a frictionless table. What is the net horizontal force on block A
your eye diameter 2.5 cm is able to focus the image of a tree on your retina. the tree is 24 m tall and 85 m away. what
A force acts on a block weighing 45N. The block is initially at rest on a plane inclined at angle θ = 18.0° to the horizontal. The positive direction of x axis is up the plane.
A dentist causes the bit of a high-speed drill to accelerate from an angular speed of 1.05 x 10^4 rad/s to 3.14 x 10^4 rad/s. In the process, What is the frequency of red light with a wavelength in vacuum of 600 nm
Gold, which has a density of 19.32 g/cm3, is the most ductile metal and can be pressed into a thin leaf or drawn out into a long fiber. (a) If a sample of gold with a mass of 4.622 g, is pressed into a leaf of 3.941 µm thickness, what is the area ..
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