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A light signal is sent from the origin of a system K at t=0 to the point x=3m, y =5m, z = 10m. a) At what time t is the signal received? b) Discover (x’,y’, z’, t’) for the receipt of the signal in a frame K’ that is moving along the x axis of k at a speed of .8c. c) From your results in b) verify that the light travelled with a speed c as gauged in the K’ frame.
A laser used in cutting or drilling metals produces 10 ns pulses at 1.00 J per pulse. What is the peak power of each pulse
A sound wave travels in air with frequency 1372 Hz. (Assume the temperature of the air is 20 degrees C). If we can hear the sound at a level of 25 dB, what is its intensity? (The minimum intensity audible to humar ear is I= 1.0 x 10^-12 W/m^2). What ..
In brief explain the changes that the Sun will go through after it exhausts its core hydrogen. Be sure to describe both the changes occurring in the Sun's core and the changes visible from outside the Sun. What do we mean by the stages we call hydrog..
two stones are thrown simultaneously one straight upward from the base of a cliff and the other straight downward from
An object of mass 5kg has an initial velocity of 10m/s, if this object has moved a distance of 40m and maintains a final velocity of 20m/s. What is the external force encountered by this object
When 1250 J of heat are added to one mole ofan ideal monatomic gas, its temperature increases from 272 K to 275K. Find the work done by the gas during this process
The technique known as potassium-argon dating is used to date old lava flows and thus any fossilized skeletons found in them, What is the age of a piece of solidified lava
Suppose we allow two mass in a one-dimensional diatomic lattice to become equal. What happens to the frequency gap? Is this answer expected? Compare the results with those of the monatomic lattice.
question a ray of light in air strikes a glass plate n 1.50 at an incidence angle of 500. determine the angles of the
Two circular parallel plates having charges of equal magnitude but opposite sign are separated by 11.58cm. Each plate has a surface area of 0.0105m^2. the magnitude of the electric field between the plates is 5.185kN/C. An electron is released fro..
An osprey’s call is a distinct whistle at 2200 {rm Hz}. An osprey calls while diving at you, to drive you away from her nest. You hear the call at 2300 {rm Hz}. Explain how fast is the osprey approaching?
a beam of light is incident from air on the surface of a liquid. if the angle of incidence is 25.5deg and the angle of
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