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The magnitude of the electric field of an electromagnetic waveincreases from 315 to 935 N/C. (a) Determine thewave intensities for the two balues of the electric field.(b) What is tthe magnitude of the magnetic fieldassociated with each electric field? (c) Dterminethe wave intensity for each vaule of the magnetic field.
A lab technician uses laser light with a wavelength of 640 nm to test a diffraction grating. How many lines per millimeter does this grating have
a 1000 kg aircraft going 25 ms collides with a 1500 kg aircraft that is parked and they stick together after the
Although both stars probably formed from the same clump of gas, more massive one must have had its birth slowed so that it became a key -sequence star millions of years later than its less massive companion.
Co-60 is often used as a radiation source in medicine. It has a half-life of 5.25 years. How long, after a new sample is delivered, would the activity have decreased to about 1/3 its original value.
Like a charged rubber balloon with an even surface charge density, a charged soap bubble experiences an outward electrical force on every bit of its surface. Given the total charge Q on a bubble of radius R
A tennis ball is hit with a vertical speed of 30 m/s and a horizontal speed of 25 m/s. How long will the ball remain in the air
An object of mass 4 kg is initially at rest on a frictionless ice rink. It suddenly explodes into three pieces . One chunk of mass 1 kg slides across the ice with a velocity 1.2 ms-1 i and another chunk of mass 2kg slides across the ice with a veloci..
A 2.23-m-long rod, as measured in its rest frame, speeds by you longitudinally at 6.11 × 107 m/s. By how many millimeters do you determine the rod has contracted
Chris jumps off a bridge with a bungee cord (a heavy stretchable cord) tied around his ankle as shown in the figure . He falls for 15 before the bungee cord begins to stretch. Chris's mass is 70 kg and we assume the cord obeys Hooke's law, , with k=5..
One of the events in the Scottish Highland Games is the sheaf toss, in which a 7.92-kg bag of hay is tossed straight up into the air using a pitchfork. Using the total impulse produced by gravity, determine how long the sheaf is airborne
In an ultrahigh vacuum system (with typical pressures lower than 10?7 pascal), find the number of molecules in a volume of 1.70 m3
A coin is dropped from a hot-air balloon that is 295 m above the ground and rising at 8.5 m/s upward. Find the maximum height reached for the coin in meters
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