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Completely polarized light is passed through a polarizing sheet.
The light that passes though has an intensity of 50% of the incident beam. The angle between the direction of the polarization of the incident beam and the direction of the polarization of the sheet must be what?
An astronaut at rest on Earth has a heartbeat rate of 70 beats/minute. Find what will this rate be when she is traveling in a spaceship at 0.90c as measured by an observer also in the ship
A 60.0- and a 60.0- resistor are connected in parallel. When this combination is connected across a battery, Determine the internal resistance of the battery
What is the wavelength of a typical T-wave whose frequency is 7 Hz? (The speed of sound in seawater is 1530 m/s.)
A 330 g air track cart on a horizontal air track is attatched to a string that goes over a pulley with a moment of inertia of 5.00*10^-6 kg*m^2 and a radius of 1.35 cm. Find the acceleration of the cart and the hanging mass
A parallel plate capacitor has plates that are 2.25 mm apart. What is the capacitance of this capacitor
The earth orbits the sun once a year (3.16X 107s) in a nearly circular orbit of radius 1.50X1011m. With respect to the sun, determine the tangential speed of the earth
A solar cell generates a potential difference of 0.95 V when a 380 ? external resistance is connected across it, What is the internal resistance of the solar cell
The 20-g centrifuge at NASA's Ames Research Center in Mountain View, Determine the rotation rate, in revolutions per second, required to give the astronaut a centripetal acceleration of 19.8g
A horizontal platform the shape of a circular disk rotates in a horizontal plane about a frictionless vertical axis by an initial angular speed ?A dog (mass m) is initially riding the merry-go-round at its rim, however then slowly walks toward the ce..
Assume that a parallel-plate capacitor has circular plates with radius R = 29 mm and a plate separation of 7.0 mm. Assume also that a sinusoidal potential difference with a maximum value of150 V and a frequency of 58 Hz is applied across the plates; ..
An earthquake generates three kinds of waves: surface waves (L waves), which are the slowest and weakest; shear (S) waves, which are transverse waves and carry most of the energy; and pressure (P) waves, which are longitudinal waves and travel the..
for a projectile launched horizontally which of the following best describes the vertical component of a projectiles
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