Jupiter is considered a near Earth object
Indicate whether the statement is true or false
False
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A semiconductor with an electrical conductivity of 300 (?·m)-1 at room temperature is produced by doping Group IV silicon with Group V antimony. Assume that the mobility of electrons in silicon is equal to 0.10 m2 /V·s and that the mobility of holes is equal to 0.001 m2 /V·s. You can assume that this semiconductor is in the extrinsic range of operation at this temperature.
(a) What type of semiconductor is this? (b) What doping concentration of antimony in atoms/m3 is necessary for this electrical conductivity? (c) State clearly any assumptions you make in this calculation.
In a double-slit experiment, the distance between the slits is 0.2 mm and the distance to the screen is 150 cm. What is the phase difference (in degrees) between the waves from the two slits arriving at a point P when the angular distance of P is 10° relative to the central peak, and the wavelength is 500 nm? (Convert your result so the angle is between 0 and 360°.)
A. 145° B. 155° C. 165° D. 135° E. 95°
A nearsighted person has her distant vision corrected using a -2.0-diopter contact lens. Her uncorrected near point is 15 cm. What is her near point using this lens if the lens is 2.0 cm from the eye?
A) 17 cm B) 20 cm C) 13 cm D) 18 cm E) 15 cm
An air-track cart is attached to a spring and completes one oscillation every 5.67 s in simple harmonic motion
At time t = 0.00 s the cart is released at the position x = +0.250 m. What is the position of the cart when t = 29.6 s? A) x = 0.0461 m B) x = 0.210 m C) x = 0.218 m D) x = 0.342 m E) x = -0.218 m