QUESTION 55 An X-ray exam produces an intensity of 320 Gy at a distance of 106...
QUESTION 98 A chest x-ray calls for 100 kVp kVp, 7 mAs, which results in an X-ray intensity of 379 Gy measured at the patient's location. If the mAs is increased to 16 mAs, what will the new X-ray intensity be? Give your answer to the nearest Gy. Include only the number portion of your answer. Do not include the unit. 1 points Save Answer
Two questions :) Question completion Status: QUESTION 8 If a tungsten targeted x-ray tube were to operate at 96 kVp, what would be the energy of the most abundant x-ray produced? 1 points QUESTION 9 An exam requires 100 kvp / 74 mAs with a 140 speed image receptor. What speed image receptor is required if the mAs is changed to 47 mAs? Give your answer rounded to the nearest whole number 1 points Save Answer
QUESTION 53 What is the relative probability that a 65 keV x-ray interacting photoelectrically with some contrast agent, (Zeff = 64) compared with soft tissue (Zeff = 7.7) ? Round your answer to the nearest whole number. 1 points Save Answer
QUESTION 83 An x-ray normally taken at 90 cm results in an intensity of 12 mR. If taken at 180 cm, the intensity would be 6 MR. 24mR 3 MR. 48mR
Two loudspeakers emit sound waves along the x-axis. The sound has maximum intensity when the speakers are 17 cm apart. The sound intensity decreases as the distance between the speakers is increased, reaching zero at a separation of 70 cm . What is the wavelength of the sound? (Express your answer to two significant figures and include the appropriate units.) (btw its not 106 cm)
An object is 16 cm in front of a convex mirror. The mirror creates an image that is 55 % as tall as the object. Use ray tracing to find the distance of the focal point from the mirror. Express your answer to two significant figures and include the appropriate units. f =
A cosmic ray electron moves at 7.4 x 106 m/s perpendicular to the Earth’s magnetic field at an altitude where field strength is 1.32 10-5 T. What is the radius (in meters) of the circular path the electron follows? The charge of an electron is 1.6 x 10-19 C and its mass is 9.11 x 10-31m. Your answer should be a number with two decimal places, do not include the unit.
A cosmic ray electron moves at 6.6 x 106 m/s perpendicular to the Earth’s magnetic field at an altitude where field strength is 1.37 10-5 T. What is the radius (in meters) of the circular path the electron follows? The charge of an electron is 1.6 x 10-19 C and its mass is 9.11 x 10-31m. Your answer should be a number with two decimal places, do not include the unit.
QUESTION 18 A 50 keV X-ray interacts with an electron in the M shell of barium and ejects it with 6 keV of kinetic energy. What will be the energy of the scattered x-ray? Give your answer in keV as a whole number. But do not include the unit - give only the number portion of your answer. Approximate Number binding of energy Shell electrons 0.3 0.01 Carbon-12 XZOG Barium 17 Ba XEZO Tungsten 18 W
Two loudspeakers emit sound waves along the x-axis. The sound has maximum intensity when the speakers are 15 cm apart. The sound intensity decreases as the distance between the speakers is increased, reaching zero at a separation of 62 cm. What is the wavelength of the sound? Express your answer to two significant figures and include the appropriate units. If the distance between the speakers continues to increase, at what separation will the sound intensity again be a maximum? Express...