X-ray tube to knock a k-shell electron
What is the minimum potential difference that must be applied to an X-ray tube to knock a K-shell electron completely out of an atom in a copper (Z = 29) target? Use the Bohr model as needed.
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A drop of saline forms on the tip of a 5 mm diamter needle that is held in the verticle position. What is the maximum size the drop will form before separating from the needle and falling?
A consumer watchdog agency selects a random sample of 40 taxpayers for further study. A. What is the shape, mean(expected value), and standard deviation of the sampling distribution of the sample mean for samples of size 40? B. What is the probabi
5-15 Air at at 300°K and 1 atm. flowing over a flat plate at 30 m/s, how thick is boundary layer at 2.5 cm from the leading edge of the plate? How much is the thickness at 5 cm?
Air flows over a flat plate at a constant velocity of 20 m/s and ambient conditions of 20 kPa and 20°C. The plate is heated to a constant temperature of 75°C, starting at a distance of 7.5 cm from the leading edge.
Sketch the ball termperature verses time for 0<t<1 hour. Also show the ambient temperature, T_infinity, in your graph. Explain the special features of the ball temperature behavior
A 1 kg ideal gas mixture at 1 atm has the following mass composition: 15% O2, 50% N2, 35% CO2. Calculate using tabulated enthalpies only, the amount of energy (in kJ) required to raise the temperature of the gas mixture from 100 °C to 200 °
Determine the maximum allowable uniform load w that can be supported by the fiberglass beam if b = 125 mm and the allowable bending stress for the material is sallow = 13 MPa
Two percent (.02) of the items produced by a machine are defective. A random sample of 60 items is selected and checked for defects. What is the probability that the sample will contain 5% or more defects?
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