An x-ray tube produces photons down to a 0.0827 nm wavelength. What is the accelerating potential for this tube?

A. 123 kV
B. 9.22 kV
C. 8.00 kV
D. 10.0 kV
E. 15.0 kV


E. 15.0 kV

Physics & Space Science

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A 3.0-kg object moves to the right at 4.0 m/s. It collides head-on with a 6.0-kg object moving to the left at 2.0 m/s. Which statement is correct?

A) The total momentum both before and after the collision is 24 kg ? m/s. B) The total momentum before the collision is 24 kg ? m/s, and after the collision is 0 kg ? m/s. C) The total momentum before the collision is 0 kg ? m/s, and after the collision is 24 kg ? m/s. D) The total momentum both before and after the collision is zero. E) None of the above is true.

Physics & Space Science

The atomic number equals the number of protons in a nucleus

a. True b. False Indicate whether the statement is true or false

Physics & Space Science

A 51 g steel ball is released from rest and falls vertically onto a steel plate. The ball strikes the plate and is in contact with it for 0.5 ms. The ball rebounds elastically, and returns to its original height

The time interval for a round trip is 3.00 s. In this situation, the average force exerted on the ball during contact with the plate is closest to: A) 3,000 N B) 1,500 N C) 2,490 N D) 2,000 N E) 3,500 N

Physics & Space Science

A charge of 8.0 pC is distributed uniformly on a spherical surface (radius = 2.0 cm), and a second charge of ?3.0 pC is distributed uniformly on a concentric spherical surface (radius = 4.0 cm). Determine the magnitude of the electric field 5.0 cm from the center of the two surfaces

a. 14 N/C b. 11 N/C c. 22 N/C d. 18 N/C e. 40 N/C

Physics & Space Science