An x-ray tube contains a target consisting of atoms with z = 44. the high voltage in this tube is increased from zero. using the bohr model, find the value of the voltage at which the x-ray just appears in the x-ray spectrum.

List 10 personal goals with definition

What is the difference between miscible liquids and immiscible liquids?

Four heavy elements (A, B, C, and D) will fission when bombarded by neutrons. In addition to fissioning into two smaller elements, A also gives off a beta particle, B gives off gamma rays, C gives off neutrons, and D gives off alpha particles.

The movement of the planets and other celestial bodies in the Solar System is caused by 1. waves of solar radiation moving away from the Sun. 2. the repulsion of neighboring planets in the Solar System. 3. the sun's gravitational force 4.

What did the accident at the nuclear power plant in Chernobyl in 1986 demonstrate about the use of nuclear power that had not been previously demonstrated? The byproducts of the process are radioactive.

As stream velocity decrease, which factor will likely increase? A) erosion of the stream bank B) deposition of material in the stream C) amount of material carried downstream D) size of the particles carried downstream

What cells in the nervous signals travel through the nervous system

A mechanic pushes a 3.60 ✕ 103-kg car from rest to a speed of v, doing 5,130 j of work in the process. during this time, the car moves 21.0 m. neglecting friction between car and road, find v and the horizontal force exerted on the car.

Anika asks Eva to roll a basketball and then a bowling ball to her. Which requires more force to roll, and why?

Why does a buoyant force act on every object in a fluid? Pressure pushing up on the bottom of the object is greater than the pressure pushing down on the top.