The atomic number of magnesium is 12. Its nucleus must contain A) 6 protons and 6 neutrons. B) 6 neutrons and 6 electrons. C) 12 neutrons and no protons. D) 12 protons and no electrons.

What is the diffrance between newtons and force

A sample container of carbon monoxide occupies a volume of 435 ml at a pressure of 785 torr and a temperature of 298 k. What would its temperature be if the volume were changed to 265 ml at a pressure of 785 torr?

Jim is performing a magic show where he has to lie on the plank fixed with 1000 nails. He weighs 650N. Each nail has an area of 0.000001 m2. The pressure requires to penetrate through a person skin is about 700kPa.

Which statement is true about divorce in the United States? ' A. The divorce rate is lower for second marriages than first marriages. B. Divorce usually leads to a higher income and higher standard of living. C.

One atom has 14 neutrons. Another has 13 neutrons. Both have 13 protons. These atoms are ... A. isotopes B. different elements C. Molecules D. Ions

How was dyslexia treated in the past and how is dyslexia treated today?

The work of Charles Kuen Kao is likely to have been most influenced by the work of which of the following scientists? A. Galileo Galilei B. Christian Doppler C. Sir Isaac Newton D. Ibn al-Haytham

Suppose a car is moving in a straight line and steadily increases its speed. It moves from 35 km/h to 40 km/h the first second and from 40 km/h to 45 km/h the next second. What is the car acceleration?

Why can crevasses in glaciers only be 50 meters deep? A. Plastic flow occurs below that depth. B. Glaciers cannot be thicker that 50 Meters. C. Surges prevent plastic flow below that depth. D. Basal slip occurs below that depth.

What are the changes to Earth's surface that occur as a result of plate movement