The element sodium has an atomic number of 11 and a mass number of 23. how many protons, neutrons, and electrons does one atom contain?

How high must a basketball of mass 0.62 kg be lifted to increase its GPE by 6.7 J?

Consider a cylindrical nickel wire 1.6 mm in diameter and 2.5 * 104 mm long. Calculate its elongation when a load of 320 N is applied.

Volume of an block is 5 cm3. If the density of the block is 250 g/cm3, what is the mass of the block?

What are the different forms of radiation on the electromagnetic spectrum

Why is alternating current more effective at long-distance travel than direct current? The power lines are made out of conductors. Transformers increase or decrease voltage as needed. The AC generator is more efficient. AC has lower voltage than DC.

The electric field near the earth's surface has magnitude of about 150n/c. what is the acceleration experienced by an electron near the surface of the earth? express your answer to two significant figures and include the appropriate units.

Minerals are considered to be Answer made out of rocks the building blocks of rocks extremely rare and valuable difficult to find

the solubility product of lead fluoride is 3.6 x 10-8. what is its solubility in 0.10M NaF solution, in grams per liter

A passenger on a bus moving east sees a man standing on a curb. from the passenger's perspective, the man appears to

Which of the following is the best example of a proper hypothesis? Water will flow faster through tightly packed soil than through loosely packed soil. I think there is no effect on hearing if you listen to loud music for only three hours a day.