What is the most important use of an element's atomic number?

What does the equation n = Pout/Pin mean?

What is the mass of an object that has a density of 3.2 g/cm^3 and a volume of 5.5cm^3? (The density of an object has the equation d = m/v.)

3. All the water on Earth, including the water in the atmosphere, makes up the A. biosphere. B. hydrosphere. C. atmosphere. D. geosphere.

A rubber ball weighs 49 N ... a) What is the mass of the ball? (Answer: 5.0 kg). b) What is the acceleration of the ball if an upward force of 69 N is applied? (Answer: 4.0 m/s/s). For a) I used the equation W = Fg = mg, which becomes 49 = m (9.8).

Can enter through any cavity lined with mucus membranes

How do air quality scientists ensure the air is cleaned? What steps do they take?

Is a mirrors surface opaque or transparent or translucent?

Sound waves can combine to become bigger or smaller true or false

Archimedes supposedly was asked to determine whether a crown made for the king consisted of pure gold (density of gold is 19.3 * 103 kg/m3). According to legend, he solved this problem by weighing the crown first in air and then in water.

What are at least three types of energy involving a microwave