Which of these formulas represents 1 atom of sodium (Na) chemically combined with another element?

A. PbS

B. NaCl

C. 2NaOH

D. Na2H3IO6

Suppose larry stands with more weight on one scale than the other if one scale reads 400 N. what does the other read?

Why do we classify elements

What is the source of energy for the process of evaporation?

There is a circuit with 4 amps and 10 ohm. what would the voltage be?

What is the wavelength of a wave? A.) The distance between two crests of a wave. B.) The amount of time that occurs in one full cycle. C.) The amount of cycles that occur in a given time D.) The size of the disturbance

Total internal reflection occurs only if

A radioactive nucleus at rest decays into a second nucleus, an electron, and a neutrino. the electron and neutrino are emitted at right angles and have momenta of 9.80 ✕ 10-23 kg·m/s, and 5.70 ✕ 10-23 kg·m/s, respectively.

A child is sliding down a slide at the playground. Is the mechanical energy conserved? Why or why not? The mechanical energy is conserved. There is as much KE at the end as there was PE at the beginning. The mechanical energy isn't conserved.

Which term refers to the rate at which the velocity of a moving object changes? A. acceleration B. displacement C. resonance D. turbulance

This is a number, as of years, days, minutes, or seconds representing such an interval. The SI standard unit of this is the second.