The most abundant gas in the Earth's atmosphere is:

a. oxygen

b. carbon dioxide

c. hydrogen

d. nitrogen

What is the frequency of a wave with a speed of 1250 m/s and a wavelength of 5 meters?

What are some examples of irreversible processes in nature?

Un proyectil es disparado horizontalmente con una angulo de tiro de 30 grados y una velocidad inicial de 850 metros por segundo.

11. Betty and Bianca weigh the same amount and they climb a flight of stairs. Betty climbs the stairs in 30 seconds. Bianca climbs the stairs in 40 seconds.

Which of the statements best describes what happens to mass during a chemical reaction? The mass is rearranged. The mass amount stays the same. The mass is ionized. The mass amount is destroyed.

How far can a person run in 15 minutes if he or she runs at an average speed of 16 kilometers / hours?

In the parts that follow select whether the number presented in statement A is greater than, less than, or equal to the number presented in statement B. Be sure to follow all of the rules concerning significant figures. Statement A: 2.

All your cells contain proto-oncogenes, which can change into cancer-causing genes. Why do cells possess such potential time bombs? A. Cells produce proto-oncogenes as a by-product of mitosis. B.

What is the mass of a basketball that is shot with 12N of force at an acceleration of 4m/s2?

Why do metals have similar properties?