Law of conservation of mass

"When you burn a log in the fireplace, the resulting ashes hae a mass less than that of the original log. Account for the difference in mass."

Five metals that are more useful for electroplating

What is the velocity of a quarter dropped from a tower after 10 s?

Inorganic limestone deposits found in rocks prove that the rock was underwater for a long period of time.

Why does the frequency of a siren get higher as an ambulance using that siren gets closer?

Consider the earth-moon system, the solar system, the galaxy and the universe. which is largest?

Modern oil tankers weigh over a half-million tons and have lengths of up to a quarter of a mile. Such massive ships require a distance of 5.0 km (about 3.0 mi) and a time of 22 min to come to a stop from a top speed of 26 km/h.

Suppose a yo-yo has a center shaft that has a 0.232 cm radius and that its string is being pulled. If the string is stationary and the yo-yo accelerates away from it at a rate of 1.50 m/s 2, what is the angular acceleration of the yo-yo?

How far into editing our human genes?

Which electromagnetic wave has the shortest wavelength? (A. Radio waves b. X-rays c. infrared rays or d. Visible light)

Which mixture can be separated based on differences in particle size of the components