Two friends whisper at a volume of 20 decibels. Later, they converse at a volume of 40 decibels.

How much greater is the energy intensity of the conversation compared to the whisper?

A. 20 times

B. 10 times

C. 1,000 times

D. 100 times

In the absence of air, why does the horizontal component of velocity for a projectile remain constant while the vertical component changes

Pluto orbits the Sun at an average distance of 5.91 * 10^12 meters. Pluto's diameter is 2.30 * 10^6 meters and its mass is 1.31 * 10^22 kilograms. Charon orbits Pluto with their centers separated by a distance of 1.96 * 10^7 meters.

Which of the following statements is true? 1 mL = 1 g 1 g = 1 oz 1 mL = 1 cm3 1 g = 1 cm

Desalination is needed in order to obtain potable water from __. A glaciers B aquifers C lakes D oceans

2. An elephant puts a force of 30,000 N on its four feet, which have a total area of 0.75 m2. What is the pressure it puts on the ground?

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