In 2016, the city of Rio de Janeiro had a population density of 5377 people/km2.

What was the population density of Rio in people per square meter?

Which of the following may be described as a saturated hydrocarbon? 1. Octane 2. Propene 3. Hexene 4. Ethylene

The speed of sound varies depending on many factors including temperature, pressure, and humidity, but it is typically found to be approximately 330 m/s. What is the frequency of a sound wave with a wavelength of 0.1 m?

How much greater is the light-collecting area of a 6-meter telescope than a 3-meter telescope? how much greater is the light-collecting area of a 6-meter telescope than a 3-meter telescope?

Which happens during the day at the beach? A. The water is warmer than the land, and air sinks over the water B. The water is cooler than the land, and air sinks over the water C. The water is warmer than the land, and air rises over the water D.

Which of these may be longitudinal or traverse A: seismic wave B: microwave C: radio waves D: sound waves

An oil drop with a mass of 8.3 grams and a charge of + 2.2 mC is floating 7.68 meters above a positively charged floor. What is the magnitude of the charge on the floor?

True or false? disk blocks are made up of one or more sectors

Write a paragraph showing the relationship between chemistry and physical based on what you've learned from the periodic table

An aluminum screw has a density of 2.7 g/mL and a volume of 15mL. What is the mass of the screw?

Compare and contrast power and work.