Which material best absorbs sound waves in a room?

a. heavy curtains

b. hardwood floors

c. brick walls

d. cement floors

Predict the products butane (c4h10) + oxygen —>

Transportation is the largest single source of air pollution in the united states. air pollution can harm the environment and human health. which technology could offer a solution to this problem? mufflers that reduce noise motors that run on electricity tires that improve gas mileage

How does climate change cause the ocean's thermohaline current to slow down?