Some compounds are classified as acids or bases . the ph scale shows how acidic or how basic these compounds are the lower the ph the more acidic a compounds is the higher the ph the more basic it is . sodium hydroxide a compound commonly found in drain cleaners has a ph of about 13. which of these phrases describe sodium hydroxide

Which statements about tornadoes are true? check all that apply. (a) about 12,000 tornadoes hit the united states every year. (b) a tornado looks like a funnel. (c) tornadoes are deadly atmospheric storms that cause millions in damages each year. (d) tornadoes can reach wind speeds of more than 300 miles per hour. (e) kansas is the state with the most tornadoes. (f) you will always notice a funnel before a tornado strikes.

The free body diagram shows a box being pulled to the left up a 25-degree incline. the magnitude of the normal force is

Engineers find a new metal that is stronger than steel but much lighter. this material is also significantly cheaper than what is currently used for most aircraft, available in large quantities, and easy to manufacture. the engineers are excited because this new material will lower the costs of buying and operating airplanes for companies. what is probably the best step for the engineers to make next?