Given that r1=3i-2j+k, r2=2i-4j-3k and r3=-1+2j+3kfind the magnitude ofa= /R/=r1+r2+r3. And b=/A/2r1+2r1-3r2-5r3

An inclined plane wrapped around a metal shaft is a a. lever b. screw c. pulley d. wedge

Classify each possible hypothesis about a medicinal aloe vera plant as falsifiable or non-falsifiable. aloe vera gel is the best natural skin moisturizer. aloe vera gel can heal wounds by boosting cell renewal. aloe vera juice tastes better than carrot juice. drinking aloe juice can reduce the risk of lung cancer.

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?