Which statement is true about acceleration?

The cerebellum controls? thirst sensations sleep-wake cycles hand-eye coordination heart rate and pulse

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?

If the new moon happens on january 15th, what shape will it be on february 6th?