Dust storms blanket the midwest and send deposits as far east and ny and boston. True or False

The percent efficiency of a machine can never be 100% (or greater), because in the real world some energy is always converted into a. heat b. work c. input force d. output force

Oxygen and nutrients are moved through the body by the: a. circulatory system c. lymphatic system b. digestive system d. reproductive system

Which of the following is an example of motion in two dimensions?