Why is it important to keep a fitness journal?

Students design a model roller-coaster track. they place a rubber ball at the highest point on the track and let it go. the ball rolls along the track pulled only by the force of gravity. eventually, it comes to a stop. which change to the design will result in the ball moving the greatest distance?

Carbon 14 is a naturally occurring stable

Which body part transports oxygen removes waste materials in carries nutrients to the body as part of the circulatory system