The heart is made out of 11. Muscle. It is a double 12. that squeezes the blood around the 13. and to the 14. .
The 15. side pumps blood to the lungs to pick up 16. .
The 17. side pumps blood around the rest of the body.
pahelp hehe

Which notation is used to represent an alpha particle? a. b. c. d.

What is the temperature in degrees celsius of a substance with a tempature of 49k

Aparticle's position is given by x = 3.00 - 9.00t + 3t2, in which x is in meters and t is in seconds. (a) what is its velocity at t = 1 s? (b) is it moving in the positive or negative direction of x just then? (c) what is its speed just then? (d) is the speed increasing or decreasing just then? (try answering the next two questions without further calculation.) (e) is there ever an instant when the velocity is zero? if so, give the time t; if not, answer "0". (f) is there a time after t = 3 s when the particle is moving in the negative direction of x? if so, give the time t; if not, answer "0".