The energy for all forms of muscles contractions during peristalsis, heart-beating, uterine contractions during birth, etc. are primarily provided from A. Adenosine triphosphate
B. Phosphkcreatine
C. Oxidative phosphorylation
D. Guanosine triphosphate ​

C) electrons encircling a nucleus with neutrons and protons

Following are the  advantages of the parametric equations: 1) they can be used to graph curves that are not functions, like the unit circle.2) the parameter can be used to represent the quantity that is  useful to  provide us with better information about the graph.3)  it is useful to convert between rectangular equations and parametric equations.with specific reference to chemistry,  parametric equations are employ for solving hydrogen and hydrogen-like ions, quantum mechanically. herein, cartesian coordinates are converted in spherical polar coordinates. the solution obtained, when plotted on spherical polar graph paper, provides visualization of atomic orbital such as s,p,d and f. 

The product formed when bao and h2o  react together is                        ba(oh)2that is  bao + h2o = ba(oh)21 mole of    bao    react  1 mole of h2o  to    form  1 mole  of ba(oh)2

#2- the hno3 has a h+ ion and the naoh has an oh- ion