I NEED THIS ASAP Gravity is an example of which kind of force??
A) contact
B) noncontact
C) speed
D) direction

Astudent observes a star from two positions of earth in its orbit, in summer and winter, and measures the change in the position of the star. which of these can be best calculated by this method?

2points what is the term for a female reproductive cell? a. egg b. chromatid c. allele d. fertilization

Ineed a chemical reaction takes place in which erlergy is released. arrange the reaction's characteristics in order from start to finis lower energy of reactants higher energy of products higher energy of reactants transition state sd lower energy of products