Which of the following must be true in order for an object to stay in place?

a) the forces must be balanced.

b) the forces must be positive.

c) the forces must be negative.

d)the forces must be gravitational.

Determine the wavelength of the light absorbed when an electron in a hydrogen atom makes a transition from an orbital in the n=3 level to an orbital in the n=7 level.

The rules of engagement (roe) working group is often used to (select all that apply.)

Predict the relative bond lengths of the three carbon-oxygen bonds in the carbonate ion (co2−3). what would you expect the charge to be on each oxygen? match the words in the left column to the appropriate blanks in the sentences on the right. make certain each sentence is complete before submitting your answer.