Select the statement that is true regarding scientific theories. a. scientific theories are what laws are called before they are proven. b. scientific theories attempt to explain why natural events occur. c. scientific theories are based on true facts. d. scientific theories describe natural events.

B. Scientific theories attempt to explain why natural events occur.

B. Scientific theories attempt to explain why natural events occur.

Explanation:

The scientific theories are the detailed explanations which gives reasons for the cause of natural events, processes and phenomena that occur in the natural world. These are supported by the evidences and observations that are obtained through experimental trials. These theories can be changed due to the changing of facts due to further experimental studies conducted by new generation scientists.

absorption lines are where light has been absorbed by the atom thus you see a dip in the spectrum whereas.

emission spectra have spikes in the spectra due to atoms releasing photons at those wavelengths.

explanation:

here we know that ball will drop down by total distance 3.2 m

so here we know that

now using kinematics

now in the same time it will cover horizontal distance of 0.75 m

so speed of the ball will be