Use tide and tidal range in the same sentence

The mass of a neutron is equal to the mass of a proton plus the mass of an electron. true or false false true

Which of the following would be an accurate picture of the earth during the summer time of the northern hemisphere?

The famous scientist galileo galilei did several experiments with sloping planes, which he rolled metal balls down so that he could study motion. by changing the slope, he could study how the speed at which the ball rolled was affected. what was the independent variable in galileo's experiment? a. the speed of the ball b. the slope of the plane c. whether the ball moved d. what the ball was made of