A b c or d about the earth...
this is easy if u know

What type of nuclear decay causes the atomic number of an element to increase by 1?

The diagram shows a series of volcanic island and a hot spot determine the direction of movement of the tectonic plate that for the island

The period of a pendulum varies directly as the square root of the length of the pendulum and inversely as the square root of the acceleration due to gravity. find the period when the length is 144 cm and the acceleration due to gravity is 980 cm per second squared, if the period is 7pi seconds when the length is 289 cm and the acceleration due to gravity is 980 cm per second squared.