What does variable mean in science?

Perihelion effect on gravity

A rock is rolling down a hill. At position 1, it's velocity is 2.0 m/s. Twelve seconds later, as it passes position 2, it's velocity is 44.0 m/s. What is the acceleration of the rock? 42.0 m/s^2 3.7 m/s^2 3.8 m/s^2 3.5 m/s^2

Which one of the following is not a type of bike? A. Hill B. Mountain C. Road D. Street

Pneumonia and strep throat are caused by: bacteria mold yeast virus

A hockey puck sliding on a frictionless surface strikes a box at rest. After the collision, the two objects stick together and move at some final speed.

When one object heats another, does the temperature increase of one object always equal the temperature decrease of the other object? Explain

Add the following displacement vectors: 12 m south and 15 m 55° E of N?

And electric current is produced by which of the following processes? A. Electrical resistance B. Transfer of protons C. Convection currents D. Electromagnetic induction

The basic building block of life is

What is the reason for Mary's resemblance to her mother. Mary's relatives and friends feel she had her mothers feature