What are two radioactive isotopes that are useful for dating rocks that are older than 10 million years ?

How is the gravitational force related to the distance between two objects?

Describe uniform velocity and variable velocity in short

Calculate the first and second velocities of the car with four washers attached to the pulley, using the formulas v1 = 0.25 m / t1 , and v2 = 0.25 m / (t2 – t1) where t1 and t2 are the average times the car took to reach the 0.25 and the 0.50 meter marks. record these velocities, to two decimal places, in table e.