A boulder released by a rockslide rolls 60 m in 4 s. What is its average speed?

Which types of energy is thermal energy a form of

A radioactive isotope of potassium has a half-life of 20 minutes if a 40 g sample of this isotope is allowed to decay for 80 minutes how many grams of the r adioactive isotope will remain

What info determines using velocity time graph

Which of the following is a characteristic of science? Testing many variables at once Each scientist gets unique results when doing the same experiment Using controlled conditions Starting with the answer that you want

Explain the relationship among negative charges, positive charges, electrons and protons.

When a certain isotope, such as U-238, is hit by a neutron, it will always split into the same smaller nuclei. true or false?

A person walks 7 feet east stops and walks 7 feet west

Using the drop-down menus, choose the right government service to complete each sentence. Providing a free public education for all children is an example of supporting. Fighting fires is one way in which the government ensuresfor citizens.

A galilean telescope adjusted for a relaxed eye is 36cm long. If the objective lens has a focal length of 40cm, what is the magnification?

If a car goes along a straight road heading east and speeds up from 45 ft/s to 60. ft/s in 5 sec, calculate the acceleration