If the distance between two masses is tripled, the gravitational force between them changes by a factor of

Which simple machine is NOT correctly matched with an appropriate task for its use? a lever: Removing a nail from a board an inclined plane: Moving a heavy box up to the second floor of a building.

IP Consider a parallel-plate capacitor constructed from two circular metal plates of radius R. The plates are separated by a distance of 1.4 mm. (a) What radius must the plates have if the capacitance of this capacitor is to be 1.8

Joaquin has hockey practice at the same ice rink where Alton has curling practice. One day, they were both playing on the ice with their equipment.

An earthquake is what happens when two blocks of the earth suddenly slip past one another. The surface where they slip is called a A) fault. B) epicenter. C) foreshock. D) tectonic plate.

The class of anthropogenic compounds responsible for the breakdown of stratospheric ozone are known as

Scientists who study races and their origins are called A. anthropologists. B. ethnologists. C. paleontologists. D. sociologists.

Why are telescopes that detect non - optical radiation useful for studying objects in space

Which of the following is not an application of Doppler technology? police speed guns weather radar ultrasound imaging of the liver determining the motion of a star

For a constant voltage, increasing the resistance will cause the current to decrease. true or false

Which of the following is an example of a testable scientific hypothesis? A) Why do plants grow better in the Sun than in the shade? B) Peacocks have prettier tail feathers than pigeons do.