Using the sample in question 3 how many counts per second would be observed when the detector is 19 meters away from the sample

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

While on vacation, a student picks up surface rocks from around the world to add to her rock collection. The composition of her rock samples will be primarily

If for every action, there is an equal and opposite reaction, then how can forced be imbalanced? For example, somebody skydiving?

How old is a bone that has 12.5% of the original amount radioactive carbon 14 remaining?

Predict whether sound will would travel faster in air in summer or in winter?

A swimming pool has the dimensions of 10 meters, 5 meters, and 1 meter. What is the pool's volume? 50 m 50 m3 50 m2 25 m3

A child pushes horizontally on a box of mass m which moves with constant speed v across a horizontal floor. The coefficient of friction between the box and the floor is μ. At what rate does the child do work on the box?

What two qauntities must be known to calculate the density of a sample of matter

An element's atomic number is 38. How many protons would an atom of this element have?

What's are some forms of chemical energy