How do I count atoms in science

A 57.0-kg boy and his 43.0-kg sister, both wearing roller blades, face each other at rest. The girl pushes the boy hard, sending him backward with a velocity 3.00 m/s toward the west. Ignore friction. (a) Describe the subsequent motion of the girl.

Will give brianliest to correct answer The gravitational force between two objects is (Blank) proportional to the product of the masses of the objects.

Which of the following is not true about the Global Positioning Systems (GPS) ? a. GPS can determine the composition of soil on mountain ranges. b. GPS can determine latitude and longitude of a given area. c.

Speedy, the super-swift squid, swims sideways at 5.3 m/s. If he suddenly uses his ink jet to accelerate at 15 m/s/s for 2.1 s, what is his final speed in miles per hour? Round to no decimal places.

What are the different types of forces and how do they act on objects

Which physical quantities has the unit kg·m·s-1?

Can an object travel at the speed of light? Why or why not?

Determine the amount of potential energy of a 5 Newton's book that is moved to three different shelves on a bookcase. The height of the shelves is 1.0 meter, 1.5 meter, and 2.0 meter

Which atom is involved in giving your heart energy to beat? carbon gold oxygen iron

Which of the following is the most accurate statement concerning the properties of matter? a. they can be written as symbols b. they can be observed and measured c. they cannot be tested or verified d. they change with the amount of matter present