How many Oxygen (O) atoms are in the following? H2O + CO2

4

3

2

How far can a person run in 15 minutes if he or she runs at an average speed of 16 km/hr

A slice of pizza has 500 kilocalories. If we could burn the pizza and use all the heat to warm a 50 liter container of cold water, what would be the approximate increase in the temperature of the water?

Geronimo wants to move an object 12 meters. Calculate the net work done by the object with an applied force of 150 N and a friction force of 37 N.

What internal process cause most earthquake

What goes up but never comes down i know the answer but do you?

Which represents a system that is almost completely closed?

If many household substances classify as acids or bases what is the ph scale

A protostar forms once the nebular cloud condenses and the core begins

How do whales bats and dolphins use echolocation? A To scare away predators B To attract mates C To orient them selves and find food D To tell animals of there species where they are

How much force would be needed to move a car with the mass of 100kg to an acceleration of 5m/s/s?