Which of these can be considered a system?

a computer

a car

a bicycle pedal

a pencil

a coffeemaker

If the earth rotated on an axis that was not tilted, how would this affect the seasons?

A man travles at an average velocity of 12 m/s for 4 seconds. what is the total distance travled by the man?

What do scientists call water

What is the acceleration of an object that moves at constant velocity? What is the net force on the object in this case? What is the acceleration of an object that moves at constant velocity? What is the net force on the object in this case?

The law of reflection states that the angle of incidence equals the angle of reflection. Define the angle of incidence in terms of a line normal to the sureface.

How many Oxygen (O) atoms are in the following? H2O + CO2 4 3 2

How does surface roughness affect friction

Why does it hurt your hands when you carry heavy shopping in carrier bags?

Why did scientists choose carbon as a base for the atomic mass unit? Which isotope of carbon did they use?

What organelle is found in all animal cells and some plant cells