What are the five senses that we use to make observations in Science?

When a postitive charge is placed in a electric field the field will

When in orbit, astronauts experience weightlessness. What is this caused by? The astronauts have no mass in space. Gravitational forces do not occur in space. The astronauts experience no contact (normal) forces with their surroundings.

A force of 150 N is applied to a 25 cm - piston in a hydraulic machine. What is the area of a larger piston if the force is 49.8 N?

Which of the following could cause the experiment to be less reliable?

Which are responsible for holding atoms together? A.) energies B.) shared protons C.) shared neutrons C: shared electrons

Which phases of matter do molecules have the lowest amount of energy?

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?