Think of it this way: If you test only one variable then you know that the difference in the experimental and control setup is that one independent variable. If you test more than one you will not know which one made the difference. Hope this helps :)
In physical terms, a force does work if it moves an object in the direction the force is pointing towards.
In your example, the force is pushing a tray up. But the force doesn't move the tray any further up. It remains at the same height.
The is no force done by this force.
Answer:
Well I think that 16 year olds should get a job because this could benefit them. They can learn to save and manage there own money. And I think that 16 yrs olds should get a job because this can help them in positive way.
Explanation:
Hope this made sense and help!!!
Answer:
Animals get the nitrogen they need by eating plants or other animals that contain nitrogen.
Explanation:
Answer: 0.22
Explanation: Subtract 0.01kg from 0.23kg
