Answer:
Dissolving a solid in liquid, such as table salt in water, is a physical change because only the state of the matter has changed.
Explanation:
Activation energy?? The energy needed to start a chemical reaction is called activation energy
Answer:
<h2>80 N</h2>
Explanation:
The force acting on an object given it's mass and acceleration can be found by using the formula
force = mass × acceleration
From the question we have
force = 40 × 2
We have the final answer as
<h3>80 N</h3>
Hope this helps you
Chopping wood
ripping pants
breaking something in half
molding clay
