Chemical reaction produces new substances.
If you can identify substances you look for some differents befor and after. if find then sure there was chemical reaction.

3 0

3 years ago

If an object is in equilibrium, which of the following statements is NOT true?

Naddik [55]

Equilibrium is when the opposing forces or influences are balanced. So it would be E!

5 0

4 years ago

A chair of weight 70.0 N lies atop a horizontal floor; the floor is not frictionless. You push on the chair with a force of F =

Annette [7]

Answer:

94.67 N

Explanation:

Consider a free body diagram with force, F of 41 N applied at an angle of 37 degrees while the weight acts downwards. Resolving the force into vertical and horizontal components, we obtain a free body diagram attached.

At equilibrium, normal reaction is equal to the sum of the weight and the vertical component of the force applied. Applying the condition of equilibrium along the vertical direction.

$\begin{array}{l}\\\Sigma {F_y} = 0\\\\N - W - F\sin \theta = 0\\\\N = W + F\sin \theta \\\end{array}$