Answer:
Mechanical advantage is a measure of the force amplification achieved by using a tool, mechanical device or machine system. The device preserves the input power and simply trades off input forces against movement to obtain a desired amplification in the output force. The model for this is the law of the lever.
Explanation:
Answer: 4 valence electrons, Silicon, Si, 14, 28.0855, 14
Explanation:
Answer:
zinc and lead or copper and tin
Explanation:
these elements react both as an acid as well as a base