The speed of sound is given by the formula
Speed of sound = square root (Young's Modulus/density)
Young's modulus for gold = 78 GPa which is 7.8 * 10^10 Pa
Speed of sound = (7.8 * 10^10 / 19.3 ) = sqrt (4.04 * 10^9 )
Speed of sound = 6.36 * 10^4 m/s <<<=== answer.

6 0

3 years ago

Magnesium, the element, is produced commercially by electrolysis from a molten salt (the "electrolyte") using a cell similar to

kirill115 [55]

Answer:

The half-reaction that occurs on the anode of an electrolytic cell is called oxidation.

This can easily be depicted by a chemical reaction as such "Zn(s) = Zn2+ (aq) + (2e-)"

While, the Zinc in this reaction loses two elections. Hence copper gains those electrons and becomes solid.

These reactions occurring on the anode are called positive reactions.

While the reaction that occurs on the cathode is called reduction. This reaction can be represented by this equation "Cu2+ (aq) + 2e- = Cu(s)".

These non-spontaneous reactions occurring in an electrolytic cell together are called redox reactions. These generate electrical energy.

7 0

3 years ago

Population doubles in ever decreasing time periods, especially since 1850. What is responsible for this trend?

Firlakuza [10]

Answer:

The larger the population the larger the increase

Explanation:

Took the quiz as an openbook quiz and got it right

7 0

3 years ago