Which is the best example of the concept of heredity? A. A black cat blends into its environment at night. B. A baby has his mother's hair and eye color. C. As a barnacle grows, it gets calcium for its shell from seawater. D. The sunflower will move so its flower head is always facing the sun.

Answer:

The rate at which work is done is called Power.

Explanation:

Power is work done per unit time. or it can also be defined as ratio of work done to time taken to complete the work.

Mathematically the power (P) is given as:

1 watt = 1 Joule/second

Where:

W = Work done in time T.

T = Time taken to complete the work

The rate at which work is done is called Power.

Answer:

AgCl + NaNO₃

Explanation:

• The reaction between silver nitrate and sodium chloride is an example of a double displacement reaction.
• In a double displacement reaction compounds or salts reacts and exchange cations or anions to form new compounds or salts.
• In this case, silver nitrate and sodium chloride exchange anions and cations to form silver chloride and sodium nitrate.

• Therefore, the complete reaction is given by;

AgNO3 + NaCl → AgCl + NaNO₃

• But since silver chloride is a precipitate, the reaction may also be an example of a precipitation reaction.

The correct answer to the question is : C). Chemical energy.

EXPLANATION:

A gas stove provides energy when the gas present inside it, is burnt.

The gas contained inside it are natural gases which contain chemical energy. When gases come under fire or electric spark, the chemical energy is converted into light and heat energy.

No nuclear, electric or sound energy are consumed in providing power .

Hence, the correct statement is chemical energy.

Answer:

A 0m

Explanation:

The horse runs clockwise round the strack, then goes back to the start line ending up back at the same place when it started.