Rob measures the solubility of three different salts in water at 22°C.

Answer: 200 W

Explanation:

In physics, power is defined as the amount of work done divided by the time taken to do that work:

where W is the work done and t is the time.

In this problem, the work done is W=600 J, while the time taken is t=3 s. Substituting into the formula, we find the power:

The motion of the object is best depicted by graph B. Therefore, option B is correct.

This is because the object is initially accelerating downwards due to the force of gravity. However, when it encounters the pool, the upward resistance force counteracts the force of gravity, and the object's velocity slows down. The object will eventually reach a terminal velocity, where the upward resistance force is equal to the force of gravity, and the object will no longer accelerate.

Graph A shows a constant velocity, which is not possible in this case. Graph C shows an initial acceleration downwards, followed by an acceleration upwards. This is also not possible, as the object cannot accelerate upwards while it is still in contact with the pool. Graph D shows a constant acceleration downwards.

Learn more about motion, here:

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Graph B represents correct graph for velocity time Explanation:Initially the object is dropped under the influence of constant force due to gravitySo here we can say its acceleration is constant due to gravityhence here the velocity will increase downwards due to gravity and it is given asnow when it enters into the pool an upward force of same magnitude will act on itso net force on it is so here we will have no acceleration and it will move with constant speed after that so here correct graph is Graph B

Answer:

Ions are atoms that carry an electric charge.

Explanation:

An ion is an atom or molecule that does not have a neutral electric charge. In other words, ions are atoms or groups of atoms that have an electric charge. Ions with a positive charge are called cations. Those with a negative charge are called anions.

Ionization is the formation of electrically charged molecules or atoms. Atoms are electrically neutral. The loss of one or more electrons from a neutral atom forms a cation. Conversely, an anion is an ion whose net charge is negative due to an increase in the number of electrons.

Cations and anions are usually represented with the symbol of the corresponding atom or group of atoms and the symbol "+" or "-", respectively. If the number of electrons gained or lost is greater than one, this is indicated by the corresponding number.