An electron of mass 9.11 10-31 kg has an initial speed of 3.80 105 m/s. it travels in a straight line, and its speed increases to 7.60 105 m/s in a distance of 4.20 cm. assume its acceleration is constant. (a) determine the magnitude of the force exerted on the electron. 0.82875492 incorrect: your answer is incorrect. your response differs from the correct answer by more than 10%. double check your calculations. n (b) compare this force (f) with the weight of the electron (fg), which we ignored. f fg =

Explanation:

The acceleration experimented by the electron can be calculated using the formula , so we have:

The magnitude of of the force exerted on the electron can be then obtained using Newton's 2nd Law F=ma.

Putting all together we have:

And using our values (and that 4.2cm are 0.042m):

Then we compare this force with the weight of the electron:

So this force is 525702635794 times larger than the weight of the electron.

By definition, the expression CaCO₃ → CaO + CO₂ is an example of a chemical equation.

A chemical reaction is any process in which at least the atoms, molecules, or ions of one substance are changed into atoms, molecules, or ions of another chemical substance.

A chemical equation is a symbolic description used to describe the identities and relative quantities of the reactants and products involved in a chemical reaction.

The information contained in the chemical equation allows us to determine the substances that are transformed or modified in a reaction, called reactants or reagents, and the new substances that originate in a chemical reaction, called products.

In order to represent what happens in a chemical reaction by means of an equation, it must comply with the Law of conservation of matter and with the Law of conservation of energy. That is, the equation must indicate that the number of atoms of the reactants and products is equal on both sides of the reaction and that the charges are also equal. In other words, you must have a balanced equation.

Finally, the expression CaCO₃ → CaO + CO₂ is an example of a chemical equation.

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