Two objects with a mass of 2 kg and 4 kg, respectively, are moving at a speed of 20 m / s. The momentum of each of these objects is ...
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Answer:
<em>40kgm/s and 80kgm/s</em>
Explanation:
Momentum is the amount of motion a body possesses. It is mathematically expressed as;
Momentum = mass x velocity
For the first body,
Mass = 2kg
velocity = 20m/s
Momentum = 2 x 20 = 40kgm/s
For the second body;
Mass = 4kg
velocity = 20m/s
Momentum = 4 x 20 = 80kgm/s
Covalent compounds have bonds where electrons are shared between atoms. Due to the sharing of electrons, they exhibit characteristic physical properties that include lower melting points and electrical conductivity compared to ionic compounds.
<span>The option A is correct answer. The isotopes are X and Y. The isotopes are those which have same atomic number but different mass number. Since atomic number has same number of protons or electrons. Thus, isotopes have same number of protons or electrons. Therefore, X and Y are isotopes.</span>
