<h3><u>Answer;</u></h3>
C. 352.6 m/s
<h3><u>Explanation;</u></h3>
Velocity of sound is dependent on temperature. An increase in temperature, increases the velocity of sound.
To calculate the velocity of the sound wave, we use this formula:
V = 331 + [0.6*T]; Where V is the velocity and T represents temperature.
When the temperature is 36 degree Celsius, we have
V = 331 + [0.6 * 36]
V = 331 + 21.6 = 352.6
Therefore,
V = 352.6 m/s.
Yes but nothing can travel faster than the speed of light
The answer is B. Boron
The number of electrons and protons are always the same in an atom.
There are 5 electrons which means there are also 5 protons.
The number of Protons determines the atomic number of an element.
Since the element has 5 protons its atomic number is 5, the same atomic number as Boron
Density of copper can be calculated using the following formula:
Here, m is mass and V is volume, thus, to calculate density first calculate mass and volume of copper.
In FCC, number of atoms in a unit cell are 4, atomic mass of Cu is 63.546 g/mol and number of atoms in 1 mole is 
.
Mass of Cu will be:
Now, volume can be calculate as:
Here, a is edge length.
First convert edge length from pm to cm
Thus,
Putting the value,
Now, from mass and volume density can be calculated as follows:
Therefore, density of copper will be 
.
Your answer would be, true.
