Derived Units

Q.

An element having a bcc structure has $12.08\times {10}^{23}$ unit cells. The number of atoms in these cells is:

1. $12.08\times {10}^{22}$

2. $12.08\times {10}^{23}$

3. $24.16\times {10}^{23}$

4. $48.38\times {10}^{23}$

Q. The two types of units are units and derived units.

1. complex
2. simple
3. base

Q. The unit of speed is $m/s$. It is a _______ unit.

1. SI unit
2. derived
3. length
4. time

Q. The unit of Speed which is metre per second is a unit.

1. base
2. derived
3. non derived

Q. If Kamal takes 20 seconds to run in a 100 metre running race, then what is his speed?

1. $4m/s$
2. $5m/s$
3. $6m/s$
4. $7m/s$

Q. The unit of density is ____.

1. $\frac{kg}{m^3}$
2. $\frac{m^3}{kg}$
3. $m^3$
4. $\frac{m}{s}$

Q. What is the ratio of the number of rectangular planes to the number of diagonal planes in a unit cell.