<h2>

**Answer:**</h2>

3.01 atm

<h2>

**Explanation:**</h2>

According to Gay-Lussac's law, the pressure (P) of a given mass of gas when volume is left constant is directly proportional to the kelvin temperature (T) of the gas. i.e

P ∝ T

P = kT

Where;

k = proportionality constant

=> = k

=> = -------------------(i)

Where;

and are the initial and final pressures of the gas

and are the initial and final temperatures of the gas

From the question;

= 2.48 atm

= ?

= 21°C = (21 + 273)K = 294K

= 84°C = (84 + 273)K = 357K

Substitute these values into equation (i) as follows;

=> =

Solve for

=

= 3.01 atm

Therefore the pressure will be **3.01 atm**

**Answer:**

Mitochondria and chloroplast are organelles found in a plant cell. However, chloroplast is absent in an animal but mitochondria is found in both. Mitochondria generates energy for the cell in the form of ATP using oxygen and nutrients. Chloroplast is the site for photosynthesis in a plant cell.

**Answer**

**Force will be 1520.2604 N**

**Explanation:**

We have given mass of the bullet m = 10.1 gram = 0.0101 kg

Distance S= 0.6 m

Final velocity v = 425 m/sec

Initial velocity u will be 0 m/sec

From third equation of motion

We know that force is given by F = ma

So force = 0.0101×150520.833 = 1520.2604 N

Answer:

In B: Epb=9J

Explanation:

Potential energy: Ep=mgh where m is the mass, h altitude.

In point A: h=20cm=0.2m

Epa=12=0.2×mg. Thus mg=12/0.2=60N

In point B: Epb=mg×0.15=60×0.15=9J