As momentum, p = m x v = 0.2 x 400 = 2/10 x 400 = 80 kg m/s

More force is needed to stop a cricket ball (which has more mass) and less force is needed to stop a tennis ball (which has less mass). The force required to stop a moving ball is proportional to mass (m) ...

The central vacuole of some plant cells can occupy 50-90% of the cell volume.

Chloroplasts are involved in trapping light energy for photosynthesis. Leucoplast are colourless plastids that stores, material such as starch, oil and protein granules. Chromplasts are the coloured plastids that imparts colours to the plant.

Chloroplasts are pigment containing plastids. They are important for photosynthesis in plants. They contain various yellow or orange pigments in addition to chlorophyll.

When the light passes through the solution, then scattering of light by colloidal particles is observed and path of light beam becomes visible. This phenomenon is known as Tyndall effect

Starch solution is a colloidal solution; hence, it will show Tyndall effect.

When X is added water then the solution becomes suspension which is a heterogeneous mixture.

In second case, the particles settle down which were suspended throughout the bulk and the path became not visible.

Milk is a colloid with small particles of butterfat suspended through the liquid.