What is centripetal force how do it work get the answer

In physics I am feeling difficult in solving problems in chapter kinematics in physics

What is an alloy and what are the characteristics of alloy maintain the difference between alloy and heterogeneous mixture and types of heterogeneous mixture and types of alloy

Conversion of si unit into cgs unit of area, volume, speed, acceleration,force ,pressures,work done ,momentum,torque,impulse,stress,strain,coefficient of viscosity,surface tension,density,frequency,charge,electric potential,surface energy,angular velocity,electric power

SUB : BIOLOGY

DAY 1 : Prepare a model of plant cell by using household materials like rice,

plastic bottles, wires, cardboard etc..

DAY 2 : Prepare a venn diagram of plant cell and animal cell ( similarities in

middle & differences in side )

DAY 3 : Make a flow chart of Tissues ( plants and animals) by using printed

diagrams or coloured diagrams

DAY 4 : Prepare a note on Types of tissues and there location and functions in a

tabular form