7. and 8. , i would prefer someone to explain how to do it

#7

Given that an electron revolves in a circle and the essential centripetal force is given as

now we need to find its speed

so we know that this force is given as

#8

Here the force due to earth on satellite is the centripetal force to revolve around earth

so we can say that force due to earth is given as

we know that

now from above equation we have

the total distance traveled by the car is

30km + 49km = 79 km .

answer

procedural programming, object-oriented programming

explanation

procedural programming is a type of computer programming language that specifies a series of well structured steps and procedures   within its development period of time. it contains a systematic order of statements, functions and commands to complete a computational task or program. it is centered on creating procedures. while object oriented programming is a programming language that is centered on creating objects rather that actions and data rather than logic.. it has four principles which are inheritance, polymorphism, abstraction and encapsulation