Question

b) Find the power of engine that can fire water jet of density 1000 kg/m3
at the speed of 30m/s upward from the pipe of radius 1cm? (2)
c) After release of jet, energy is lost by the engine. How principle of conservation of energy is obeyed in this condition.

Answer 1

Answer:

hope this helps

Explanation:

Energy. It’s a word you hear all the time. We use chemical energy to heat our homes

and bodies, electric energy to run our lights and computers, and solar energy to grow

our crops and forests. We’re told to use energy wisely and not to waste it. Athletes

and weary students consume “energy bars” and “energy drinks.”

But just what is energy? The concept of energy has grown and changed over time,

and it is not easy to define in a general way just what energy is. Rather than starting

with a formal definition, we’ll let the concept of energy expand slowly over the course

of several chapters. In this chapter we introduce several fundamental forms of energy,

including kinetic energy, potential energy, and thermal energy. Our goal is to understand the characteristics of energy, how energy is used, and, especially important, how

energy is transformed from one form into another. Understanding these transformations will allow us to understand and explore a wide variety of physical phenomena.

Anything that happens involves a transformation of energy from one form to another,

so the range of topics we’ll consider in this chapter is extensive.

In solving problems, we’ll use a key fact about energy: Energy is neither created

nor destroyed: If one form of energy in a system decreases, it must appear in an

equal amount in another form. Many scientists consider this law of conservation of

energy to be the most important of all the laws of nature.