What characteristics distinguish them from living organisms?
All living organisms share several key characteristics or functions: order, sensitivity or response to the environment, reproduction, growth and development, regulation, homeostasis, and energy processing.
What are some common themes of biology?
The five central themes of biology are structure and function of cells, interactions between organisms, homeostasis, reproduction and genetics, and evolution.
What is the fundamental unit of all living organisms?
A cell is the smallest unit of a living thing. A living thing, whether made of one cell (like bacteria) or many cells (like a human), is called an organism. Thus, cells are the basic building blocks of all organisms.
Why cell is the fundamental unit of life?
Cell: Cell is called the fundamental unit of life. A cell is capable of independent existence and can carry out all the functions which are necessary for a living being. A cell carries out nutrition, respiration, excretion, transportation and reproduction; the way an individual organism does.
What is the meaning of fundamental units?
The fundamental units are the units of the fundamental quantities, as defined by the International System of Units. They are not dependent upon any other units, and all other units are derived from them. In the International System of Units, the fundamental units are: The meter (symbol: m), used to measure length.
What is Work class 9th?
Work is defined as a force acting upon an object to cause a displacement. It is expressed as the product of force and displacement in the direction of force. W=F x s.
How is work related to energy Class 9?
Energy should be transferred to an object in order to move it. This amount of energy transferred by the force to move an object is called work or work done. Thus, the relation between Work and Energy is direct. That is, the difference in the Kinetic energy of an object is work done by an object.
What is power class 9th?
We can define power as the rate of doing work, it is the work done in unit time. The SI unit of power is Watt (W) which is joules per second (J/s).
What is gravitational potential energy write its formula?
The change in gravitational potential energy, ΔPEg, is ΔPEg = mgh, with h being the increase in height and g the acceleration due to gravity. The gravitational potential energy of an object near Earth’s surface is due to its position in the mass-Earth system.
What is the difference between MGH and GmM R?
Use the connection between force and potential energy to determine the general form of gravitational potential energy. U = mgh applies only for a uniform field, so it does not apply here where the field goes as 1/r2. This gives U = -GmM/r, if we define the potential energy to be zero at r = infinity.
Does mass increase with height?
You can think of the energy as being stored in the gravitational field. So your mass doesn’t increase, but the mass of the earth+you system taken as a whole may theoretically increase.
Why does kinetic energy increase with height?
The higher up an object is the greater its gravitational potential energy. As most of this GPE gets changed into kinetic energy, the higher up the object starts from the faster it will be falling when it hits the ground. So a change in gravitational potential energy depends on the height an object moves through.
Is kinetic energy directly proportional to height?
As the height increases, there is an increase in the gravitational potential energy P and a decrease in the kinetic energy K. The kinetic energy K is inversely proportional to the height of the object.
Does kinetic energy depend on height?
For instance, the kinetic energy of the object will be higher if the object is placed at a greater height. Potential energy isn’t transferrable and it depends on the height or distance and mass of the object. (It’s the falling hammer that has kinetic energy.)