Monday 31 July 2023

S.S.C 2024 most important questions science 1 c.h.p 1 gravitation

 S.S.C 2024 most important questions 

science 1 c.h.p 1 gravitation

M.C.Q

The minimum velocity of a spacecraft to escape from gravitational force is ………

The value of gravitational acceleration (g) is ………..

The ……………..force is much weaker than other forces in nature.

The value of universal gravitational constant (G) in SI unit is…………

The gravitational force between two bodies is directly proportional to the product of the masses of those bodies and is ……….of the distance between them.

The square of its period of revolution around the sun is directly proportional to the ……….. Of the mean distance of a planet from the sun.

The orbit of a planet revolving around a star is ……

A ……. Is necessary to change the speed as well as the direction of motion of an object.

The value of gravitational acceleration (g) is …………at the equator

The free fall of an object is possible only in…….

The weight of any object on the moon is nearly …………of the weight of the earth

A person weighs 60 N on earth. His weight on the moon will be……

Newton presented the laws of motion, equations of motion and theory of gravitation in his book…….

Laws of planetary motion were discovered by ……………………….

True or false

If the distance between two masses is doubled, the gravitational force between them becomes less than the previous force.

The CGS unit of G is dyne.cm

The value of gravitational acceleration with the centre of the earth is zero.

The value of g is highest at the equator.

The value of G varies from place to place.

As it rises above the earth's surface, its value increases.

The speed of release of an object does not depend on the mass of the object.

Mass is a qualitative measure of the inertia of an object.

Distinguish between

Mass and weight

Give scientific reasons

The weight of the object changes from place to place while the mass is constant

Answer the following

Explain why value of g changes if we go inside the earth

If mass of 2 bodies are m1 and m2 respectively and if distance between them is 3d then force F =

State the 3 planetary laws of KEPLER or of the given figure showing orbit of a planet write the 3 laws related to it

Will the weight of an object on earth will be same as that on mars? Why

What is Free Fall, acceleration due to gravity, escape velocity and centripetal force?

A stone thrown vertically upwards with an initial velocity u reaches a height h before coming down show that the time taken to go up is same as time taken to come down.

Let the period of revolution of a planet at a distance R from a star be T. Prove that if it was at a distance of 2R from the star, its period of revolution will be √8T.

Tuesday 4 July 2023

EVS Project work on conducting energy audit for energy conservation

 

E.V.S Project work on conducting energy audit for energy conservation


Introduction:

An energy audit is an analysis of a facility, indicating how and where

that facility can reduce energy consumption and save energy costs. Its

insight to energy efficiency and conservation can lead to significant

savings on the utility bill of houses, institutions, companies etc. and

suggest the energy conservation techniques. Hence to put more light in

this conservation technique I have selected this topic.

Energy audit refers to examination and verification of energy

consumption in the form of electricity, gas and other forms of fuel energy

used in households, industries, institutes, schools etc. It can be considered

as the first step towards knowing how energy is being used in a given

facility. It indicates the ways in which various forms of energy are being

Used and quantifies energy use according to different functions.

Energy Audit is an integral part of Green auditing. Green Audit is an

unique process of systematic identification, quantification, recording,

reporting and analysis of components of environmental diversity of

various establishments. It allows us to know the uses of available

resources i.e. Energy, Water quality, Built-up Space, Air quality in the

organization. It was initiated in 1970 with the motive of inspecting the

work conducted within the organizations, which can cause risk to

inhabitants and environment.Rapid urbanization and economic development at local, regional and global level has led to several environmental and ecological crisis.

Hence It becomes essential to adopt the system of environmental audit for institutes, organizations etc. It will lead to sustainable development.In the given research I have made an attempt to conduct the energy audit of my house.

Importance of the Project:

Energy conservation means using energy more efficiently and less wastefully. Conservation of energy is an important energy resource because a Unit of energy saved is as good as a unit of energy generated. It helps you to lower energy bills. It helps you to increase the life span of the equipment. Helps in understanding energy consumption pattern of the Institute and house. By identifying energy wastage areas, saving energy and using renewable energy sources, the institute can become more energy Efficient. Thus Energy audit is a small step towards preventing global warming as well as saving the valuable conventional energy resource

Objectives:

To create awareness towards wastage of electrical energy.

To make statistical analysis of electrical energy usage in order to reduce unnecessary consumption.

To sensitize the community about lawful consumption of electrical energy in their houses and work places.

To study about alternatives to cut down the cost as well as reduce the energy loss.

To find the difference in the electricity bills in order to analyses the impact of alternatives used in conserving electricity.

To learn electric energy consumption pattern and its calculation. 

Methodology

I am doing my research project by applying the survey method in which I have used Interview method to do the analysis of my research have selected my own house to conduct the energy audit have compared the electricity bills of 2 months (January & March respectively) in order to find the difference in the electricity consumption. This difference has helped me to find the reduction in electricity consumption due to the use of alternatives. In interview method I have taken interview of two experts, an architecture and an electrical engineer to put light on my research and to gain in-depth knowledge about electricity consumption its conservation. During interview session I have asked 5 questions each to the experts

Name of the Expert & List of questions asked.

Mr. Rajendra Baburao (Electrical Engineer-Reliance)

1. What is the effect of Wattage difference of same appliances on electricity consumption?

2. Can replacement of a part of electrical appliances help to reduce electricity consumption?

3. Is there any user guide available by which we can use electrical energy more wisely?

4. Is there any specific electrical wires available in the market which helps in reducing the electricity consumption?

5. How to calculate electrical energy consumption of appliances?

Observations:




Analysis:



Calculation of electricity consumption was done in following way:

DATA: 1kWh=1unit

Where, W stands for Wattage which means operating power of electrical

Appliances.

Convert Wattage into Watt-hour = Watt/60 mins

Convert Watt-hour into KWh = Watthr/1000

FOR EXAMPLE: CALCULATION OF ELECTRICAL CONSUMPTION BY TUBE LIGHTS.

Wattage of tube light = 40 W

No. of tube lights = 6 K + B + H

Hrs. of Consumption/day = 8 (On an average) {(4+4+8+8+12+12)/6 = 8}

WattHr./day = 40 X 6 X 8 = 1920

KiloWatt Hr. = 1920/1000 = 1.920

Kilowatt Hr. / month = 1.920 X 31 = 59.52 units

Resultant and Conclusion

After understanding the application of Energy audit in energy Conservation, I have taken an initiative to conduct an energy Audit to calculate and compare the electricity usage at my own House for the month of January and March have reduced the usage of appliances with respect to numbers And hours of operation. Based on the results obtained it has been noticed that without Taking much effort I could save 200 units of electricity. I have consciously made an effort for reducing the hours of Operations and number of appliances like Geyser, Fan, and tube light etc. On regular basis. Along with the conservation of energy this initiative has also given me the financial benefit where I could save around 600 rupees.

Monday 3 July 2023

EVS Projects List

E.V.S  Projects List ( All Projects )


Click on below links to watch & download 👇

Visited historic place & environmental issues over there ðŸ‘ˆ( click here )

Project work on global warming ðŸ‘ˆ( click here )

Project work on organic farming ðŸ‘ˆ( click here )

Project work on solar energy  ðŸ‘ˆ( click here )

Project work on water pollution ðŸ‘ˆ( click here ) 

Project work on biodiversity 👈(click here)

Project work on conservation of natural resources 👈(click here)

Project work on airpollution 👈(click here)