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The correct option is: (d) 65%

The correct option is: (b) needles are inserted into particular parts of the body to relieve pain

Explanation:

 Acupuncture is the stimulation of specific acupuncture points along the skin of the body using thin needles.

The correct option is: (b) 1 and 3

Explanation:

Haemocyanin contains copper

The correct option is: (c) several million cells

(b) Both A and R are true but R is not correct explanation of A

The correct option:(b) Pace-maker

(a) Both A and R are true and R is the correct explanation of A

The current option is: (d) Urochrome

Explanation:

Urochrome is the chemical which is responsible for the yellow colour of urine.

The correct option is: (c) Uracil

Explanation:

In RNA, thymine is replaced by uracil. Thus Adenine will bind to uracil of RNA.

The correct option is: (c) 3 4 1 2

(d) A is false but R is true

Explanation:

Electron affinity generally decreases from top to bottom in a group.

Atomic radii increases from top to bottom as energy levels increases because as we move down a group number of electrons increases.

The World Day for Safety and Health at Work is an annual international campaign to promote safe, healthy and decent work. It is held on 28 April and has been observed by the International Labour Organization (ILO) since 2003.

The World Day celebration on 28 April 2019 will be only the beginning of worldwide events and activities to continue throughout the rest of the year.

A national occupational safety and health culture is one in which the right to a safe and healthy working environment is respected at all levels, where governments, employers and workers actively participate in securing a safe and healthy working environment through a system of defined rights, responsibilities and duties, and where the highest priority is accorded to the principle of prevention.

Large-scale industries involve huge investments, professional management and a large force of skilled and unskilled labour. Big power-driven machines are used with considerable automation. These industries are generally established at places where raw materials, cheap transportation, sources of power, plenty of labour and market are easily available. Industries producing iron and steel, petrochemicals, cement, railway engines and coaches, automobiles, textiles, etc. are examples of large-scale industries.

Limitations of ‘Magazines’ as a media of advertising: 

(i) Advertising in magazines is costlier. 

(ii) The number of people to whom the advertisements reach through magazines is small in comparison to newspapers. 

(iii) The advertisement material are given much in advance, hence last minute change is not possible. 

Advertising: 

Advertising consists of all activities involved in presenting a sponsored message regarding a product, service or an idea. 

Modes of Electronic media of advertising:

(i) Radio 

(ii) Television 

(iii) Internet 

Characteristics of Departmental Stores: 

(i) Departmental stores are generally located at the main commercial centres of the cities and towns. Therefore customers from different locations can easily come to buy goods according to their convenience. 

(ii) The size of the stores is very large and divided into many departments or counters. 

(iii) Each department deals with a particular type of goods. 

(iv) The management and control of all departments is centralized. 

(v) The departmental stores allow customers to enjoy shopping. It enables the customers to buy everything under one roof. 

(vi) Facilities such as restaurant, rest rooms, telephone, ATM (Automated Teller Machine) etc. are also made available to customers inside the stores. 

(vii) These stores allow customers to buy goods against a credit or debit card. 

(viii) Customers may also avail of free home delivery facility from these stores.

Tele-Shopping:

Buying of goods by placing orders with the sellers using telephones is called Tele-shopping. It is a kind of non-store retailing wherein the sellers contact the prospective buyers through telephone and persuade them to buy their products. In some cases they advertise their products on television or other media and also make live demonstration of the product.

 Advantages of tele-shopping: 

(i) It saves time, money and efforts in placing a written order to buy the goods. 

(ii) It is a convenient method of shopping for people who are busy and do not have much time for shopping. 

(iii) It eliminates the role of middlemen in the process of distribution. 

(iv) Buyers can inquire about the terms and conditions of sale, mode of payment, packaging etc. from the sellers without visiting the seller’s place. 

The correct answer is  

https://bit.ly/2WlsC9J

Steps:

1. Determine the outcome of your code. What is the specific problem you want to solve or the task you want it to accomplish? Once you have a solid idea of what you're aiming to accomplish, you can determine the steps it will take to get there.

2. Decide on a starting point. Finding your starting and ending point are crucial to listing the steps of the process. To determine a starting point, determine the answers to these questions:

• What data/inputs are available?
• Where is that data located?
• What formulas are applicable to the issue at hand?
• What are the rules to working with the available data?
• How do the data values relate to each other?

3. Find the ending point of the algorithm. As with the starting point, you can find the end point of your algorithm by focusing on these questions:

• What facts will we learn from the process?
• What changes from the start to the end?
• What will be added or no longer exist?

4. List the steps from start to finish. Start with broad steps. To use a real-world example, let's say your goal is to have lasagna for dinner. You've determined that the starting point is to find a recipe, and that the end result is that you'll have a lasagna fully cooked and ready to eat by 7 PM. Your steps may look something like this:

• Search for a recipe online.
• Look for the ingredients you already have in the kitchen.
• Make a list of ingredients you'll need from the store.
• Buy the missing ingredients.
• Return home.
• Prepare the lasagna.
• Remove the lasagna from the oven.

5. Determine how you will accomplish each step. Now that you have a step-by-step outline, it's time to think about how you might code each step. Which language will you use? What resources are available? What's the most efficient way to accomplish each step in that language? Incorporate some of that code into your algorithm. Expand each step until you've detailed the entire process.

• For example, the first step in our lasagna algorithm is Search for a recipe online. But what is involved in this search? Be specific. For example:
  • Turn on your computer.
    • Check to make sure you're connected to the internet. Connect to the internet if you aren't already.
  • Open a web browser.
  • Enter your search terms.
  • Click a recipe link.
  • Determine whether the recipe meets your needs.
    • Filter out recipes that aren't vegetarian.
    • Make sure the recipe makes at least 5 servings.
  • Repeat some of these steps until you find the right recipe.
• Consider the resources at your disposal, such as the capabilities of the system you're developing a program for. In the case of lasagna, we assume the person making the lasagna knows how to search the internet, operate an oven, etc.

6. Review the algorithm. Now that you've written your algorithm, it's time to evaluate the process. Your algorithm is designed to accomplish something specific, and you'll need it to start writing your program. Ask yourself the following questions, and address each as necessary:

• Does the algorithm solve the problem/accomplish the task?
• Does it have clearly defined inputs and outputs?
• Should the end goal be redefined to be more general? More specific?
• Can any of the steps be simplified?
• Is the algorithm guaranteed to end with the correct result?

Explanation: 

The maximum power transfer occurs when load resistance equals the Thevenin's resistance.

 Explanation: 

P_max = v*i = i*R*i = i2RL = (V_Th /(R_Th+R_L))2*R_L. 

Max power occurs when R_L= R_Th. 4.

A ray is a believed to be coherent light and focused in nature, such as polarized light.  A beam is a light which is not focused. This is just the general definition, as ray and beam are not quantitatively defined.

An incident ray is a ray of light that is pointing towards and striking a surface.

If an object is placed in front of a plane mirror, then the right side of the object appears to be the left side of the image, and the left side of the object appears to be the right side of its image. This change of sides of an object and its mirror image is called lateral inversion.

We know that, sum of two complementary angles = 90°

∴ (2x – 7) + (x + 4) = 90°

2x - 7 + x + 4 = 90°

⇒ 2x + x – 7 + 4 = 90°

⇒ 3x – 3 = 90°

⇒ 3x = 90 + 3

⇒ 3x = 93

⇒ x = 93/3

x = 31

1 - 3x -3y -4(x+y)²

= 4 -3 -3x -3y -4(x+y)²

= 4(1-(x+y)² ) -3(1+x+y)

= 4(1²-(x+y)² ) -3(1+x+y)

= 4{(1-x-y)(1+x+y)}-3(1+x+y)

= (1+x+y) {4(1-x-y)-3} (1+x+y) {4-4x-4y-3)

⇒ (1+x+y) (1-4x-4y)

A Standard Hydrogen Electrode (SHE) is an electrode that scientists use for reference on all half-cell potential reactions. The value of the standard electrode potential is zero, which forms the basis one needs to calculate cell potentials using different electrodes or different concentrations

Consider a series of numbers composed of only digits 4 and 7. The first few numbers in the series are 4, 7, 44, 47, 74, 77, 444, etc. Given a number constructed by 4, 7 digits only, we need to find the position of this number in this series.

1. Metals have one to three electrons in their outer shell, whereas non-metals have four to eight electrons.  

2. Metals are malleable, which means they can be beaten to thin sheets. On the other hand, non-metals are very brittle.  

3. Metals have a high to moderate density, whereas non-metals have low to moderate density.  

4. Metals are opaque and non-metals are transparent.  

5. Metals are present in solid form at room temperature, and non-metals are present in solid and liquid forms at room temperature.  

6. Unlike non-metals, metals are ductile, which means they can be stretched into wires.  

7. Metals have a metallic luster, while non-metals do not. 

8. Metals tend to lose their valence electrons, but non-metals share or gain valence electrons.

Water is a compound because of the following reasons:  

• It is composed of two different elements, hydrogen and oxygen which cannot be separated by physical methods. They can be separated only by electrolysis. 
• The physical and chemical properties of hydrogen and oxygen are entirely different from the properties of water.

Cotton, jute, hemp and natural silk are the four major fibre crops grown in India.

The first three are derived from the crops grown in the soil, the latter is obtained from cocoons of the silkworms fed on green leaves specially mulberry.

1 km = 1000 m, 1 m = 100 cm

4.57 km = 4.57 × 1000 × 100 = 457000 cm

Since RF = Distance on the map in cm

RF scale = 1 / 457000 = 1:457000

Modern agriculture increases global political stability by making more food available, improving its quality and making it accessible to more people. development of a robust, rules-based trading system has been extremely important in improving food distribution and increasing accessibility in food-deficit areas.

The most and the important disadvantage of the shifting cultivation is to cut the Forest and the trees that are helpful for the soil erosion and that is very helpful for nature.Shifting agriculture is a wasteful method of cultivation because it causes forest loss. It is one of the most causes of deforestation. It is the greatest enemy of the forest.

The correct option is: (c) 1, 2, 3 and 4

Explanation:

The Intelligent Flight Control System (IFCS) is a next-generation flight control system designed to provide increased safety for the crew and passengers. It was developed by NASA and IFCS tested it in NF–15B. Generation 1 IFCS flight tests conducted in 2003.

the correct option is: (d) 1, 2 and 3

Explanation: 

Multiple Independent Re–entry Vehicle (MIRV) is a ballistic missile payload or "bus" of a ballistic missile. It is capable of being aimed to hit one of a group of targets. A unitary warhead is a single warhead on a single missile Multiple re-entry vehicle (MRV) is an intermediate case in which the MRV missile carries several reentry vehicles, which can be dispersed but not individually aimed.

(b) the gravitational attraction of the earth on the satellite.

An orbiting satellite is a projectile, that the only force acting upon an orbiting satellite is the force of gravity. The force of gravity also accelerates it towards the earth. But the earth's round shape prevents it to fall on ground and if the satellite is in more than 8000 m/s speed it also contributes to the maintenance of motion in a particular orbit or elliptical path.

(d) all the four

The main objectives of the New Science and Technology Policy are optimal utilisation of existing physical and knowledge resources, development of innovative technologies and management of intellectual property.

(d) A space-craft with a mechanism which would check asteroids from hitting the earth.

A 'Gravity tractor' (GT) is a spacecraft with a mechanism that can deflect another object in space without physically contacting it. It will use only its gravitational field to transmit the required impulse. It can affect a potentially hazardous asteroid that might hit earth.

(a) Both A and R are true and R is the correct explanation of A.

Space-based solar power (SBSP) is considered to be made a national goal, because its supply is 99% uninterrupted throughout the year, besides the enormity of energy availability.

The correct option is: (b) 4 3 1 2

Explanation:

Arihant is a class of nuclear–powered ballistic missile submarine.

AWACS, abbreviation of Airborne Warning and Control System is a mobile, long–range surveillance and control centre for air defence, developed by the U.S. Air Force, is mounted on Boeing 707 aircraft.

Atlas – Centaur is an American expendable launch system. It is the first production rocket stage to use cryogenic propellant. 

Nag is a third generation fire–and–forget" anti-tank missile of India.

The correct option is: (a) 3 2 4 1

Explanation:

Indian Space Research Organisation (ISRO) is headquartered in Bengaluru. The Inter-University Centre for Astronomy and Astrophysics (IUCAA) is located in Pune, India.

Inter-University Accelerator Centre (IUAC) is an autonomous research facility of University Grants Commission which is based in New Delhi. Vikram Sarabhai Space Centre (VSSC) is a major space research centre of the Indian Space Research Organisation, focusing on rocket and space vehicles is located in Thiruvananthapuram, Kerala.

The correct option is: (c) 1, 2 and 4

Explanation:

Heat is a form of energy. Heat can be reflected by mirror. Heat can’t pass through vacuum.

The higher the MPS, the lower is the value of multiplier.

The higher the MPS, the lower is the value of multiplier.

Aggregate Demand refers to the value of final goods and services which all sectors of an economy are planning to buy during a year. 

Components :

(a) Private consumption expenditure

(b) Government consumption expenditure

(c) Investment expenditure

(d) Net Exports

Aggregate Demand implies the total demand of final goods and services by all the people in an economy. It expresses the total demand in terms of money. In this manner, it can be defined as the actual aggregate expenditure incurred by all the people in an economy on different goods and services.

भारत की जनसंख्या 1,359,843,564 करोड़ है।

Simple harmonic motion is any motion where a restoring force is applied that is proportional to the displacement and in the opposite direction of that displacement. Or in other words, the more you pull it one way, the more it wants to return to the middle. The classic example of this is a mass on a spring, because the more the mass stretches it, the more it feels a tug back towards the middle. A mass on a spring can be vertical, in which case gravity is involved, or horizontal on a smooth tabletop.

EXAMPLES:  

1. simple pendulum 

2. mass spring system 

3. a steel ruler clamped to a bench oscillates when its free end is displaced sideways. 

4. a steel ball rolling in a curved dish 

5. a swing 

Electrochemistry is the subdiscipline of chemistry that deals with the study of the relationship between electrical energy and chemical changes. Chemical reactions that involve the input or generation of electric currents are called electrochemical reactions. Such reactions are broadly classified into two categories:

1. Production of chemical change by electrical energy i.e. the phenomenon of electrolysis
2. Conversion of chemical energy into electrical energy. i.e., the generation of electricity by spontaneous redox reactions.

The correct option is: (d) 4 only

Explanation:

For a given point on the surface of earth, g decreases as w increases. Hence, body weighs less at the equator than at the poles also equatorial diameter is greater than polar diameter, 

so according to g = GM ,/ R^2, value of g decreases.