Students and Teachers Forum
A static electricity is a stationary electric charge, typically produced by friction, which causes sparks or crackling or the attraction of dust or hair. Static electricity is an imbalance of electric charges within or on the surface of a material. .....
The switch from coal-fired power generation and oil-fired heating to natural gas increases the greenhouse effect of energy supply by around 40 percent due to methane emissions, writes the Berlin-based scientists’ network Energy Watch Group .....
Iron is used to make alloy steels like carbon steels with additives such as nickel, chromium, vanadium, tungsten, and manganese. These are used to make bridges, electricity pylons, bicycle chains, .....
here, power of electric bulb (Pb) = 100 watt = 1000/1000 kw time (T) = 8 hours electricity consumed (E) = power(P) * .....
A catalyst which increases the rate of reaction is called positive .....
Big bang, Nebular , tidal etc are all the hypothesis regarding the origin of earth and other planets of the solar system. Each hypothesis has their own uniquesness. Only god theory can be against these .....
Computer viruses usually spread in one of three ways: from removable media; from downloads off the Internet; and from e-mail attachments. .....
Bhuktaman was the first king of Gopal dynasty. Gopal dynasty ruled for 521 .....
a quadrilateral is a polygon with four edges and four vertices or .....
i) Larva stage of silkworm ii) B : thoracic true legs , C = spiracles iii) from larva stage, cocoons can be obtained which are required for production of silk .....
At 21.9 km, the enormous shield volcano Olympus Mons on Mars is the tallest mountain on any planet in the Solar System. For 40 years, following its discovery in 1971, it was the tallest mountain known .....
= 1/(c - d) - (c + d)/(c2 - d2). = 1/(c - d) - (c + d)/(c - d)(c + d). [ Since, a2 - b2 = ( a + b)(a - b).] = [c + d - c - d]/[(c - d)(c + d)] = 0/[(c - d)(c + d)] = .....
Advantages of Network: These are main advantages of Computer Networks:
Central Storage of Data – Files can be stored on a central node (the file server) that can be shared and made available to each and every user in an .....Sin 8A =Sin 2.4A =2 Sin 4A Cos 4A =2 Sin 2.2A Cos 4A = 2.2.Sin 2A Cos 2A Cos 4A =4 Sin 2.2A Cos 2A Cos 4A =4.2Sin A Cos A Cos 2A Cos 4A = 8 Sin A Cos A Cos 2A Cos .....
Plastids are a group of phylogenetically and physiologically-related organelles found in all types of plants and algae. ... One of the maincharacteristics of these organelles is the fact that they have a double membrane. In the cells, plastids are .....
A nebula is an interstellar cloud of dust, hydrogen, helium and other ionized gases. Originally, the term was used to describe any diffuse astronomical object, including galaxies beyond the Milky .....
Helium-2 (diproton) Helium-2 or 2He, also known as a diproton, is an extremely unstable isotope of helium, which consists of two protons without any .....
a³-a²-ab+a+b-1 a²(a-1)-ab+b+a-1 a²(a-1)-b(a-1)+1(a-1) (a²-b+1) .....
Solution: At first, for 3 paisa per rupee 3 for a month P = Rs.3, T = 1/12 year , I = Rs. 3/100 Then R = (I *100)/ P * T = 12% Again, Principal (P) = 125000 Time T = 4 years Rate R = 12% Interest I = PTR/100 = (125000*4*12)/100 = .....
Let the common ratio be x Then, The ratio of distances between two places A and B and B to C is 4:5. The ratio of distances between two places A and B and B to C is 4x:5x. By question , 4x+5x = 72 or, 9x = 72 or, x = 8 So, distance between A to B = .....
Since, weight = mass * gravity gravity is not same everywhere on earth because gravity depends upon radius of the earth. And radius of the earth is not uniform everywhere. so, weight is different from place to .....
Types of Forces: 1.Contact Force : Contact Force Forces which act on a body either directly or through a medium are called contact forces. The examples of contact forces are a Muscular force, mechanical force and Frictional .....
There are two things to think about here. Let's take the easy one first and ask "why is the daytime sky blue here on Earth?" That is a question we can answer. The daytime sky is blue because light from the nearby Sun hits molecules in .....
Volume V = 50cm * 30cm * 20 cm = 30000cm3 Area A = 50cm * 30 cm = 1500cm2 = 1500/10000 = 0.15m2 mass m = 30 kg gravity g = 10 m/s2 Force F = m * g = 30 * 10 = 300 N Pressure P = F / A = 300 / 0.15 = 2000 .....
Dry ice is formed. The most common use of dry ice is to preserve food, using non-cyclic refrigeration. It is frequently used to package items that must remain cold or frozen, such as ice cream or .....
Here, 5x-3 ⨉ 32x-8 = 225 or, (5x / 53) ⨉ (32x / 38) = 225 [ Since, xm - .....
Stars are formed when a nebulae or collapsing clouds mainly composed of hydrogen and dust particles collapse under its own gravity and form a cellestial body. This body is so dense that the atoms are closer than 0.8 fm and are attracted by the .....
Let the number be '10x + y' Therefore, the number obtained by reversing it is '10y + x' Now, from given condition, (10x + y) + (10y + x) = 121 or, 11x + 11y = 121 or, x + y = 11 ..... (i) Also, 10x + y - ( 10 y + x) = .....
A permanent magnet cannot be used in electric bell, because - - The electric bell's hammer is attracted towards the bell's main body by continuous on and off sequence of the electromagnet attached in the bell's hammer. This off and on .....
An allele is a variant form of a given gene.Sometimes, the presence of different alleles of the same gene can result in different observable phenotypic traits, such as different pigmentation. A notable example of this trait of color variation is .....
Electricity is a form of energy. Electricity is the flow of electrons. Electricity is the presence and flow of electric charge (electrons) .....
Planets are those heavenly bodies which revolve around the sun in their own orbit. There are eight planets in the solar system. They are : mercury, venus, earth, mars, jupiter, uranus, saturn and .....
Pascals Law Definition: Pressure applied to liquid enclosed in vessel is transmitted equaly all direction perpendicularly. Instruement based on Pascal's Law are Hydraulic lift Hydraulic break Hydraulic Press .....
A medical device that is used to inject fluid into, or withdraw fluid from, the body. A medical syringe consists of a needle attached to a hollow cylinder that is fitted with a sliding plunger. The air pressure plays an .....
Carrying capacity is defined as the maximum number of individuals of a population that the environment can support. Estimates put Earth's carrying capacity at anywhere .....
The village of Dingboche located in the Solukhumbu district is said to be the coldest place in .....
Herbs are small plants that have a fleshy or juicy stem when they are young. The stems of some herbs develop hard, woody tissue when they grow old. Most herbs are perennials. .....
This is because the electrons in gold have less resistance and can move more easily than the electrons in .....
The full form of www is World Wide .....
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For Probability of all boys, the probability is:
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