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Explain genes.

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Tutorialspoint

Updated on 10-Oct-2022 09:38:17

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Gene is a physical and functional unit of heredity which is made up of DNA. Every gene comprises of the particular set of instructions either for protein-coding or for a particular function. Hence, genes are responsible for heredity. Each individual has two copies of each gene out of this one ... Read More

Define: Wind Current.

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Tutorialspoint

Updated on 10-Oct-2022 09:38:17

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Wind currents occur due to the combined effect of the forces of inertia, turbulent viscosity, pressure gradient, deflecting force of the earth's rotation, and so on, of the surface waters of the oceans and seas originating from the action of the wind on the surface of the water 

What is the meaning of grease and dirt?

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Tutorialspoint

Updated on 10-Oct-2022 09:38:17

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Grease is a lubricating material. it can be of different types, like in oil or fat. Generally black in colour. It stains the clothes and hands too.Both Grease and Dirt are unwanted substances which generally stains the clothes and body.

What is the first acid discovered?

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Tutorialspoint

Updated on 10-Oct-2022 09:38:17

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Albert Hofmann first discovered Lysergic Diethylamide Acid or LSD in 1938.

In a regular polygon each interior is thrice the exterior angle then number sides have?

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Tutorialspoint

Updated on 10-Oct-2022 09:38:17

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Given:  In a regular polygon each interior is thrice the exterior angleTo do: Find the number of sides.Solution:Let the Exterior angle be 'a' Interior angle = 3a We know that, Exterior angle $+$ Interior angle = 180 => $a + 3a = 180$ => $4a = 180$ => $a = 45°$ ... Read More

Explain the Ionic Compound.

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Tutorialspoint

Updated on 10-Oct-2022 09:38:17

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An ionic compound is a compound composed of ions which are held together by electrostatic forces termed as ionic bonding. The compound is neutral overall but consists of positively charged ions called cations and negatively charged ions called anions.Example- sodium chloride, it consists of Na+ cations and Cl- anions.Read More

Why laboratory thermometer is based on alcohol?

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Tutorialspoint

Updated on 10-Oct-2022 09:38:17

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Alcohol is used in a laboratory thermometer instead of a clinical thermometer because alcohol has a very low freezing point in comparison to the Mercury. It is used in a cool place or region. The freezing point is the temperature at which a liquid starts changing into solid-state.

Give examples which indicate that nylon fibres are very strong.

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Tutorialspoint

Updated on 10-Oct-2022 09:38:17

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Nylon is used in making seat belts, fishing nets and tyre cords.Nylon is used in making sports accessories like rackets.Thus, from these examples, we can say that nylon is a strong fibre.

Why does earth have its own magnetic fields ?

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Tutorialspoint

Updated on 10-Oct-2022 09:38:17

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The magnetic field of Earth is caused by currents of electricity that flow in the molten core. These currents are hundreds of miles wide and flow at thousands of miles per hour as the earth rotates. The powerful magnetic field passes out through the core of the earth, passes through the crust and enters space. Read More

A, B, C can do a work in 15hr, 12hr, 20hr respectively. At 4.00 pm, they started working together and after working for 2hr, a left the work and b left 2hr before completion of the work in what time the whole work will be completed.

Tutorialspoint

Tutorialspoint

Updated on 10-Oct-2022 09:38:17

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The amount of work completed in 2 hours is 2/15 +2/12 + 2/20 = (8 + 10 + 6) /60 = 24/60 = 2/5There remains 3/5 of work after 2 hours.Let the work takes 'h' hours to get completed after 2 hours of working together. And also given that 'a' ... Read More

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