SSC (English Medium) १० वीं कक्षा - Maharashtra State Board Question Bank Solutions for Science and Technology 1

Complete the following equations:

The orbit of a satellite is exactly 35780 km above the earth's surface and its tangential velocity is 3.08 km/s.

How much time the satellite will take to complete one revolution around the earth?

(Radius of earth = 6400 km.)

The element eka-silicon in Mendeleev’s periodic table is known as ………… in the modern periodic table.

A person has sour taste in the mouth and a burning sensation of the stomach.

1. What is he suffering from?
2. Why does it happen?
3. What substance is used as a remedy?

State the rule to determine the direction of a magnetic field produced around a straight conductor-carrying current.

Taking into consideration the relationship in the first pair, complete the second pair

2H₂ + O₂ → 2H₂O :Combination Reaction :: 2HgO → 2Hg + O₂:_________

Which substance when used with butter having butyric acid can cure acidity?

(A) Lime water

(B) Soda water

(C) Calcium carbonate

(D) Lime juice

State the right-hand thumb rule.

Rewrite the following statements by selecting the correct options:
\[\ce{CaCO3 ->[\Delta] CaO + CO2 ^}\] is a __________ reaction.

What is a solenoid?

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 \[\sqrt{8}\] T.

Give a scientific reason.

When the gas formed on heating limestone is passed through freshly prepared lime water, the lime water turns milky.

Fill in the blank and explain the statement with reasoning:

The initial velocity (during launching) of the Managalyaan, must be greater than ______ of the earth.

State with reasons whether the sentence is  true or false.

If a spacecraft has to be sent away from the influence of earth’s gravitational field, its velocity must be less than the escape velocity.

State with reason whether the sentence is true or false.

The escape velocity on the moon is less than that on the earth.

State with reasons whether the sentence is  true or false .

 A satellite needs a specific velocity to revolve in a specific orbit.

State with reasons whether the sentence is  true or false .

 If the height of the orbit of a satellite increases, its velocity must also increase.

What is meant by satellite launch vehicles?

Why it is beneficial to use satellite launch vehicles made of more than one stage?