मराठी
तामिळनाडू बोर्ड ऑफ सेकेंडरी एज्युकेशनएस.एस.एल.सी. (इंग्रजी माध्यम) इयत्ता ८

Consider the statement given below and choose the correct option. Assertion: Broad straps are used in bags. Reason: Broad straps last for long.

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प्रश्न

Consider the statement given below and choose the correct option.

Assertion: Broad straps are used in bags.

Reason: Broad straps last for long.

पर्याय

  • Both assertion and reason are true and reason is the correct explanation of assertion.

  • Both assertion and reason are true, but the reason is not the correct explanation of assertion.

  • Assertion is true, but reason is false.

  • Both assertion and reason are false.

MCQ
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उत्तर

Both assertion and reason are true, but the reason is not the correct explanation of assertion.

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पाठ 2: Force and Pressure - Exercises [पृष्ठ २०]

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सामाचीर कलवी Science [English] Class 8 TN Board
पाठ 2 Force and Pressure
Exercises | Q VII. 2. | पृष्ठ २०

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A 50 kg girl wearing high heel shoes balances on a single heel. The heel is circular with a diameter 1.0 cm. What is the pressure exerted by the heel on the horizontal floor?


Two vessels have the same base area but different shapes. The first vessel takes twice the volume of water that the second vessel requires to fill up to a particular common height. Is the force exerted by the water on the base of the vessel the same in the two cases? If so, why do the vessels filled with water to that same height give different readings on a weighing scale?


A plane is in level flight at a constant speed and each of its two wings has an area of 25 m2. If the speed of the air is 180 km/h over the lower wing and 234 km/h over the upper wing surface, determine the plane’s mass. (Take air density to be 1 kg m–3).


Multiple Choice Question.

A hydraulic lift is designed to lift heavy objects of maximum mass 2000 kg. The area of cross-section of piston carrying the load is 2.25 × 10-2 m2. What is the maximum pressure the smaller piston would have to bear?


Why dams are made stronger and thicker at the bottom than at the top?


What is an Artisan aquifer?


The pressure in mines is ______ than the sea level.


Define thrust.


Pressure is a scalar quantity because ______.

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  2. it is the ratio of the magnitude of the force to area.
  3. it is the ratio of the component of the force normal to the area.
  4. it does not depend on the size of the area chosen.

Iceberg floats in water with part of it submerged. What is the fraction of the volume of iceberg submerged if the density of ice is ρi = 0.917 g cm–3?


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