Question

A. Answer in one word.
1. A physical quantity whose SI unit is pascal
2. The normal force acting on a surface
3. The envelop of air up to a height of about 300 km around the earth
4. The St unit of moment of force
5. Thrust per unit area ​

Answer 1

Answer:

1.pressure

2.thrust

3.atmosphere

4.newton meter

5.pressure

Explanation:

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Answer 2

Answer:

1. Unit of: Pressure or stressNamed after: Blaise PascalSI base units: kg⋅m−1⋅s−
2. Normal force is defined as the force that a surface exerts on an object. If the object is at rest, net force on the object is equal to zero; therefore, the downward force (weight) must be equal to the upward force (normal force). Since weight acts in the downward direction it will be negative.
3. The SI unit for moment is the newton meter (kgm²/s²).
4. As we know, thrust is a force and unit of force is newton and for unit area is meter square. So, thrust/unit area gives Newton/meter square which is the formula for pressure.

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