Question

Q.6 Long answer type question- (Any 2)
(5) What is pressure? SI Units?
(6) Explain the external structure of the earth.
(7) Explain periodic motion?​

Answer 1

Answer:

(1)Pressure is the amount of force applied perpendicular to the surface of an object per unit area and the for it is p (or P). The SI unit for pressure is the pascal (Pa), equal to one newton per square metre.

(2)The Earth has an outer solid layer called the crust, a highly viscous layer called the mantle, a liquid layer that is the outer part of the core, called the outer core, and a solid center called the inner core. Between the Earth's crust and the mantle is a boundary called the moho.

(3)Periodic motion, in physics, motion repeated in equal intervals of time. Periodic motion is performed, for example, by a rocking chair, a bouncing ball, a vibrating tuning fork, a swing in motion, the Earth in its orbit around the Sun, and a water wave.

Answer 2

Answer:

5) What is Pressure? SI unit?

Ans:

• Pressure is defined to be the amount of force exerted per area. So to create a large amount of pressure, you can either exert a large force or exert a force over a small area (or do both).
• Pressure is measured in Pascals.
• One Pascal = One Newton per square meter.

7) Explain Periodic Motion.

Ans:

• Periodic motion, in physics, motion repeated in equal intervals of time. Periodic motion is performed, for example, by a rocking chair, a bouncing ball, a vibrating tuning fork, a swing in motion, the Earth in its orbit around the Sun, and a water wave.

Explanation:

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