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inessss [21]
3 years ago
14

What is the unit of pressure? Why is it called a derived unit?Why has SI system​

Physics
1 answer:
Dovator [93]3 years ago
6 0

Answer:

pascal

Explanation:

its obtained after either division or multiplication

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A uniform electric field of magnitude 4.6 ✕ 104 N/C is perpendicular to a square sheet with sides 3.0 m long. What is the electr
rodikova [14]

Answer:

41.4* 10^4 N.m^2/C

Explanation:

given:

E= 4.6 * 10^4 N/C

electric field is 4.6 * 10^4 N/C and square sheet is perpendicular to electric field so, area of vector is parallel to electric field

then electric flux = ∫ E*n dA

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A spherical balloon has a radius of 6.95 m and is filled with helium. The density of helium is 0.179 kg/m3, and the density of a
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volume of balloon

= 4/3 T R3

= 4/3 x 3.14 x 6.953

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weight of helium gas

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= 1181.58 x 9.8 N

If W be extra weight the uplift can balance

1181.58 × 9.8 + W × 9.8 = 1813.05 * 9.8

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