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AysviL [449]
2 years ago
13

Iron mining in south africa

Physics
1 answer:
Oliga [24]2 years ago
7 0

Answer:

<h3>In 2021, South Africa's production of iron ore amounted to an estimated 61 million metric tons. South Africa is one of the world's largest producers of iron ore. As of 2021, South Africa was the ninth-largest iron ore producing country in the world.</h3>
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A pendulum is transported from sea-level, where the acceleration due to gravity g is 9.80 m/s2, to the bottom of Death Valley. A
tatyana61 [14]

Answer: the value of g in Death Valley is 10.417 m/s²

Explanation:

Given that;

acceleration due to gravity at the point is g = 9.8 m/s²

Lets say the acceleration due to gravity at the bottom of Death valley is g'

as the period of the pendulum is decreased by 3.00%

T' = 0.97 T  

T is the period of the pendulum at sea level  and T' is the period of the pendulum at bottom of Death valley

therefore from the relation

T = 2π√(l/g)

g'/g = T²/T'²

g' = (T²/ (0.97T)²)g

g' = 1.063g

g' = 10.417 m/s²

therefore the value of g in Death Valley is 10.417 m/s²

7 0
3 years ago
A hiker walks 20 Km towards the North, then 15 Km Southwards, then 10 Km Eastwards, and finally 12 Km at 30º due East. What is t
Naily [24]

Answer:

Explanation:

We shall represent all displacements in vector form , in terms of i and j . I represents unit displacement towards east and j represents unit displacement in north direction .

First displacement D₁ = 20 j

second displacement D₂ = -15 j

Third displacement D₃ = 10 i

Fourth displacement D₄ = 12 cos30 i + 12 sin30 j  [ 12 cos 30 is displacement towards east and 12 sin30 is displacement towards north ]

Total displacement = 20 j - 15 j + 10 i + 12 cos30 i + 12 sin30 j

= 5 j + 10 i + 10.4 i + 6 j

= 20.4 i + 11 j

Magnitude of displacement = √ ( 20.4² + 11² )

= √ ( 416.16 + 121)

= √ 537.16

= 23.17 m

5 0
3 years ago
20.0 m [N] - 15 m [S20degreesE]
denis-greek [22]

Answer:

thank for making me give up on life

Explanation:

I thought the stuff I had was hard wth is even that

3 0
3 years ago
The photo shows a swimmer pushing off the side of a pool
skelet666 [1.2K]

Answer:

Every action has an equal and opposite reaction.

Explanation:

6 0
3 years ago
Read 2 more answers
Help help help help help
user100 [1]

I think it is C in my personal opinion

8 0
3 years ago
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