How long have scientists been recording the strength of the Earth's magnetic field?

2 answers:

7 0

Since 1840 we have been accurately enough to tell how the magnetic feild works, every 300,000 years it flips that hasn't occurred for 800,000 years though, hope this helps.<span />

jenyasd209 [6]3 years ago

7 0

Explanation:

The strength of the magnetic field was first measured in 1835 by Carl Friedrich Gauss and has been measured numerous times since then, showing a relative decay of 10% in the last 150 years. Currently, satellites use magnetometers to probe the three-dimensional structure of the Earth's magnetic field.

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A load of 54 N attached to a spring that ishanging vertically stretches the spring 0.15 m.What is the spring constant?Answer in

beks73 [17]

Answer:

300 N/m

Explanation:

given,

Load attached to the spring, W = 54 N

length of stretch of the spring, x = 0.15 m

spring constant= ?

Force applied on the spring is calculated by the equation

F = k x

where k is the spring constant

x is the displacement of the spring due to applied load

now,

54 = k × 0.15

$k = \dfrac{54}{0.15}$

$k =300\ N/m$

hence, the spring constant is equal to 300 N/m

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3 years ago

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A ball on the end of a rope is moving in a vertical circle near the surface of the earth. Point A is at the top of the circle; C

mrs_skeptik [129]

Answer:

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Explanation:

As we know that tension in the string at any angle with the vertical is given as

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