Answer: A person can weigh differently at various place on Earth because of the fluctuations in Earth's gravity, according to a new high-resolution map. ... Earth's gravity is weaker at the equator due to centrifugal forces produced by the planet's rotation
Explanation:
The distance from the centre of the rule at which a 2N weight must be suspend from A is 29.3 cm.
<h3>Distance from the center of the meter rule</h3>
The distance from the centre of the rule at which a 2N weight must be suspend from A is calculated as follows;
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20 A (30 - x)↓ x ↓ 20 cm B 30 cm
2N 0.9N
Let the center of the meter rule = 50 cm
take moment about the center;
2(30 - x) + 0.9(x)(30 - x) = 0.9(20)
(30 - x)(2 + 0.9x) = 18
60 + 27x - 2x - 0.9x² = 18
60 + 25x - 0.9x² = 18
0.9x² - 25x - 42 = 0
x = 29.3 cm
Thus, the distance from the centre of the rule at which a 2N weight must be suspend from A is 29.3 cm.
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Answer:
The drift velocity of the electrons in this case is c) 5.52 x 10-4 m/s
Explanation:
Hi
First of all, we need to find the volume occupied by 63.3g of copper, so
, then if we assume each atom of copper contributes with one free electron to the material body
.
Finally, we apply
, where A is area so,
, thus
.
As we can see c. 5.52 x 10-4 m/s is the nearest one.
Answer: The length L of the wire used to construct the coil is 191.4m
Explanation: Please see the attachments below