A hypothesis must be TESTABLE in order to be termed a scientific hypothesis.
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Answer:
A wishing well is a term from European folklore to describe wells where it was thought that any spoken wish would be granted. The idea that a wish would be granted came from the notion that water housed deities or had been placed there as a gift from the gods.
Explanation:
sources=wikipedia
FORMULA:
V = IR, where V = P.D ; I = Current; R = Resistance.
ANSWER:
Total Resistance(Req) in parallel circuit,
1/R = 1/R1 + 1/R2 + 1/R3
- 1/R = 1/40 + 1/20 + 1/10
- 1/R = 2 + 4 + 8/80
- 1/R = 14/80
- R = 80/14Ω
Now, I = V/R
- I = 60/80 × 14
- I = 21/2
- I = 10.5ampere.
The magnitude of the vertical force that a concrete support exerts on the bridge at the far end is 201.25 N.
<h3>What is force?</h3>
The force is an action of push or pull which makes a body to move or stop.
Given is the weight of tourist W = 805 N and L is the length of the bridge.
Let the reaction force at both the ends of the bridge is R1 and R2.
Taking the moments about point A,
R1 x 0 - W x L/4 +R2 x L =0
R2 = W/4
R2 = 805 /4
R2 = 201.25 N
Thus, the magnitude of the vertical force that a concrete support exerts on the bridge at the far end is 201.25 N.
Learn more about force.
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