3 years ago

Which boxes represent pure substances?

2 answers:

7 0

D only because the rest are all compounds and even though for c they are not connected they are still included to be compounded

Mademuasel [1]3 years ago

3 0

A, B and D can I have Brainlyest thx

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A straight wire segment 5 m long makes an angle of 30° with a uniform magnetic field of 0.37 T. Find the magnitude of the force

SIZIF [17.4K]

Answer:

The magnitude of the force on the wire is 2.68 N.

Explanation:

Given that,

Length of the wire, L = 5 m

Magnetic field, B = 0.37 T

Angle between wire and the magnetic field, $\theta=30^{\circ}$

Current in the wire, I = 2.9 A

We need to find the magnitude of the force on the wire. The magnetic force in the wire is given by :

$F=BIL\ \sin\theta\\\\F=0.37\ T\times 2.9\ A\times 5\ m\times \ \sin(30)\\\\F=2.68\ N$

So, the magnitude of the force on the wire is 2.68 N. Hence, this is the required solution.

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Marta_Voda [28]

Answer:

% reduction in area = 54.26 %

percentage elongation = 43.16 %

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$A_2=\pi * 3.98^2= 49.97 mm2$

% reduction in area = $\frac{(108.8 - 49.97)}{108.8} * 100 = 54.26 %$

b)percentage elongation $= \frac{(66 - 46.1)}{46.1} *100 = 43.16 %$

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CORRECT ANSWER IS 0.08

THANK YOU,

PLZ MARK ME AS BRAINLIST

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