4 years ago

This i relatively easy but still, i attached a picture

1 answer:

3 0

Ultraviolet has a shorter wavelength than microwaves, so purple also has a shorter wavelength than red.

C is thus the answer

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The weight of a metal bracelet is measured to be 0.100 N in air and 0.092 N when immersed in water. Find its density

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If you subtract the two weights, 0.100 N and 0.092 N, we will get 0.008. So, the density between 0.100 and 0.092 is 0.008. :)

Answer: 0.008

I hope this helped!:)

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When a metal element bonds with a non mental element they are known as ____ bond

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Answer:

ionic

Explanation:

ionic bond is when a metal and nonmetal are bonded together

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4 years ago

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irina1246 [14]

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A rod of 2.0-m length and a square (2.0 mm × 2.0 mm) cross section is made of a material with a resistivity of 6.0 × 10–8 Ω ⋅ m.

Andrews [41]

Answer:

= 8.33 Watt

Explanation:

$R = \frac{pl}{A}$

where,

p = resistivity

l = length

A = cross section area

Given that ,

p = resistivity = 6.0 × 10–8 Ω

l = 2m

A = cross section area = 2.0 mm × 2.0 mm = 4 x 10^-6 m^2

A = 2 x 2 mm^2 = 4 x 10^-6 m^2

p = 6 x 10^-8 ohm metre,

V = 0.5 V

Let R be the resistance of the rod

$R = p\frac{l}{A} \\\\R = 6.0 \times 10^-^8 (\frac{2}{4 \times 10^-^6} )\\\\R = 3 \times 10^-^2$

R = 3 × 10⁻²Ω

Heat generated = V^2 / R

= (0.5)^2 / (3 x 10^-2)

= 8.33 Watt

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3 years ago