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Varvara68 [4.7K]

3 years ago

15

The highly reactive elements in group 7A are known for forming salts. What are they called? transition metals metalloids halogen

s noble gases

1 answer:

liberstina [14]3 years ago

4 0

The group 7A elements are called Halogens.

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An inverted pyramid is being filled with water at a constant rate of 45 cubic centimeters per second. The pyramid, at the top, h

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Answer:

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Explanation:

Length of the base = l

Width of the base = w

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We have:

Rate at which water is filled in cube = $\frac{dV}{dt}= 45 cm^3/s$

Square based pyramid:

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$V=\frac{1}{3}\times (\frac{6h}{13})^2\times h$

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Differentiating V with respect to dt:

$\frac{dV}{dt}=\frac{d(\frac{12}{169}h^3)}{dt}$

$\frac{dV}{dt}=3\times \frac{12}{169}h^2\times \frac{dh}{dt}$

$45 cm^3/s=3\times \frac{12}{169}h^2\times \frac{dh}{dt}$

$\frac{dh}{dt}=\frac{45 cm^3/s\times 169}{3\times 12\times h^2}$

Putting, h = 4 cm

$\frac{dh}{dt}=\frac{45 cm^3/s\times 169}{3\times 12\times (4 cm)^2}$

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