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3 years ago

10

Which of of the following is a physical change ice melting into a puddle of water,Leaves changing color in fall, Or baking a cak

e

1 answer:

Tom [10]3 years ago

4 0

Answer:

ice melting

Explanation:

Because once it melts you can change it back to ice.

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How much heat is needed to melt 16.5kg of silver that is initially at 20*c?

zubka84 [21]

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3 years ago

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4 years ago

In a double-slit experiment, the slits are illuminated by a monochromatic, coherent light source having a wavelength of 609 nm.

Ray Of Light [21]

Answer:

$\Delta x = 3.65 \mu m$

Explanation:

As we know that the sixth order maximum will have path difference given as

$\Delta x = N\lambda$

here we know that

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$\lambda = 609 nm$

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$N = 6$

so we know that

$\Delta x = 6(609 nm)$

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6 0

3 years ago

If 35 J of work was performed in 70 seconds, how much power was used to do this task?

Irina18 [472]

$P = w \times delta \: T$
P = Power
W = Work
Delta T = Change of Time

So:
P = 35 Joules
Delta T = 70 secs
W = ?

$P = 35 \div 70 \\ P = 0.5 \: watts$

* Joule/Sec = Watt

Answer: The power used to do this task was 0.5 Watts.

5 0

3 years ago