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11111nata11111 [884]

3 years ago

15

A coffee machine transfers 12 kj of energy in 15 seconds. It uses 230 v mains supply. Use this information to work out the curre

nt through the coffee machine

1 answer:

Otrada [13]3 years ago

6 0

Answer:

3.5 A

Explanation:

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Why was Earth very hot at the beginning of its formation? Select all that apply.

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Answer:

heat came from the supernova that led to the formation of solar system

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3 years ago

Single Replacement: HCI + Zn

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During a single replacement, the Zn and H will switch places. That means the product formed will be ZnCl and H2.

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Multiple-Concept Example 13 presents useful background for this problem. The cheetah is one of the fastest accelerating animals,

Andre45 [30]

Answer:

9241.6 W or 12.39318 hp

Explanation:

u = Initial velocity = 0

v = Final velocity

m = Mass

t = Time taken

Energy

$KE=\frac{1}{2}m(v^2-u^2)\\\Rightarrow KE=\frac{1}{2}108(30.4^2-0^2)\\\Rightarrow KE=49904.64\ Joules$

Power

$P=\frac{KE}{t}\\\Rightarrow P=\frac{49904.64}{5.4}\\\Rightarrow P=9241.6\ W$

Converting to hp

$1\ W=\frac{1}{745.7}\ hp$

$\\\Rightarrow 9241.6\ W=\frac{9241.6}{745.7}\ hp=12.39318\ hp$

The power developed by the cheetah is 9241.6 W or 12.39318 hp

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The average adult in the us spends 24 hours watching televistion each week

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Hope this helps

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