3 years ago

POSSIE

Physics

1 answer:

kotegsom [21]3 years ago

3 0

Answer:

please find attached pdf

Explanation:

Download pdf

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Morgan does 50 J of work with a lever

Vikentia [17]

Answer:

46 J

Explanation:

Simply calculate the 92% of 50 Joules as:

0.92 * 50 J = 46 J

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3 years ago

A 1500-W electric heater is plugged into the outlet of a 120-V circuit that has a 20-A circuit breaker. You plug an electric hai

Korolek [52]

Answer:

b) 900 W

Explanation:

The breaker trips when the current is equal to 20 A. The power (P) is the ddp (V) multiplied by the current. So, for the electric heater, the current is:

P = V*i

1500 = 120*i

i = 12.5 A

So, to become in 20 A, it's needed 7.5 A, which must come from the hairdryer. Its power must be:

P = 120*7.5

P = 900 W

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3 years ago

Which of the following best describes the use of a renewable resource?

bulgar [2K]

C IS THE CORRECT ANSWER.

Hope this helps!

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What part of an atom can change during a nuclear reaction but cannot change during a chemical reaction

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<span>the number of protons and neutrons. hope this helps (:

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4 years ago

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he magnetic flux through a loop of wire decreases from 1.7 Wb to 0.3 Wb in a time of 0.4 s. What was the average value of the in

Pani-rosa [81]

Answer:

Induced emf through a loop of wire is 3.5 V.

Explanation:

It is given that,

Initial magnetic flux, $\phi_i=1.7\ Wb$

Final magnetic flux, $\phi_f=0.3\ Wb$

The magnetic flux through a loop of wire decreases in a time of 0.4 s, t = 0.4 s

We need to find the average value of the induced emf. It is equivalent to the rate of change of magnetic flux i.e.

$\epsilon=-\dfrac{\phi_f-\phi_i}{t}$

$\epsilon=-\dfrac{0.3\ Wb-1.7\ Wb}{0.4\ s}$

$\epsilon=3.5\ V$

So, the value of the induced emf through a loop of wire is 3.5 V.

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3 years ago