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2 years ago

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When a certain amount of current flows through a resistor, it uses 3.00 W of power. If the current doubles, how much power will

the resistor use? (Hint: R stays the same. How does P depend on I and R?) ( unit=W)

1 answer:

asambeis [7]2 years ago

7 0

Answer: 12

Explanation: Acellus

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An electromagnetic wave can be described as a transverse magnetic wave moving

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Answer:

(B) perpendicular to and in the same direction as the transverse electric wave

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2 years ago

A box is put on a scale that is adjusted to read zero when the box is empty. A stream of marbles is then poured into the box fro

nadya68 [22]

Answer:

$F_{net} = 49 N$

Explanation:

As we know that rate of marble that strike the target is given as

$R = 120 per s$

now we know that after t = 8 s total marbles that accumulated in the box is given as

$N = Rt$

$N = 120(8)$

$N = 960$

now total weight of the marbles is given as

$W = N(mg)$

$W = 960(4.5 \times 10^{-3})(9.81)$

$W = 42.37 N$

Now force due to impact of marble is given as

$F = \frac{dN}{dt}mv$

$v = \sqrt{2gh}$

$v = \sqrt{2(9.81)(7.80)} = 12.37 m/s$

now we have

$F = 120(4.5 \times 10^{-3})(12.37)$

$F = 6.68 N$

so total force on the box is given as

$F_{net} = W + F$

$F_{net} = 42.37 + 6.68$

$F_{net} = 49 N$

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2 years ago

Why are cross cutting concepts important???<br><br> PLEASE HELPPP

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it is important because it can help students understand science

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3 years ago

If I fell asleep at 9:42 pm and woke up at 10:06 am. What was the total hours of sleep I got?

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Answer:

11 hours and 24 minutes total of sleep. Nice.

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Since its going from pm to am, We have to go past 12 to 1 and go to 9 hours am, then add 42 by 24 minutes to get to the 6 minutes past 10.

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2 years ago

Read 2 more answers

A rotating fan completes 1160 revolutions every minute. Consider the tip of a blade, at a radius of 19.0 cm. (a) Through what di

lakkis [162]

For the rotating fan that completes 1160 revolutions every minute, with a tip's radius of 19.0 cm, we have:

a) The tip will move a distance of 1.19 m in one revolution.

b) The tip's speed is 23.08 m/s.

c) The magnitude of the tip's acceleration is 2803.6 m/s².

d) The period of the motion is 0.052 s.

a) The distance to which the tip move in one revolution is given by the circumference of the circle:

$d = 2 \pi r$

Where:

r: is the radius of the blade = 19.0 cm

$d = 2 \pi r = 2\pi*0.19 m = 1.19 m$

Hence, the tip will move a <u>distance of 1.19 m</u> in one revolution.

b) The speed of the tip can be calculated with the following equation:

$v = \omega r$

Where:

ω: is the angular speed = 1160 rev/min

Then, the<u> tip's speed</u> is:

$v = \omega r = 1160 \frac{rev}{min}*\frac{2\pi rad}{1 rev}*\frac{1 min}{60 s}*0.19 m = 23.08 m/s$

c) The acceleration of the tip is given by:

$a = \frac{v^{2}}{r} = \frac{(23.08 m/s)^{2}}{0.19 m} = 2803.6 m/s^{2}$

Therefore, the magnitude of the <u>acceleration is 2803.6 m/s²</u>.

d) The period of the motion is:

$T = \frac{1}{f} = \frac{2\pi}{\omega}$

Where:

f: is the frequency

$T = \frac{2\pi}{\omega} = \frac{2\pi}{1160 \frac{rev}{min}*\frac{2\pi rad}{1 rev}*\frac{1 min}{60 s}} = 0.052 s$

Hence, the <u>period</u> of the motion <u>is 0.052 s</u>.

You can find more about the period and angular acceleration here: brainly.com/question/9708010?referrer=searchResults

I hope it helps you!

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2 years ago