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Trava [24]
3 years ago
5

What is the recommended amount of time that a teenager should be participating in physical activity

Physics
1 answer:
zmey [24]3 years ago
8 0

The answer is B) 60 min.

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Why are identical bulbs arranged in a series circuit with a battery less bright than those arranged in a parallel circuit with t
tatuchka [14]

Explanation:

Resistors connected in series obey the following equation:

R_{\rm eq} = R_1 + R_2 + R_3 + ...

Resistors connected in parallel obey the following equation:

\frac{1}{R_{\rm eq}} = \frac{1}{R_1} + \frac{1}{R_2} + \frac{1}{R_3} + ...

The total current of the circuit will obey the Ohm's Law: V = IR. And the current will be divided across the resistors (bulbs) depending on their resistances. So, if a bulb has a higher resistance, then its current will be lesser, and it will be less bright. If a bulb has a lower resistance, then its current will be higher, and it will be brighter.

According to the above resistances connected in series and parallel, clearly, the resistances (bulbs) connected in series will have more resistance in total, and therefore less current will flow across them, and they will be less bright.

6 0
3 years ago
Philip was diagnosed with __________ vestibular disorder, which is a dysfunction of the nervous system that processes balance. A
podryga [215]
D. Central

Hope I helped!
3 0
3 years ago
Read 2 more answers
6. Can an object accelerate, but not speed up or slow down?<br> Explain:
FromTheMoon [43]

Answer:

yes, though the speed may stay constant, the direction will change. so for example, you're going 70mph on the freeway, but you have to take the exit on your right (the exit continues on to a different freeway), you're not going to speed up or slow down, you'll change your direction which is still accelerating.

Explanation:

Credit goes to @naeAF

Hope this helps :))

5 0
3 years ago
A space expedition discovers a planetary system consisting of a massive star and several spherical planets. The planets all have
Juliette [100K]

Answer:

T/√8

Explanation:

From Kepler's law, T² ∝ R³ where T = period of planet and R = radius of planet.

For planet A, period = T and radius = 2R.

For planet B, period = T' and radius = R.

So, T²/R³ = k

So, T²/(2R)³ = T'²/R³

T'² = T²R³/(2R)³

T'² = T²/8

T' = T/√8

So, the number of hours it takes Planet B to complete one revolution around the star is T/√8

7 0
3 years ago
1. Why should you use scientific notation when writing big numbers?
Fynjy0 [20]

Answer:

It helps the answer look clean. It also makes the work easier to work with.

Explanation:

Instead of writing a lot of zeros, all you have to do is add exponents to the number to show how much the decimal moved.

6 0
3 years ago
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