3 years ago

The sun's _____ is the layer that emits visible light.

Physics

1 answer:

galben [10]3 years ago

7 0

The Photosphere is the right answer

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liubo4ka [24]

first off lemme just say this is really easy man, just look at the directions

Blank #1: -23

Blank #2: 23

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2 years ago

A 49.0 kg wheel, essentially a thin hoop with radius 0.730 m, is rotating at 114 rev/min. It must be brought to a stop in 22.0 s

belka [17]

Explanation:

Mass of the wheel, m = 49 kg

Radius of the hoop, r = 0.73 m

Initial angular speed of the wheel, $\omega_i=114\ rev/min = 11.93\ rad/s$

Final angular speed of the wheel, $\omega_f=0$

Time, t = 22 s

(a) If I is the moment of inertia of the hoop. It is equal to,

$I=mr^2$

$I=49\times (0.73)^2$

$I=26.11\ kg-m^2$

We know that the work done is equal to change in kinetic energy.

$W=\Delta E$

$W=\dfrac{1}{2}I(\omega_f^2-\omega_i^2)$

$W=-\dfrac{1}{2}\times 26.11\times (11.93^2)$

W = -1858.05 Joules

(b) Let P is the average power. It is given by :

$P=\dfrac{W}{t}$

$P=\dfrac{1858.05\ J}{22\ s}$

P =84.45 watts

Hence, this is the required solution.

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3 years ago

Which of these is formed by a hot spot in Earth's crust?

dimulka [17.4K]

Answer:

we need to know what the choices are?

Explanation:

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3 years ago

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(e)<br> Give an example of a process when electrons behave as:<br><br> A.particles.<br> B.a wave.

borishaifa [10]

Answer:

particles

Explanation:

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3 years ago

A hard drive has 250 gigabytes of storage?

Dafna11 [192]

A. 0.25 terabytes
b. 2.5e + 17

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3 years ago