2 years ago

Describe the stratosphere.

1 answer:

8 0

1. The stratosphere is above the troposphere. This layer of the atmosphere is where planes fly. At the top of the stratosphere, there is a ozone layer.

2. The mesosphere is above the stratosphere. Temperatures drastically drop in the mesosphere. It is the middle layer of the atmosphere.

3. Here are the layers of the atmosphere:

Troposphere
Stratosphere
Mesosphere
Thermosphere
Exosphere

Hope this helps you!

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A 416 kg merry-go-round in the shape of a horizontal disk with a radius of 1.7 m is set in motion by wrapping a rope about the r

kipiarov [429]

Answer:

The torque exerted on the merry-go-round is 766.95 Nm

Explanation:

Given;

mass of the merry-go-round, m = 416 kg

radius of the disk, r = 1.7 m

angular speed of the merry-go-round, ω = 3.7 rad/s

time of motion, t = 2.9 s

The torque exerted on the merry-go-round is calculated as;

$\tau = Fr= I\alpha\\\\\tau = (\frac{1}{2} m r^2)(\frac{\omega }{t} )\\\\\tau = (\frac{1}{2} \times 416 \times 1.7^2)( \frac{3.7}{2.9} )\\\\\tau = 766.95 \ Nm$

Therefore, the torque exerted on the merry-go-round is 766.95 Nm

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2 years ago

Why is sound not an electromagnetic wave

pishuonlain [190]

Answer:

There is no sound in space because there are no molecules there to transmit the sound waves. Electromagnetic waves are not like sound waves because they do not need molecules to travel. This means that electromagnetic waves can travel through air, solid objects and even space.

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2 years ago

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List two things phytoplankton need to survive. Name at least two special adaptations phytoplankton have to stay in the photic zo

cluponka [151]

They need water and sunlight to survive

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3 years ago

An object moving with constant acceleration changes speed from 20 mi./s to 60 mi./s in 2.0 seconds what is the acceleration

natali 33 [55]

Acceleration = change in velocity / time
= 40 mi/s / 2s = 20 mi/s/s

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