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4 years ago

Please write a paragraph (5 sentence minimum) that describes convection in Earth's atmosphere.

Physics

1 answer:

ExtremeBDS [4]4 years ago

5 0

Answer:

Earth's crust is covered by a densed air blanket called atmosphere. Due to which we feel warm even during night when there is no sun. The air near the atmosphere is less dense compared to the air near our crust. Similarly we can experience high pressure near the atmosphere comparelatively we experience less pressure near crust. The presence of atmosphere above us makes the wind fair sometimes stromy and also helps in pteperation of wind and breezes in earth's surface.

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Two adjacent natural frequencies of an organ pipe are determined to be 986 Hz and 1102 Hz. (Assume the speed of sound is 343 m/s

ch4aika [34]

Answer:

The fundamental frequency and the length of the pipe are 115.8 Hz and 1.48 m.

Explanation:

Given that,

First frequency = 986 Hz

Second frequency = 1102 Hz

We need to calculate the length of the pipe

Using formula of length

$\Delta f=f_{2}-f_{1}=\dfrac{nv}{2L}$

Put the value into the formula

$1102-986=\dfrac{1\times343}{2\times L}$

$L=\dfrac{343}{2\times116}$

$L=1.48\ m$

We need to calculate the fundamental frequency of this pipe

$f_{1}=\dfrac{nv}{2L}$

Put the value into the formula

$f_{1}=\dfrac{1\times343}{2\times1.48}$

$f_{1}=115.8\ Hz$

Hence, The fundamental frequency and the length of the pipe are 115.8 Hz and 1.48 m.

5 0

3 years ago

A student weighing 200N climbs a flight of stairs 7.0m high in 8s. What power is required to perform this task?

noname [10]

Answer:

Power required, P = 175 watts

Explanation:

It is given that,

Weight of a student, F = mg = 200 N

The student climbs a flight of stairs of height, h = 7 m

Time taken, t = 8 s

We have to find the power required to perform this task. Work done per unit time is called the power required. Mathematically, it is given by :

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

W = work done

t = time taken

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

$P=\dfrac{200\ N\times 7\ m}{8\ s}$

P = 175 watts

Hence, the power required to complete this task is 175 watts.

3 0

4 years ago

A uranium nucleus is traveling at 0.94 c in the positive direction relative to the laboratory when it suddenly splits into two p

Anettt [7]

Answer:

A u = 0.36c B u = 0.961c

Explanation:

In special relativity the transformation of velocities is carried out using the Lorentz equations, if the movement in the x direction remains

u ’= (u-v) / (1- uv / c²)

Where u’ is the speed with respect to the mobile system, in this case the initial nucleus of uranium, u the speed with respect to the fixed system (the observer in the laboratory) and v the speed of the mobile system with respect to the laboratory

The data give is u ’= 0.43c and the initial core velocity v = 0.94c

Let's clear the speed with respect to the observer (u)

u’ (1- u v / c²) = u -v

u + u ’uv / c² = v - u’

u (1 + u ’v / c²) = v - u’

u = (v-u ’) / (1+ u’ v / c²)

Let's calculate

u = (0.94 c - 0.43c) / (1+ 0.43c 0.94 c / c²)

u = 0.51c / (1 + 0.4042)

u = 0.36c

We repeat the calculation for the other piece

In this case u ’= - 0.35c

We calculate

u = (0.94c + 0.35c) / (1 - 0.35c 0.94c / c²)

u = 1.29c / (1- 0.329)

u = 0.961c

6 0

3 years ago

Answer and I will give you brainiliest

tekilochka [14]

Answer:

You are correct. Cold water sinks in warm or room temperature water.

7 0

4 years ago

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Voices of swimmers at a pool travel 400 m/s through the air and 1,600 m/s underwater. The wavelength changes from 2 m in the air

Nata [24]

The frequency of a sound is whatever frequency leaves the source. It doesn't change.

Voiced of swimmers at the pool don't change frequency in or out of the water. Only their speed and wavelength change.

5 0

3 years ago

Read 2 more answers