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3 years ago

A line segment may have more then one midpoint true or false

Geography

1 answer:

IrinaK [193]3 years ago

4 0

False.

A line segment has two distinct ends, and the midpoint is halfway between them. A number cannot have more than one half, and in the same way, a line segment cannot have more than one midpoint.

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if the atmosphere is unstable and has strong winds, then the emissions from a smoke stack will ____________.

Ket [755]

When the air is unstable or the atmosphere is unstable this means there is a difference between high pressure and low pressure. The capacity to transport and disperse pollution will be more or higher.

The noxious gas like the Sulphur dioxide, nitrogen oxide, carbon oxide, and monoxide that results in urban smog will rise and spread more quickly. This will lead to the unblocking of sunlight.

The gases originating from the boiler and other places where the combustion occurs will not adversely affect the environment.

Learn more about the atmosphere is unstable and has strong winds.

brainly.com/question/13276433.

3 0

3 years ago

Read 2 more answers

Imagine that you have obtained spectra for several galaxies and have measured the observed wavelength of a hydrogen emission lin

Lerok [7]

Answer:

A. z (galaxy 1) = -0.00515, z (galaxy 2) = -0.01707, z (galaxy 3) = -0.04008

B. v (galaxy 1) = -0.00517c, v (galaxy 2) = -0.01707c, v (galaxy 3) = -0.0401c

C. d (galaxy 1) = -21 Mpc,d (galaxy 2) = -69.4 Mpc, d (galaxy 3) = -163 Mpc

Explanation:

We begin by listing out the parameters we were given:

λ (obsv) = 656.3 nm, λ (emit 1) = 659.7 nm, λ (emit 2) = 667.7 nm,

λ (emit 3) = 683.7 nm

A) Using the Redshift formula, we have:

z = [λ (obsv) - λ (emit)] ÷ λ (emit)

For galaxy 1:

z = [λ (obsv) - λ (emit 1)] ÷ λ (emit 1)

z = (656.3 - 659.7) ÷ 659.7 = -0.00515

z = -0.00515

For galaxy 2:

z = [λ (obsv) - λ (emit 2)] ÷ λ (emit 2)

z = (656.3 - 667.7) ÷ 667.7 = -0.01707

z = -0.01707

For galaxy 3:

z = [λ (obsv) - λ (emit 3)] ÷ λ (emit 3)

z = (656.3 - 683.7) ÷ 683.7 = -0.04008

z = -0.04008

B) Using the Doppler formula, we have:

(Δλ ÷ λ) = v ÷ c

v = c * (Δλ ÷ λ)

but, z = (Δλ ÷ λ)

⇒ v = c * z

speed of light (c) = 3 x $10^{8}$ m/s

For galaxy 1:

v = c * z

Substitute z into the equation calculated from A) above

v = 3 x $10^{8}$ * (-0.00515)

v = -1.55 x $10^{6}$ m/s

v = -0.00517c

For galaxy 2:

v = c * z

Substitute z into the equation calculated from A) above

v = 3 x $10^{8}$ * (-0.01707)

v = -5.12 x $10^{6}$ m/s

v = -0.01707c

For galaxy 3:

v = c * z

Substitute z into the equation calculated from A) above

v = 3 x $10^{8}$ * (-0.04008)

v = -12.03 x $10^{6}$ m/s

v = -0.0401c

N.B: the negative value of velocity connotes that the galaxies are moving away from us (not towards us)

C) Using Hubbleʹs law, we have:

v = H · d

where:

v = velocity of a galaxy (km/s), d = distance (Mpc),

H = Hubble's constant (km/s/Mpc) = 73.8 km/sec

d = v ÷ H

We use the velocities calculated in B) above

For galaxy 1:

v = -1.55 x $10^{3}$ km/s

d = -1.55 x $10^{3}$ ÷ 73.8

d = -21 Mpc

For galaxy 2:

v = -5.12 x $10^{3}$ km/s

d = -5.12 x $10^{3}$ ÷ 73.8

d = -69.4 Mpc

For galaxy 3:

v = -12.03 x $10^{3}$ km/s

d = -12.03 x $10^{3}$ ÷ 73.8

d = -163 Mpc

N.B: distance cannot be a negative value

4 0

3 years ago

What is the significance of The Enclosure Act?

anygoal [31]

Answer:

"Enclosure” refers to the consolidation of land, usually for the stated purpose of making it more productive. The British Enclosure Acts removed the prior rights of local people to rural land they had often used for generations.

Explanation:

8 0

3 years ago

Scientists believe that Europe's Alps could lose____ of their glaciers due to climate change.

Dahasolnce [82]

I think the answer is b

7 0

3 years ago

If platinum has a density of 21.46g/cm³ ... if you have 5cm³ volume of platinum what is its mass

mixer [17]

Answer:

107.3g

Explanation:Density = Mass/Volume

There are two methods either by taking the above formula and inserting the values or by using Mass = Denstiy*Volume

Here I have showed you both the ways:

1st

As Desnity is 21.46g/cm^3

Volume = 5cm^3

Let m be mass

21.46g/cm^3=m/5cm^3

Cross multiplication takes place here

21.46*5=m

107.3 =m

Therefore, mass of platinum = 107.3g

2nd

Mass = Denstiy*Volume

Density = 21.46g/cm^3

Volume = 5cm^3

m=21.46g/cm^3* 5g/cm^3

m= 107.3g

5 0

3 years ago