All categories

2 years ago

Which of the following statements about the rivers of the United States and Canada is false?

Geography

2 answers:

liubo4ka [24]2 years ago

8 0

Answer:

Yea its A

Explanation:

Zepler [3.9K]2 years ago

7 0

Answer:

A. The Grand Canyon was formed by the continuous flow of the Columbia River.

Explanation:

The Columbia River and the Grand Canyon do not have any touching point, let alone that the Grand Canyon has been formed by the flow of this river. Columbia River is a big river, and it flows through the northwestern part of the country. It is very important for the people that live in this part of the Untied States because the river flows into the Pacific Ocean, and it is big enough so that boats can move through it and go further in the mainland, so economically it is a very important feature in the region.

You might be interested in

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

2 years ago

This is a map of Paraguay. Based on this map,whitch geographical featur could negatively affect international trade?

Tasya [4]

A negative effect on the international trade for Paraguay can be that it doesn't have any access to the ocean waters.

Explanation:

Paraguay is a South American country, located in the central part of the continent. Unlike the majority of the South American countries, Paraguay is one of the two countries that are landlocked, alongside Bolivia. This puts Paraguay is a worse situation when it comes to international trade, as it is dependent on its neighbors for it.

Because Paraguay lacks access to the ocean, it is forced to subjugate to a certain point to its neighboring countries. If the relations are good, there are no disputes, and there is collaboration, than Paraguay can trade through the ports of its neighbors, thus the political system has to be on spot. If the situation is the other way around, Paraguay can simply be blocked by sanctions or embargo and it will affect terribly ts economy.

The countries that surround Paraguay and through which it has access to the ocean are:

Brazil (has access to the ocean)
Argentina (has access to the ocean)
Bolivia (landlocked)

Learn more about the political system of Paraguay brainly.com/question/7037079

#learnwithBrainly

5 0

2 years ago

A metamorphic rock can also be thought of as a rock that changes. what causes the rock to change?

sweet [91]

Metamorphism is the addition of heat and/or pressure to existing rocks, which causes them to change physically and/or chemically so that they become a new rock. Metamorphic rocks may change so much that they may not resemble the original rock.

3 0

2 years ago

Which US region has a population that is most likely to be dominated by people of Irish, Italian, Puerto Rican, and African Amer

kolezko [41]

Id say the northern region because i was born in Pittsburgh and there is a lot of Italian and African influence

8 0

3 years ago

Read 2 more answers

What people do you know whose lives and/or stories interest you?

pochemuha

Answer:

i am interest haile gebresilase

5 0

2 years ago