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Tanya [424]
3 years ago
10

Permafrost thaws only briefly in the summer. t o f brainliest

Physics
1 answer:
Verizon [17]3 years ago
5 0
The answer is False.  Permafrost does not thaws briefly in the summer since Permafrost is all year round. As global temperature rise, the amount that frozen soil that melts is increasing.  With warmer temperature, snow and ice that used to reflect sunlight is disappearing.  Thus, the newly exposed soil absorbs heat from the sunlight, and encourages melting.
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When the k. E of
Ierofanga [76]

\sqrt{2}Answer:

KE2 = 2 KE1

1/2 M V2^2 = 2 * (1/2 M V1^2)

V2^2 = 2 V1^2

V2 = \sqrt{2} V1

Since momentum = M V  the momentum increases by \sqrt{2}

8 0
4 years ago
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the height of seven falls in colorado is 5/2 the height of twin falls in idahi. the sum of the two heights is 420 ft. find the h
Masja [62]
Let height of twin falls = x
height of seven falls = 2.5x

x + 2.5x = 420
3.5x = 420
x = 420/3.5 = 120

so twin falls = x = 120 ft
seven falls = 2.5x = 300 ft
6 0
3 years ago
if a car is traveling at an average speed of 60 kilometers per hour, how long does it take to travel 12 kilometers?
VashaNatasha [74]
Im sure its twelve minutes
5 0
3 years ago
I NEED THIS A SOON AS POSSIBLE
vivado [14]

Work is done when spring is extended or compressed. Elastic potential energy is stored in the spring. Provided inelastic deformation has not happened, the work done is equal to the elastic potential energy stored.

6 0
3 years ago
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A ball having a mass of 200 g is released from rest at a height of 400 mm above a very large fixed metal surface. If the ball re
AysviL [449]

Answer:

0.9

Explanation:

h = 400 mm, h' = 325 mm

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325 = e^2 x 400

e^2 = 0.8125

e = 0.9

5 0
4 years ago
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