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3 years ago

7

Which best compares freezing and condensation?

2 answers:

aliya0001 [1]3 years ago

6 0

Condensation is a state from going to gas to a liquid and Freezing is a state from going to liquid to a solid

Charra [1.4K]3 years ago

3 0

Answer:

C. Both involve the release of heat.

Explanation:

The change in state from liquid to solid (freezing) changes to a state of matter where atoms slow down. This also happens in the change in state from gas to liquid (condensation). The change in this movement is released as heat.

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A skateboarder is standing at the top of a tall ramp waiting to begin a trip. The skateboarder has

son4ous [18]

<span>. An object at an elevated position will have stored energy while not in motion potential energy is given by (m*h*g) or
(weight*h) due to gravity.
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potential energy only
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3 years ago

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In a World Cup soccer match, Juan is running due north toward the goal with a speed of 7.60 m/s relative to the ground. A teamma

spayn [35]

Answer:

Part a)

$v_{bj} = 11.03 m/s$

Part b)

$\theta = 4.57 degree$ East of South

Explanation:

Part a)

Velocity of Juan is given as

$v_1 = 7.60 m/s \hat j$

velocity of the ball is given as

$v_2 = 12.9(cos31.4 \hat i + sin31.4\hat j)$

now we have

$v_2 = 11\hat i + 6.72\hat j$

Part a)

We need to find velocity of ball with respect to Juan

so it is given as

$v_{bJ} = \vec v_b - \vec v_j$

$v_{bj} = 11\hat i + 6.72 \hat j - 7.6\hat j$

$v_{bj} = 11\hat i - 0.88\hat j$

magnitude of the speed is given as

$v_{bj} = \sqrt{11^2 + 0.88^2}$

$v_{bj} = 11.03 m/s$

Part b)

direction of velocity of the ball

$tan\theta = \frac{v_y}{v_x}$

$tan\theta = \frac{-0.88}{11}$

$\theta = 4.57 degree$ East of South

3 0

3 years ago

You could use an elevator or the stairs to lift a box to the tenth floor.which has greater power?why?

Lera25 [3.4K]

Elivator, cause their is more gravity fighting agenced it, because its being directly lifted

7 0

3 years ago

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A frog falls from its rainforest tree. If we ignore wind resistance, (a) how much time does it take the frog to fall a distance

gtnhenbr [62]

Answer:

Explanation:

a) Using the equation of motion

S = ut + 1/2gt²

S is the distance of fall

g is the acceleration due to gravity

t is the time taken

Given S = 12.0m, g = 9.81m/s^2, un= 0m/s

12 = 0+1/2(9.81)t²

12 = 4.905t²²²

t² = 12/4.905

t² = 2.446

t = √2.446

t = 1.56secs

b) To determine how fast is the frog falling at this point, we need to calculate the speed of the frog. Using the equaton v = u+gt

v = 0+9.81(1.56)

v = 15.34m/s

Hence the frog is falling at the rate of 15.34m/s

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3 years ago

Identify the elements that come before iron (Fe) in the periodic table Fe, Co, Cu, K, Ni, Mn

harkovskaia [24]

FE is iron CO is cobalt CU is copper K is potassium NI is nickle MN is magnemese

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3 years ago

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