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3 years ago

8

For convection to occur,

1 answer:

Maurinko [17]3 years ago

4 0

A. D<span>ark objects are required to absorb energy</span>

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Describe the energy transformations that occur in a waterfall...

Leno4ka [110]

<span>At the top of the waterfall, the water has potential energy. Once it goes over</span>

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3 years ago

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In operant conditioning, generalization occurs when

Vitek1552 [10]

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3 years ago

A hiker starts at point P and walks 2.0 km due east and then walks at an angle of 30 degrees north of east for 1.4 km.

olchik [2.2K]

Answer:

The magnitude of the hiker’s displacement is 2.96 km

Explanation:

Let the initial displacement of the hiker, = x = 2km

the final displacement of the hiker, = y = 1.4 km

The resultant of the two vectors, According to Pythagorean theorem is the vector sum of the two vectors.

R' = x' + y'

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3 years ago

Which statement accurately describes the relationship between force and momentum?

ivann1987 [24]

Answer:

A.

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3 years ago

a sealed cylinder contains a sample of ideal gas at a pressure of 2.0 atm. The rms speed of the molecules is v0. If the rms spee

fredd [130]

Answer:

P_2 = 1.62 atm

Explanation:

We know the formula for the rms speed of the ideal gas is given by

$v_{rsm}=\sqrt{\frac{3PV}{m} }$

P= pressure of the surrounding

V= volume of the vessel

m= mass of the gas

Now, From this formula rms speed (v_rms) is directly proportional to square root is pressure.

Then

$\frac{v_{rsm,1}}{v_{rsm,2}} =\sqrt{\frac{P_1}{P_2} }$

given that v_rsm,1= v0

and v_rsm,2=0.9v0

putting these values we get

$\frac{v0}{0.9v0} =\sqrt{\frac{2}{P_2} }$

P_2 = 1.62 atm

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3 years ago

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