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kkurt [141]
3 years ago
7

 Will mark as Brainliest!! If possible, Please check these!!! Quiz and I need to pass!!! If you see anything wrong from my answe

rs, please let me know!! Give points for it!!!
5.09 Quiz: How Heat Moves

Question One: What are the ways that heat moves?

A) Heat only moves through conduction and radiation.

B) Heat moves through conduction, convection, and radiation.

C) Heat only moves through air currents.

D) Heat moves from a cold object to a warm object.

Answer I chose was B.

Question two: Convection requires______to transfer heat.

A) solids

B) fluids (liquids or gases)

C) insulation

D) the vacuum of space

Answer I chose was C.

Question three: What does an insulator do?

A) An insulator emits elctromagnetic radiation.

B) An insulator slows heat transfer.

C) An insulator cools a substance.

D) An insulator warms a substance.

Answer I chose was B.

Please check and/or answer!!

~Karleif Westsson
Physics
2 answers:
jarptica [38.1K]3 years ago
5 0
I think everything looks good but 2 might not be right, it might be B
m_a_m_a [10]3 years ago
5 0

#1). correct

#2). B.  Convection is the process of hot and cold fluids FLOWING up and down, carrying heat from place to place that way.  That means there's gotta be some gas or liquid to flow from place to place, else you gotta no convection.

#3). correct


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The kinetic energy of an object is directly proportional to its mass and the square of its velocity

KE = 1/2 (mv²)

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m = mass in kg
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3 years ago
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If he feels the chances of low, normal, and high precipitation are 30 percent, 20 percent, and 50 percent respectively, What is
Brilliant_brown [7]

Question:

The operations manager for a well-drilling company must recommend whether to build a new facility, expand his existing one, or do nothing. He estimates that long-run profits (in $000) will vary with the amount of precipitation (rainfall) as follows:

Alternative             Precipitation                                

                        Low                Normal                 High

Do nothing    -100                       100                    300

Expand           350                       500                   200

Build new       750                       300                    0

If he feels the chances of low, normal, and high precipitation are 30 percent, 20 percent, and 50 percent respectively, What is EVPI (Expected value of Perfect Information)?

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C. $285,000

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D. $170,000

Explanation:

The expected long run profits are  for

                        Low                Normal                 High

Do nothing    -100*0.3                100*0.2                   300*0.5 = 140

Expand           350*0.3                500*0.2                  200*0.5 = 305

Build new       750*0.3                300*0.2                  0*0.5    = 285

Therefore the expected long run profits are

$140,000

$305,000

$285,000

Based on his selected option being either to build new or to expand, the most profitable option is to expand

=$305,000

EVPI = EPPI-EMV =$170,000

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