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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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A car with a mass of 600 kg is traveling at a velocity of 10 m/s. How much kinetic energy does it have?
Viefleur [7K]

Answer:

KE = 30,000 J

Explanation:

KE = \frac{1}{2} mv²

KE = \frac{1}{2} (600)(10)²

KE = \frac{1}{2} (600)(100)

KE = \frac{1}{2} (60000)

KE = 30,000 J

5 0
4 years ago
PLEASE ANSWER! WILL MARK BRAINLIEST!
Angelina_Jolie [31]

The first one would be thermal energy

8 0
3 years ago
How much heat is evolved when 1234 g of water condenses to a liquid at 100.°c?
lbvjy [14]
During the phase transition vapour --> liquid water, the temperature of the water does not change; the molecules of water release heat and the amounf of heat released is equal to
Q=mL_e
where
m is the mass of the water
L_e is the latent heat of evaporation.

For water, the latent heat of evaporation is L=2257 kJ/kg, while the mass of the water is
m=1234 g=1.234 kg

so, the amount of heat released in the process is
Q=mL_e = (1.234 kg)(2257 kJ/kg)=2785 kJ
6 0
3 years ago
what is the potential energy of the ball when it gets to its maximum height just before falling back to the ground​
love history [14]

Answer:

I will say that the the potential energy will be at its maximum.

Explanation:

potential energy deals with gravity and gravity deals with height, so when a object is in its maximum height it will have the maximum potential energy.  

6 0
3 years ago
Henrietta is going off to her physics class, jogging down the sidewalk at a speed of 2.70 m/s. Her husband Bruce suddenly realiz
Katen [24]

Answer:

The velocity is v  =  6.66 \  m/s

Henrietta is at distance s=  18.17 \  m from the under the window

Explanation:

From the question we are told that

The speed of Henrietta is v=  2.70 \ m/s

The height of the window from the ground is h  =  36.5 \  m

Generally the time taken for the lunch to reach the ground assuming it fell directly under the window is

t  =  \sqrt{\frac{2 *  h }{g} }

=> t  =  \sqrt{\frac{2 *  36.5 }{9,8} }

=> t  =  2.73 \  s

Generally the time taken for the lunch to reach Henrietta is mathematically represented as

T =  t +  t_1

Here t_1 is the time duration that elapsed after Henrietta has passed below the window the value is given as 4 s

Now

T = 2.73  +  4

=> T = 6.73 \  s

Generally the distance covered by Henrietta before catching her lunch is

s=  v  *  T

=> s=  2.70  * 6.73

=> s=  18.17 \  m

Generally the speed with which Bruce threw her lunch is mathematically represented as

v  =  \frac{18.17}{2.73}

v  =  6.66 \  m/s

4 0
3 years ago
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