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Mathematics 12 Online
OpenStudy (taylor0402):

is anyone good at science

OpenStudy (cheyennecoffelt):

depends on the type of science.

OpenStudy (anonymous):

yeah depending on what kind

OpenStudy (taylor0402):

well heres the question Which observation would be evidence that heat was transferred by radiation? A) A person feels colder when the wind is blowing. B) A pan on a stove heats up the food placed in it. C) Warm air in the kitchen rises to the second floor of the house. D) A car with the windows rolled up gets very hot on a summer day.

OpenStudy (anonymous):

B right @CheyenneCoffelt

OpenStudy (taylor0402):

thats what i think it is idk it will tell me when i get it wrong

OpenStudy (taylor0402):

it was D

OpenStudy (anonymous):

wait it might be D

OpenStudy (anonymous):

never mind

OpenStudy (taylor0402):

it was D its ok

OpenStudy (taylor0402):

i need help with another one

OpenStudy (taylor0402):

During the day, the temperature of the sand in a desert rises as the sand is heated by the sun. After the sun sets, the sand cools. What happens to the heat energy in the sand as it cools? A) It is destroyed. B) It is used by the sand to do work. C) It goes back into the sun, completing the cycle. D) It is transferred to the air via the process of radiation.

OpenStudy (taylor0402):

i think d

OpenStudy (anonymous):

yeah ause car windows rolled up and it is getting hot and usually the radiation from the sun heats it up sooo

OpenStudy (anonymous):

*cause

OpenStudy (taylor0402):

im about to leave

OpenStudy (anonymous):

yeah i gotta go D also mark out A and C so it leaves D and B and D would be a better choice

OpenStudy (cheyennecoffelt):

D for both

OpenStudy (taylor0402):

no it would be between c and d because heat has to go some were it dosent just dissapear

OpenStudy (taylor0402):

yay it was D

OpenStudy (anonymous):

but it can't just go back to the sun

OpenStudy (taylor0402):

Two iron rods are placed horizontally, touching end-to-end. One end of one rod is heated. After some time, the other rod also feels warm to touch. How did the heat travel from the heated rod to the one that was not heated? A) The air over the heated rod traveled to the other rod and made it warm. B) Part of the heat was converted to radiation and traveled to the cooler rod. C) Electrons within the rods started moving, distributing heat consistently in both rods. D) The molecular movement in the first rod transferred energy to the molecules in the second.

OpenStudy (anonymous):

mark out A

OpenStudy (taylor0402):

ok

OpenStudy (taylor0402):

i think it might be C

OpenStudy (cheyennecoffelt):

do your questions like D as their answer? sheesh

OpenStudy (anonymous):

Please do not give direct answer guys!

OpenStudy (taylor0402):

idk

OpenStudy (anonymous):

dang i feel as if C but maybe not cause the choices are very compelling

OpenStudy (taylor0402):

ya i agree

OpenStudy (taylor0402):

Damn it it was D.

OpenStudy (anonymous):

lol i was thinking that as another option XD

OpenStudy (taylor0402):

Why do the inner walls of a vacuum flask have a silver coating? A) To stop heat loss by radiation B) To reduce heat loss by radiation C) To reduce heat loss by conduction D) To reduce heat loss by convection

OpenStudy (cheyennecoffelt):

that's why i asked. all the answers were D

OpenStudy (cheyennecoffelt):

oh wait idk about this one

OpenStudy (taylor0402):

ohhh

OpenStudy (taylor0402):

i got it it was B

OpenStudy (anonymous):

B

OpenStudy (cheyennecoffelt):

The silver coating on the inner bottle prevents heat transfer by radiation

OpenStudy (taylor0402):

Conduction is the process in which A) there is no medium required for heat transfer. B) cold air displaces warmer air and causes air circulation. C) the collisions of molecules within a substance transfer heat energy. D) air flows from one location in the atmosphere to another helping to transfer heat energy.

OpenStudy (anonymous):

between c or d

OpenStudy (anonymous):

ehhh c

OpenStudy (taylor0402):

yay got it right it was c

OpenStudy (taylor0402):

Energy is transferred in solids by conduction, which means that A) heat travels in both directions. B) heat travels from the cooler object to the hotter object. C) heat travels from the hotter object to the cooler object. D) heat does not travel between objects of different temperatures.

OpenStudy (anonymous):

c

OpenStudy (taylor0402):

i got it it was c

OpenStudy (taylor0402):

What type of heat transfer is used to fry an egg in a pan and how can you tell?

OpenStudy (taylor0402):

go it

OpenStudy (anonymous):

is it conduction or radiation ?

OpenStudy (taylor0402):

Which would be best categorized as heat transfer by conduction? A) Wearing a white shirt to stay cool on a summer day. B) Cooling a burn on your hand by running your hand under cold water. C) Feeling the heat from a light bulb with your hand when touching the bulb. D) Feeling the heat from a light bulb while holding your hand from 6 inches away.

OpenStudy (taylor0402):

it was c got it correct

OpenStudy (anonymous):

c

OpenStudy (anonymous):

dang let me think for like 3 seconds lol

OpenStudy (taylor0402):

sorry i was just telling you i got it right

OpenStudy (anonymous):

well as long as it was right

OpenStudy (taylor0402):

When ironing clothes, the primary method of heat transfer is A) conduction. B) convection. C) insulation. D) radiation.

OpenStudy (anonymous):

B or A

OpenStudy (taylor0402):

i know i just dont know which one

OpenStudy (taylor0402):

i got it right it was A

OpenStudy (taylor0402):

yay i passed with an 80% thanks

OpenStudy (anonymous):

lol welcome

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