Question

WILL MEDAL!!!

The temperature of a gas decreases 0.045°C every minute for 8 min. What is the change in the temperature of the gas?

Use a positive or negative number to express the change in the temperature of the gas.

Answer 1

@freckles

Answer 2

@Hoslos

Answer 3

your looking for the rate of change which is expressed as rate/time. since the change is neg ====> -rate/time

Answer 4

??? clearer please?

Answer 5

so in speed is a rate of change/time, 30mi/hour. here your rate is not a distance, its an amount of degrees / min

Answer 6

your speed*

Answer 7

Rate of a quantity is quantity/time. Since we use SI BASE units, you should first convert those 8 minutes into seconds, becoming 8*60= 480s. So the rate of change is -0.045oC/480s. But the best rate to give has to be something/second. So you divide both sides by 480, having 9.4*10^-5degreesC per second.

Answer 8

i'm still confused *_*

Answer 9

you are taking -.045C/8min and turning the denominator into a unit of secs, -.045C/480s, but this is still describing a change in mins, so you multiply the top to get it over one sec. so the expression would then be describing a change per sec

Answer 10

sorry , you multiply the top by 480

Answer 11

so -.045c times 480?

Answer 12

sorry divide

Answer 13

my calculator says that it's 0.00009375

Answer 14

DomPoppy, first things first is convert the minuts to second. So instead of 8 mins, you have 8*60 = 480 s. So your rate of change is -0.045degrees per 480 seconds.
But to represent rate, we present as per 1 second or per second. SO for that you will have to divide both values of temperature of time by 480, so that you have per second instead of per 480 seconds. You will finally get -9.4*10^-5degrees /second. Got it ?

Answer 15

Correct.

Answer 16

well its supposed to be neg but yeah, that = to 9.4*10^-5

Answer 17

so is my calculator right?

Answer 18

or wrong?

Answer 19

-89?

Answer 20

is it -89?

Answer 21

hello?

Answer 22

-9.4*10^-5degrees /second

Answer 23

-94?

Answer 24

Your calculator was right when it was - 9.4*10^-5

Answer 25

so it is -89?

Answer 26

-89 what?

Answer 27

ummm -89 * 480?

Answer 28

-42720

Answer 29

No. I said -5 first you had 0.045/480, have to divide both of those numbers by 480, getting -9.4*10^-5 degrees per second.

Answer 30

-445?

Answer 31

@freckles

Answer 32

Did you get ?

Answer 33

well, you told me -5 so i tried -5 but i still don't know why -5

Answer 34

My mistake. Just read the whole phrase without the 5 thing.

Answer 35

i do not get ^

Answer 36

what the heck is ^

Answer 37

What is that you dont get ?

Answer 38

^

Answer 39

To the power of.

Answer 40

oh

Answer 41

there's ^ for negatives?

Answer 42

Yes.

Answer 43

i really need to be done with this test soon its 11:38 pm where i am and it will count it as me doing it tomorrow if i don't get it done before 12:00

Answer 44

scratch that, its 11:41 where i am

Answer 45

Mind telling me where are you ?

Answer 46

why does it matter?

Answer 47

I am just curious to hear a country different from where I am.