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motikmotik
3 years ago
15

Solve: A car travels 2 km North , 10 km East, then 3 km West. pythagorean theorem

Physics
1 answer:
Evgen [1.6K]3 years ago
5 0

________b_____ 7 km east

|

| 2km north.

|a

|

°

pythagorean theorem : ✓a² + b² = c²

c² = a² + b² = 4 + 49 = 53

c = ✓53 km

displacement = c = ✓53 km

distance = 10 + 3 + 2 = 15 km

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Answer:

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Answer:

Explanation:

In order to be able to solve this problem, you will need to know the value of water's specific heat, which is listed as

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4.18

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In water's case, you need to provide

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What if you wanted to increase the temperature of

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increase by 1

∘

C



4.18 J

+

increase by 1

∘

C



4.18 J

=

increase by 2

∘

C



2

×

4.18 J

To increase the temperature of

1 g

of water by

n

∘

C

, you'd need to supply it with

increase by 1

∘

C



4.18 J

+

increase by 1

∘

C



4.18 J

+

...

=

increase by n

∘

C



n

×

4.18 J

Now let's say that you wanted to cause a

1

∘

C

increase in a

2-g

sample of water. You'd need to provide it with

for 1 g of water



4.18 J

+

for 1 g of water



4.18 J

=

for 2 g of water



2

×

4.18 J

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∘

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4.18 J

+

for 1 g of water



4.18 J

+

,,,

=

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m

×

4.18 J

This means that in order to increase the temperature of

m

grams of water by

n

∘

C

, you need to provide it with

heat

=

m

×

n

×

specific heat

This will account for increasing the temperature of the first gram of the sample by

n

∘

C

, of the the second gram by

n

∘

C

, of the third gram by

n

∘

C

, and so on until you reach

m

grams of water.

And there you have it. The equation that describes all this will thus be

q

=

m

⋅

c

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Δ

T

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q

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Δ

T

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In your case, you will have

q

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g

⋅

4.18

J

g

∘

C

⋅

(

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−

25.0

)

∘

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=

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Explanation:

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