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rodikova [14]
3 years ago
15

You wish to cook some pasta and so take some water and heat it on a stove. If you use 2000 grams of water with an initial temper

ature of zero degrees C, how much energy would you need to add to raise the temperature to 100° C is all of the stove energy went into heating the water?
Physics
1 answer:
Ronch [10]3 years ago
3 0

Answer:

the stove energy went into heating water is 837.2 kJ.

Explanation:

given,

mass of water = 2000 grams

initial temperature = 0° C

Final temperature = 100° C

specific heat of water (c) = 4.186 joule/gram

energy = m c Δ T                            

            = 2000 × 4.186 × (100° - 0°)

            = 837200 J                          

             = 837.2 kJ            

hence, the stove energy went into heating water is 837.2 kJ.

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8.40 is your answer.

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2 years ago
Amy crashed her bike into the fence. She was thrown over it onto the lawn. Which Newton law applies
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Answer:

Newton's First Law of Motion applies here.

Explanation:

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<u>Newton's First Law of Motion applies here.</u>

7 0
2 years ago
An airplane undergoes the following displacements: First, it flies 40 km in a direction 30° east of north. Next, it flies 56 km
goldfiish [28.3K]

Answer:

Distance from start point is 72.5km

Explanation:

The attached Figure shows the plane trajectories from start point (0,0) to (x1,y1) (d1=40km), then going from (x1,y1) to (x2,y2) (d2=56km), then from (x2,y2) to (x3,y3) (d3=100). Taking into account the angles and triangles formed (shown in the Figure), it can be said:

x1=d1*cos(60), y1=d1*sin(60)\\\\ x2=x1 , y2=y1-d2\\\\ x3=x2-d3*cos(30) , y3=y2+d3*sin(30)

Using the Pitagoras theorem, the distance from (x3,y3) to the start point can be calculated as:

d=\sqrt{x3^{2} +y3^{2} }

Replacing the given values in the equations, the distance is calculated.

4 0
3 years ago
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3 years ago
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