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3 years ago

When the temperature of water increases from room temperature to 90C the process of heating the water is...

Physics

2 answers:

ololo11 [35]3 years ago

7 0

Answer:

endothermic

Explanation:

Endothermic processes occur when a system increases in temperature which is usually caused by a heat transfer from its surroundings.

vivado [14]3 years ago

4 0

Answer:

endothermic

Explanation:

Endothermic means that the substance involved in the transformation, in this case water, absorbs heat energy from its surroundings, as a consequence its temperature increases, in this case water temperature increases from room temperature to 90°C.

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A jogger runs at a constant rate of 10.0 m every 2.0 seconds. The jogger starts at the origin and runs in the positive direction

Elis [28]

Answer:

(a) 25 m

(b) 75 m

Explanation:

Given that the jogger runs at a constant rate of 10.0 m every 2.0 seconds.

So, the speed of the jogger,

$v=\frac{10}{2}=5m/s\;\cdots(i)$

Let d be the distance covered by him in time, t s.

As distance=(speed) x (time)

So, $d=vt$

From equation (i)

$\Rightarrow d=5t\;\cdots(ii)$

As the jogger starts from origin, so, the distance, $d$ , also represents the position of the jogger at the time $t$ s.

The position-time graph has been shown.

(a) From equation (ii), for t=5.0 s

$d=5\times 5=25 m$

So, the jogger is at a distance of 25 m from the origin.

(b) Similarly, for t=15.0 s

$d=5\times 15=75 m$

So, the jogger is at a distance of 75 m from the origin.

8 0

3 years ago

A reconnaissance plane flies 545 km away from

Nikolay [14]

Answer:

681.6/ms

Explanation:

A reconnaissance plane flies 545 km away from its base at 568 m/s. then flies back to its base at 852 m/s.

What is its average speed?

Answer in its of m/s

Avg speed of the round trip is

2*568*852/(568+852)= 681.6/ms

6 0

3 years ago

With the aim of a diagram describe how a rain bow is formed

Natalija [7]

Answer:

Water droplets acts as tiny prism in the sky. The sunlight when enters these tiny droplets undergo internal reflection and also refract these rays which are dispersed causing a band of seven colors called rainbow.

Explanation:

3 0

2 years ago

Read 2 more answers

Small evidence is also called what?

siniylev [52]

Small evidence is also called trace evidence.

4 0

3 years ago

Hello help me pls! i need serious help

9966 [12]

Answer:c