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ivanzaharov [21]
2 years ago
10

Sana loved swimming.She joined a new smimmimg club .When she looked at the floor of the pool to estimate its depth she found tha

t it was shallow .But when she dived in the pool she found out that the pool was quiet deep.Write down the scientific reason for this situation?
Physics
1 answer:
melisa1 [442]2 years ago
6 0

Answer:

Refraction

Explanation:

When light passes from a rarer medium into a denser medium, it bends in the medium away from the normal. This creates the phenomenon of "apparent depth" as given in the question.

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Why does a typhoon hit a location twice?
Natalka [10]
The reason a location usually doesn't get a storm within a few weeks of another one is more because of the general odds. They're low. And they're lower in Texas than in Florida. ... There are many locations a storm can develop and track
7 0
3 years ago
Scientific knowledge is generally considered to have a positive effect on society. In which situation would scientific knowledge
attashe74 [19]
Scientific knowledge itself cannot have a positive or negative impact on society per se. What can have a negative or positive impact is how this knowledge is being used. 

While we all enjoy a beter life due to advancements in medicine and technology for example, this was because people decided they would put certain scientific discoveries into practice and spread them among the people.

The same thing can also be said for negative scientific discoveries. While energy produced in atomic power plants per se isn't harmful, when making an atomic bomb out of it, it can be disastrous. It was the intention of doing something evil with it that might have had a negative impact on society, not the knowledge itself. 
5 0
3 years ago
A man works on a striaght road from his home to market 2.5km away dwith a speed of 5km/h.Finding the market closed, he instantly
umka21 [38]

Answer:

5.625km/h

Explanation:

We are given that

Distance between home and market, d=2.5 km

Speed, v1=5km/h

Speed, v2=7.5 km/h

We have to find the average speed of the man over the interval of time 0 to 40min.

Time,t=\frac{distance}{speed}

Using the formula

t_1=\frac{2.5}{5}=0.5 h=0.5\times 60=30 min

1 hour =60 min

t_2=\frac{2.5}{7.5}=\frac{1}{3}hour=\frac{60}{3}=20min

Distance traveled by man in 10 min with speed 7.5 km/h=\frac{2.5}{20}\times 10=2.5/2km

Therefore,

Total distance covered=2.5+2.5/2=3.75 km

Time=40 min=40/60=2/3 hour

Average speed=\frac{total\;distance}{total\;time}

Average speed=\frac{3.75}{2/3}=5.625km/h

7 0
2 years ago
What is the average electric current in a wire, when a charge of 150 C passes in 30 s?
NARA [144]
We know, I = Q / t
Here, Q = 150 C
t = 30 s

Substitute their values, 
I = 150 / 30
I = 5 A

In short, Your Answer would be 5 Ampere

Hope this helps!
7 0
3 years ago
HClO4 is stronger acid than HClO? Give reason
mamaluj [8]
HCIO4 is a stronger acid than HCIO because as the number of oxygen increases the oxidation number in the central atom increases which weakens the O-H bond strength and increases the acidity.
8 0
3 years ago
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