describe what happened to ann when she was left alone in the house with her grand mother
class 7th
please tell me the answer
Answers
Answer:
Given that:-
A train running at a speed of 84 km/h
The train crosses a electric pole at 9 seconds
We need to find the length of the train.
Let's Do!
What we can do here, is first convert the given units into SI units.
84 km/h => m/s
1 metre = 1000 km
1 hour = 3600 seconds
\sf{Kmph = \dfrac{1000}{3600} = \dfrac{5}{18} \ After \ simplification}Kmph=
3600
1000
=
18
5
After simplification
So, we can now multiply 84 with 5/18
It was just a shortcut method, you can use it directly as well.
So, we get:-
\sf{\dfrac{84 \times 5}{18}}
18
84×5
\sf{ = 23.33 \ mps \ approximately}=23.33 mps approximately
mps means metre/second.
Now, we know that
\boxed{\sf{Speed = \dfrac{Distance}{Time} }}
Speed=
Time
Distance
\boxed{\sf{\mapsto Distance = Speed \times Time}}
↦Distance=Speed×Time
Now, we need is length ie Distance.
So, 23.33*9 = 209.97 metres is the length of the train.
.
the function of kidney is remove the poisonous substance urea other waste salt other excess water from the blood and excrete them in the form of yellowish liquid called urine .
each kidney is made up of large number of excretory units called in nephron consists of boumans capsules and tribule.
Bouman,s capsule contain a bundle of blood capillaries called glomerulus.
one end of the glomerlus is attached to the rainal artery which bring the dirty blood containing the urea waste into it
The other end of the glomerulus comes out the bouman capsule as a blood capillaries Surround the tribal of nephron and finally join a rainal vein.
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