Chemistry, 19.08.2019 11:00 TrueKing184

You are walking in paris alongside the eiffel tower and suddenly a croissant smacks you on the head and knocks you to the ground. from your handy dandy tourist guidebook you find that the height of the eiffel tower is 300.5 m. if you neglect air resistance, calculate how many seconds the croissant dropped before it tagged you on the head.

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Answer from: hunterthompson2

The time taken for the croissant to hit you on the head assuming you are 1.5 m tall is 7.73 s

Considering the question given above, your height was not stated.

Let your height be 1.5 m

Thus, the height of the Eiffel Tower to your head will be:

Height (h) = (Total height of tower) – (Your assumed height)

Total height of tower = 300.5 m

Your assumed height = 1.5 m

Height (h) = 300.5 – 1.5

Height (h) = 299 m

Finally, we shall determine the time taken for the croissant to hit you on the head.

Height (h) = 299 m

Acceleration due to gravity (g) = 10 m/s²

Time (t) =?

H = ½gt²

299 = ½ × 10 × t²

299 = 5 × t²

Divide both side by 5

$t^{2} = \frac{299}{5}\\\\t^{2} = 59.8$

Take the square root of both side

$t = \sqrt{59.8}$

t = 7.73 s

Therefore, the time taken for the croissant to hit you on the head assuming you are 1.5 m tall is 7.73 s

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Answer from: bellamore

Neglecting air resistance (that is, if you and the Eiffel Tower were in a giant vacuum chamber), the bagel would take 7.804 s to hit you on the head.

I will assume that you are 1.8 m tall, so the distance the bagel falls before it hits you on the head is

300.5 m - 1.8 m = 298.7 m

One of the important equations relating distance and acceleration is

s = v₀ +½at², where

s = distance,
v₀ = initial velocity,
a = acceleration, and
t = time.

I also assume that the person at the top of the tower didn't throw the bagel down at you, so v₀ = 0.

a is the acceleration due to gravity, which is 9.8099 m·s⁻² in Paris.

s = v₀ + ½ at²

298.7 m = 0 + ½ × 9.8099 m·s⁻² × t²

298.7 = 4.9050 t² s⁻²

t² = $\frac{298.7 \text m}{ 4.9050 \text s^{-2}}$ = 60.898 s²

t = $\sqrt{60.898 s^{2}}$ = 7.804 s

Answer from: Quest

a mercury barometer is a device that uses the physical properties of mercury in a tube to measure barometric pressure. mercury barometers are used for : -

1. measurement of atmospheric pressure

2. determining the altitude of a place

3. weather forecasting

4. calibration and checking of aneroid barometers

5. application in fluid mechanics

6. measurement of pressure in aircrafts

7. surface weather analysis

8. preparation of barographs

9. usage in physical sciences like physics, astronomy & chemistry

10. preparation of aircraft altimeters

characteristics of mercury barometer : -

1.used to define and measure atmospheric pressure.

2.on the average at sea level the column of mercury rises to a height of about 760 mm.

3.this quantity is equal to 1 atmosphere.

4.it is also known as standard atmospheric pressure.

5.a barometer in which the weight of a column of mercury in a glass tube with a sealed top is balanced against that of the atmosphere pressing on an exposed cistern of mercury at the base of the mercury column, the height of the column varying with atmospheric pressure.

Write 15 uses of a mercury barometer along with its characterestics

Answer from: Quest

Idon't know hope someone you

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You are walking in paris alongside the eiffel tower and suddenly a croissant smacks you on the head...

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