3 years ago

Why is it better to breathe through the nose than the mouth?

1 answer:

Citrus2011 [14]3 years ago

3 0

You could get sick by breathing throw your mouth and you have a less chance of getting sick by breathing throw your nose.

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Robert hook used an early microscope to observed a cork sample. How did this help contribute to cell theory?

Lady bird [3.3K]

Answer:

Robert Hooke used an early microscope to observe a cork sample. How did this help contribute to cell theory? It helped to show that cells contain water. ... It helped to show that some cells are visible to the naked eye.

Explanation:

If your teacher checks if it was copied just put it in your on words

3 0

2 years ago

You are on a new planet, and are trying to use a simple pendulum to find the gravity experienced on this new planet. You find th

levacccp [35]

To solve this problem it is necessary to apply the concepts related to the Period based on the length of its rope and gravity, mathematically it can be expressed as

$T= 2\pi \sqrt{\frac{L}{g}}$

g = Gravity

L = Length

T = Period

Re-arrange to find the gravity we have

$g = \frac{4\pi^2 L}{T^2}$

Our values are given as

$L = 0.35m\\T = 2s\\$

Replacing we have

$g = \frac{4\pi^2 L}{T^2}$

$g = \frac{4\pi^2 0.35}{2^2}$

$g = 3.45 m/s^2$

Therefore the correct answer is C.

4 0

2 years ago

Which of the following is an example of observational scientific investigation?

zhuklara [117]

Answer:

The Awnser is C

Explanation:

Placing test tubes in an ice bath for 15 minutes

7 0

3 years ago

After a new aircraft has passed ground and flight tests, the aircraft must receive a series of certificates before it can be mas

ollegr [7]

Answer:

A production certificate Shows that the aircraft met FAA construction and performance standards

Explanation:

Federal Airport Authority (FAA), is the body that check the standard operations of air craft activities in a country.

7 0

3 years ago

An object moving with uniform acceleration has a velocity of 14.0 cm/s in the positive x-direction when its x-coordinate is 2.94

kotykmax [81]

Answer:

-19.9m/s²

Explanation:

Given that

vi = 14cm/s

xi = 2.94 cm

xf=-5.00 cm

t= 1.85s

Using xf-xi= vi t + 1/2at²

Which is = -5-2.94= 14*1.85+1/2a1.85²

= -7.94= 25.9+1.7a

-33.9= 1.7a

a= - 19.9m/s²

8 0

3 years ago