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3 years ago

What are hormones? How do they work?

1 answer:

4 0

Hormones are chemical messengers that travel throughout the body coordinating complex processes like growth, metabolism, and fertility. They can influence the function of the immune system, and even alter behavior.

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A solid wood door 1.00 m wide and 2.00 m high is hinged along one side and has a total mass of 40.0 kg. Initially open and at re

xxTIMURxx [149]

Answer:

The final angular speed is 0.223 rad/s

Explanation:

By the conservation of angular moment:

ΔL=0

L₁=L₂

L₁ is the initial angular moment

L₂ is the final angular moment

L₁ is given by:

$L_1=L_{door} + L_{mud}$

As the door is at rest its angular moment is zero and the angular moment of mud can be considered as a point object, then:

$L_1= L_{mud}= mvr$

where

r is the distance from the support point to the axis of rotation (the mud hits at the center of the door; r=0.5 m)

v is the speed

m is the mass of the mud

L₂ is given by:

$L_2= (I_{door} + I_{mud}) \omega_f$

ωf is the final angular speed

The moment of inertia of the door can be considered as a rectangular plate:

$I_{door}=\frac{1}{3}MW^2$

M is the mass of the door

W is the width of the door

The moment of inertia of the mud is:

$I_{mud}=mr^2$

Hence,

$L_1=L_2\\mvr= (I_{door} + I_{mud}) \omega_f\\\omega_f=\frac{mvr}{I_{door} + I_{mud}} \\\omega_f=\frac{mvr}{I_{door} + I_{mud}}$

$\omega_f=\frac{0.5kg \times 12m/s \times 0.5m}{\frac{1}{3}40kg(1m)^2+0.5kg \times (0.5m)^2}$

$\omega_f=0.223 \frac{rad}{s}$

6 0

4 years ago

Sir Dudley the Dextrous is loading cannons on top of the castle's tallest towers in preparation for an expected attack. He slips

jeka94

Answer:

786 J

Explanation:

Let g = 9.81 m/s2. The vertical distance that the canon ball must have traveled within 1.65 s is (ignoring air resistance):

$h = gt^2/2 = 9.81*1.65^2/2 = 13.35 m$

So the work done by gravity would be the product of gravity force and the distance it traveled

[tex]E_p = Ph = mgh = 6*9.81*13.35 = 786 J

7 0

3 years ago

A landscaper is making a retaining wall to shore up the side of a hill. to ensure against collapse, the wall should make an angl

Musya8 [376]

Refer to the diagram shown below.

Let x = distance of the base of the ladder from the base of the hill.

By definition,
sin(75°) = x/15
x = 75*cos(75°) = 3.882 ft

Answer:
The distance between the base of the hill and the base of the ladder is 3.9 ft (nearest tenth)

3 0

4 years ago

Bakit Mahalaga Saatin Malaman Ang Ating Mga Hilig?

Lubov Fominskaja [6]

There are other Brainly websites for non-English users.

8 0

3 years ago

Light of wavelength 519 nm passes through two slits. In the interference pattern on a screen 4.6 m away, adjacent bright fringes

Veseljchak [2.6K]

Answer:

The separation of the two slits is 0.456 mm.

Explanation:

Given the wavelength of light = 519 nm

The indifference pattern = 4.6 m

Adjacent bright fringes = 5.2 mm

In the interference, the equation required is Y = mLR/d

Here, d sin theta = mL

L = wavelgnth

For bright bands, m is the order = 1,2,3,4

For dark bands, m = 1.5, 2.5, 3.5, 4.5

R = Distance from slit to screen (The indifference pattern)

Y = Distance from central spot to the nth order fringe or fringe width

Thus, here d = mLR/Y

d = 1× 519nm × 4.6 / 5.2mm

d = 0.459 mm

3 0

4 years ago