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3 years ago

Why am alive??????????????

Physics

2 answers:

Alex777 [14]3 years ago

7 0

Answer:

because i love you <3

Explanation:

iren [92.7K]3 years ago

6 0

Answer:

I have also wondered this.

Explanation:

Biology, genetics, and overall life science are missing the answer to this:

"What makes the particles in our DNA group together and carry out functions? How did the first life come about? Why can't our bodies just keep growing as we age and not die? How did life get on Earth? How exactly do different compounds make life? Is there really a purpose of life? Is there really a specific set of guidelines to specify what is nonliving and what is alive.

This is where religion comes in, and there should be no discrimination towards other religions. It is just someone else's beliefs. You can believe anything you want. Just do not act unintelligently or be against any religion etc.

If you are talking about wanting to die( Brainly says I can't use the word), don't do it. You can find help somewhere if you actually want to look for it. Depression can get you down but don't do drugs, it will only make it worse.

No purpose of life has been scientifically proven, but that does not mean you have to die. Wait to die of old age to see if there is an afterlife. Enjoy life while you have it. Some old people are probably thinking "I wish I did more in my life and learned to enjoy every bit of it" before they die and see if there is an afterlife. And if you learn there is an afterlife, don't be like "I told you so" because you should respect other people's beliefs, and anyways you can't tell a living person that because you are dead. Unless you are a ghost, but that is another disputed matter.

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A pulley requires you to pull 3 times the amount of rope in order to lift an object. Therefore, the mechanical advantage is ____

RideAnS [48]

<h3>Answer:</h3>

<h3>Explanation:</h3>

A pulley is an example of a simple machine that is made up of ropes and wheels.
Mechanical advantage refers to the number of times that a simple machine multiplies the input force.
This means if a simple machine has a mechanical advantage of 5 then it means that it made the work done 5 times easier than without it.
It also means that one would apply 1/5 times the force they would have applied without the machine.
In this case, the pulley which is a simple machine requires you pull 3 times the amount of the rope. Therefore, the mechanical advantage of the machine is 1, which means the output force is equal to the input force.

6 0

3 years ago

Which of the following is true?

cluponka [151]

The moon and the Earth attract each other, with equal gravitational forces.

That may not sound too surprising.
But what do you think of THIS one:

-- You and the Earth attract each other, with equal gravitational forces.

-- Your weight on Earth is the same as the Earth's weight on you.

8 0

3 years ago

Read 2 more answers

You're driving down the highway late one night at 20 m/s when a deer steps onto the road 49 m in front of you. You reaction time

Leno4ka [110]

Answer:

v = 26.7 m/s

Explanation:

Given,

speed of the car = 20 m/s

distance between the car and the deer = 49 m

time taken to press the brake = 0.50 s

maximum deceleration of the car = 10 m/s²

Now,

distance travel by the car in 0.5 s = u x t = 20 x 0.5 = 10 m

distance travel by the car after the break is pressed

Using equation of motion

v² = u² + 2 a s

0² = 20² - 2 x 10 x s

s = 20 m

Total distance travel by the car = 20 + 10 = 30 m

Distance between deer and car = 49-30 = 19 m.

b. Maximum speed a car could have

Distance travel by the car in reaction time = v' x 0.5

v' is the maximum speed of the car.

maximum distance car can cover = 49 - 0.5 v'

Now, Using equation of motion

v² = u² + 2 a s

0² =v'² - 2 x 10 x (49- 0.5 x v')

v'² +10 v' -980 = 0

By solving

v = 26.7 m/s

Hence, maximum speed of the car can be 26.7 m/s

4 0

3 years ago

In an experiment, a disk is set into motion such that it rotates with a constant angular speed. As the disk spins, a small spher

boyakko [2]

Answer:

L₀ = L_f , K_f < K₀

Explanation:

For this exercise we start as the angular momentum, with the friction force they are negligible and if we define the system as formed by the disk and the clay sphere, the forces during the collision are internal and therefore the angular momentum is conserved.

This means that the angular momentum before and after the collision changes.

Initial instant. Before the crash

L₀ = I₀ w₀

Final moment. Right after the crash

L_f = (I₀ + mr²) w

we treat the clay sphere as a point particle

how the angular momentum is conserved

L₀ = L_f

I₀ w₀ = (I₀ + mr²) w

w = $\frac{I_o}{I_o + m r^2}$ w₀

having the angular velocities we can calculate the kinetic energy

starting point. Before the crash

K₀ = ½ I₀ w₀²

final point. After the crash

K_f = ½ (I₀ + mr²) w²

sustitute

K_f = ½ (I₀ + mr²) ( $\frac{I_o}{I_o + m r^2}$ w₀)²

Kf = ½ $\frac{I_o^2}{ I_o + m r^2}$ w₀²

we look for the relationship between the kinetic energy

$\frac{K_f}{K_o}$ = $\frac{I_o}{I_o + m r^2}$

$\frac{K_f}{K_o } < 1$

K_f < K₀

we see that the kinetic energy is not constant in the process, this implies that part of the energy is transformed into potential energy during the collision

6 0

3 years ago

What is the thinnest soap film (excluding the case of zero thickness) that appears black when illuminated with light with a wave

Firlakuza [10]

Answer:

thinnest soap film is 206.76 nm

Explanation:

Given data

wavelength = 550 nm

index of refraction n = 1.33

to find out

What is the thinnest soap film

solution

we have wavelength λ = 550 nm

that is λ = 550 × $10^{-9}$ m

and n = 1.3

we will find the thickness of soap film as given by formula that is

thickness = λ/2n

thickness = 550 × $10^{-9}$ / 2(1.33)

thickness = 206.76 × $10^{-9}$ m

thinnest soap film is 206.76 nm

7 0

3 years ago