A dog walks 21 m north and then walks 35 m west to bury a bone. What is the displacement of the dog?

Answer:

The law of conservation of mass or principle of mass conservation states that for any system closed to all transfers of matter and energy, the mass of the system must remain constant over time, as the system's mass cannot change, so quantity can neither be added nor be removed

Explanation:

Answer:

-54.9

Explanation:

Answer:

Atoms

Explanation:

That's what everything is made up of.

Answer:

Explanation: I think its D

Answer:

A)Opposite direction

Explanation:

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Answer: B) weight

Explanation: Your mass does not change on the moon

Answer:

The pressure of the air molecules inside the pen cap increases and the volume occupied by the air decreases such that the combined volume occupied by the pen cap and the air volume reduces while the combined mass of the pen cap and the air molecules remain the same

Given that density = The mass/Volume, we have that the density varies inversely as the volume, and as the volume reduces, the density increases

Upon squeezing, therefore, as the new combined density of the pen cap and the air molecules rises to more than the density of the water in the bottle, then, the pen cap air molecule is relatively more denser than the water, which will result in the pen cap sinking to the bottom of the bottle

Explanation:

Answer:

Newton (N)

Explanation:

A newton is the unit of measurement for force

Answer:29.4m/s

Explanation: Vf=Vi +at= 0 initial velocity +(9.8)(3)= 29.4 m/s

Answer:

The various organelles increase the energy used by the cell.

Explanation:

The various different parts of a cell, called as organelles, are beneficial to the cell in different ways such as energy production, protein synthesis, heredity information and packaging of proteins.

An organelle is a specialized part of the cell which serves a specific purpose within the cell. There are various organelles present within a cell and these organelles also vary depending on what kind of cell we are talking about, whether it be a plant or animal cell such as chloroplast and vacuole.

The different organelles in the cell perform different functions such as ribosomes synthesize proteins, mitochondria synthesize ATP, chloroplast involved in photosynthesis, and nucleus contain heredity information of the cell.

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Answer: liquids take the shape of the container they are in, but have definite volume. like liquids the shape of a gas changes with the container. unlike liquids the volume of a gas changes depending on the container it is in

Explanation:

Answer:

liquids flow freely, they take the shape of the container they are in, but have a definite volume. Like liquids, the shape of a gas changes with the container. This is because the atoms in a gas move rapidly and freely to fill any available space. Unlike liquids, the volume of a gas changes depending on the container it

Explanation

Answer:

It should be 1,029.105 m³

But I think you can ignore the 105 because it essentially doesn't make a difference

Answer:

Explanation:

According to Newton's third law of motion, every action has an equal and opposite reaction. When a rocket starts, it releases some gases which exerts and equal and opposite force which helps the rocket to move.

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Answer:

Please elaborate which variation. There are different types of variation

Answer:

polar-molecule

Explanation:

Answer:

Melting point

Explanation:

when a solid turns to a liquid, it is melting

Answer:

Organisms and their environment

Answer:

the answer is 19 ,30 (second) times 0.5= 15

15+4= 19

After Paco drives his scoter west with an initial velocity of 4 m/s and then accelerates at 0.5 m/s² for 30 s, his final velocity is 19 m/s, so the correct option is the fourth.  

The final velocity of Paco can be calculated with the following equation:

[tex] v_{f} = v_{i} + at [/tex]

Where:

[tex] v_{f}[/tex]: is the final velocity =?

[tex]v_{i}[/tex]: is the initial velocity = 4 m/s

a: is the acceleration = 0.5 m/s²

t: is the time 30 s

Hence, the final velocity is:

[tex] v_{f} = 4 m/s + 0.5 m/s^{2}*30 s = 19 m/s [/tex]

Therefore, the correct option is 19 m/s.    

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Answer:

h = 20.36[m]

Explanation:

To solve this problem we must calculate the perimeter (length of a circumference) of the circumference, which is denoted by the following equation:

L = 2*π*r

where:

r = radius = 0.9[m]

π = 3.1416

L = 2*(3.1416)*(0.9)

L = 5.654[m]

Now we know that the pulley or circumference had to rotate 3.6 times to get the water out of the well. In this way the depth of the well can be calculated by means of the following equation:

h = 3.6*L

h = 3.6*5.654

h = 20.36[m]

Answer: Lightning is seen before thunder is heard" is correct about thunderstorms

Explanation:

A "thunderstorm" is a disturbance in weather that is related with lightning, dense clouds, heavy rain, hail or thunder. During a thunderstorm, lightning is always seen before thunder because the speed at which the light travels is faster than that of sound's speed.

Also, thunder's noise could be heard up to 10 km away from lightning flash. The thunder sound lasts for a few seconds. The thunder makes noise because of the rapid and fast expansion of the heating of the air.

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Answer:

because light is faster than sound

Explanation:

the speed of light is 299 792 458 m / s

and the speed of sound is 343 m / s

Answer:

the net force is 10 and it is pushing to the right

Explanation:

The net force is the total and sonce the 20N is overpowering the 10N it will have 10N which will put the 20N ahead

Answer:

The net force is 10 N.

Explanation:

A "net force" occurs when a particular object accelerates. It refers to the total number of forces that act on an object.

The boy pulling the cart and the other pushing it do their actions in the same direction. The force of pulling is 6 N while the force of pushing is 4 N. This means that the total force will not be cancelled.

To get the net force, add both forces since they are in the same direction (east).

Net force = 6 N + 4 N

Net force = 10 N (Newtons)

Answer:

S. offspring recieve a mix of genes from two different parents

Offspring acquire genes that are exactly the same as one parent’s genes. Option B is correct.

Given that,
To choose the statement best explains the genetic variation that results from sexual reproduction.

Sexual reproduction is the process of creating new organisms by combining the genetic details of two individuals of different genders. The genetic details in most animals is carried on chromosomes in the nucleus of reproductive cells called gametes, which unite to form a diploid zygote.

Here,
The solution is due to the fact that each parent has two distinct sets of genes. Furthermore, each parent only passes on half of their DNA to their offspring. And that the half that is passed on is arbitrary. All of this ensures that each child is born with a distinct set of genes.

Thus, Offspring acquire genes that are exactly the same as one parent’s genes. Option B is correct.

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Use the formula for momentum:  Momentum = (mass) x (speed)

2.67 x 10⁴ kg-m/s  =  (mass) x (8.9 m/s)

Mass  =  (2.67 x 10⁴ kg-m/s) / (8.9 m/s)

Mass  =  3,000 kilograms

That's 3 metric tons.  On Earth, it weighs 6,614 pounds, or 3.3 US tons.

It probably performs a lot like my car.

Answer:

47.43 m/s

Explanation:

Given that,

Final speed of a plane, v = 0

Distance, d = 180 m

Acceleration of the plane, a = -6.25 m/s² (deceleration )

We need to find the plane's velocity. Let it was u. So, using the third equation of kinematics as :

[tex]v^2-u^2=2ad\\\\u^2=0^2-2\times (-6.25)\times 180\\\\u=\sqrt{2250} \\\\u=15\sqrt{10}\ m/s\\ \\\text{or}\\\\u=47.43\ m/s[/tex]

So, the plane's velocity when it first touched the landing strip is 47.43 m/s.

Answer:

because of the disturbence beneath the ocean

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Answer:

They both arrive at 1:00 PM

Explanation:

Amount Davien has to drive : 40km

Amount Jackson has to drive = 50km

Davien moves at 40km/h,

Therefore, it only takes Davien 1 hour to get there.

12:00 PM + 1 hour = 1:00 PM

Jackson moves 100km/h

He needs to drive 50 min, so 50/100 = 1/2

It takes him half an hour, or 30minutes

If he leaves at 12:30, then he gets there at 1:00 PM