not understanding this, please help out

Answer:

thermal energy

Explanation:

heat transfers into it causing it to physically change

Answer:

A pesar de las diferencias entre cada copo de nieve y las grandes familias de copos que existen, estos todavía tienen una base hexagonal. Esta estructura hexagonal se explica por la forma en que las moléculas de agua se unen para formar un cristal

Despite the differences between each snowflake and the large families of flakes that exist, they still have a hexagonal base. This hexagonal structure is explained by the way in which water molecules come together to form a crystal.

Explanation:

mn

The runner's total distance covered was 800 meters.  Her displacement (straight-line distance between start-point and end-point) was zero.

Her average speed = (distance)/(time) = 4.04 m/s

Her average velocity = (displacement) / (time) = zero (choice - c)

Answer:

strengthens ur muscles

Answer:

Light can make things happen when it is shining.

                        (or glowing)

Answer:

Give them assignment on the pandemic.

Explanation:

If you wish, each student can talk about some other aspect of the pandemic that seems important and interesting then you have to give them the assignment of presentation and give reward on them. The students will definitely make the presentation on other aspects of the pandemic and when they present it in the class it enhance the knowledge of other students as well.

Answer:

Frequency.

Explanation:

More energy = shorter wavelength = greater frequency

Answer:

a = 0.45 m/s²

Explanation:

The given question is ''Calculate the acceleration that produces a force of 40 N on a body with 88 kg of mass".

Given that,

Force, F = 40 N

Mass of the body, m = 88 kg

The net force acting on the body is given by :

F = ma

Where

a is the acceleration of the body

[tex]a=\dfrac{F}{m}\\\\a=\dfrac{40\ N}{88\ kg}\\\\a=0.45\ m/s^2[/tex]

So, the required acceleration is 0.45 m/s².

Answer:

b

Explanation:

The statement which represents an endothermic reaction is using a heat pack on an injury.

An endothermic reaction is a type of chemical reaction that absorbs heat energy from the surroundings. In other words, in an endothermic reaction, energy is taken in from the environment as the reaction proceeds, resulting in a decrease in the temperature of the surroundings.

Endothermic reactions require an input of energy to occur, usually in the form of heat, light, or electricity. This energy is used to break the bonds between atoms or molecules in the reactants, and the products formed have higher potential energy than the reactants. The excess energy is absorbed from the surroundings to compensate for this increase in potential energy.

Examples of endothermic reactions include melting ice, evaporating water, and baking soda reacting with vinegar to produce carbon dioxide gas. These reactions require an input of energy to occur and absorb heat from the surroundings, resulting in a decrease in the temperature of the surrounding environment.

Here in this question,

Endothermic reactions absorb heat energy from the surroundings, meaning that they require energy input to proceed. In the case of using a heat pack on an injury, energy is required to activate the reaction that produces heat and provides warmth to the injured area. This process absorbs heat from the environment, making it an endothermic reaction.

In contrast, wood burning in a fire and TNT exploding are exothermic reactions because they release heat energy into the surroundings, which means that they produce heat as a byproduct. The splitting of a gas molecule is not an endothermic or exothermic reaction, but rather a chemical reaction that can be either endothermic or exothermic depending on the specific reaction and conditions involved.

Therefore, The correct answer is using a heat pack on an injury.

To find more on  Exo and Endo thermic  reaction​ click :

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Answer:

a = 5 m / s²   and    x = 562.5 m

Explanation:

Let's apply the kinematics relations

          v = v₀ + at

          v² = v₀² + 2a x

In this case, as the car stops, its final speed is zero (v = 0) and the acceleration must be opposite to the speed, that is, negative

           0 = v₀ - a t

           a = v₀ / t

let's calculate

           a = 75/15

           a = 5 m / s²

let's look for the distance

           0 = v₀² - 2a x

           x = v₀² / 2a

let's calculate

           x = [tex]\frac{75^2}{2 \ 5 }[/tex]

           x = 562.5 m

Answer:

C would be the correct answer

Answer:

It has to have a whistle device on the spout. When boiling occurs, water vapour displaces air above the water which has to escape through the whistle hence activating the required vibrations. Thereafter, the continuing supply of steam does the same job until the cook involves turns off the heat. The whistle is not made to exacting scientific standards and there is no doubt a range of pressures above which it will work it. It would be interesting to know how you observed the water boiling without using a transparent kettle.

Explanation:

hope it helps

Answer:

I would use the model of Ammonia because it helps you visualize the structure of NH3 better than the description. It would be easier to understand the structure of it if you can see it, rather than reading its description.

Answer:

It is cold at saturn and far away

Explanation:

Answer:

Impulse

Explanation:

Impulse is force times time

Answer:

Natural selection is a mechanism, or cause, of evolution.

Explanation:

Adaptations are physical or behavioral traits that make an organism better suited to its environment. Heritable variation comes from random mutations.

Answer:

A. Analog signal

Explanation:

:)

Answer: Wave speed= frequency x wavelength

=20 x 3

=60 m/s

Explanation:

Answer: im pretty sure it is D

Explanation:

Answer:

There should be a certain age limit Idon't know

Explanation:

That completely depends on the radius of the particle's path.  

That is, the radius of the wheel the particle is riding on, and exactly where on the wheel the particle is riding.

This information is not included in the question, so no answer is possible.

Answer:

La distancia entre los dos cuerpos es aproximadamente 1.269 milímetros.

Explanation:

Asumamos que ambos cuerpos son partículas, la fuerza de atracción ([tex]F[/tex]), en newtons, entre ambos cuerpos se define mediante la Ley de Newton de la Gravitación Universal, cuya ecuación es:

[tex]F = G \cdot \frac{m_{1}\cdot m_{2}}{r^{2}}[/tex] (1)

Donde:

[tex]G[/tex] - Constante de la gravitación universal, en metros cúbicos por kilogramo-segundo cuadrado.

[tex]m_{1}, m_{2}[/tex] - Masas de los cuerpos, en kilogramos.

[tex]r[/tex] - Distancia entre los cuerpos, en metros.

Si sabemos que [tex]G = 6.674\times 10^{-11}\,\frac{m^{3}}{kg\cdot s^{2}}[/tex], [tex]m_{1} = 0.48\,kg[/tex], [tex]m_{2} = 0.196\,kg[/tex] y [tex]F = 3.9\times 10^{-6}\,N[/tex], entonces la distancia entre los dos cuerpos es:

[tex]r = \sqrt{\frac{G\cdot m_{1}\cdot m_{2}}{F} }[/tex]

[tex]r \approx 1.269\times 10^{-3}\,m[/tex]

Es decir, la distancia entre los dos cuerpos es aproximadamente 1.269 milímetros.

Answer:231.756757

Explanation:

(4)(343/2.96(2)= 231.756757

Answer:

The answer is 231.757 trust

Explanation:

star

Answer:

the cause of variation gravity

Answer:

Heavier Objects Don't Hit the Ground First

Answer:

Plastic is not a good conductor of electricity.

Explanation:

Hope it helps!

If you dont mind can you please mark me as brainlest?

Answer:

51°

Explanation:

Please see attached photo for explanation.

In the diagram, R is the resultant and θ is the angle of the displacement of the resultant.

The value of θ can be obtained as follow:

Angle θ =?

Opposite = 4.5 miles

Adjacent = 3.7 miles

Using Tan ratio:

Tan θ = Opposite / Adjacent

Tan θ = 4.5 / 3.7

Tan θ = 1.2162

Take the inverse of Tan

θ = Tan¯¹ 1.2162

θ ≈ 51°

Thus, the angle of the displacement of the resultant is 51°

Explanation:

an electrical load is the part of an electrical circuit in which current is transformed into something useful. examples include a lightbulb, a resistor and a motor. a load converts electricity into heat, light or motion. put another way, the part of a circuit that connects to a well-defined output terminal is considered an electrical load.

Answer: Any sound cannot be heard through a glass bell jar because a vacuum is created in the jar and sound cannot travel without a medium like gases, solids or liquids

Answer:

the glass hids it and the vibration of the phone is the way you hear it