The addition of electron shells results in _____
from the nucleus.
shielding of electrons
Answer here

Hardness, color , and luster.

But since you can pick one, I would say hardness

Answer:

23

Explanation:

Answer: The force of gravity

Answer:

because of its mass. Momentum is directly propotional to the mass of a body

Answer:

Mass

Explanation:

A tennis ball has a mass of around 57 grams and a cricket ball has a mass of around 156 grams. It's much easier to catch a fast moving tennis ball because it is lighter than a cricket ball. Hope this helps x

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:

Hope this helps!! Please consider marking brainliest! Have a good one!!

Answer:

The correct answer is b.

Answer:

C

Explanation:

I did this on edge an that was the answer

Answer:

* viajan a través del aire, liquido o solido

*Moverse en la misma dirección que el flujo de energía

Explanation:

En el análisis de ondas existen dos tipo fundamentales: Transversales y longitudinales.

La ondas transversales las oscilación de la partícula es perpendicular al movimiento de la misma.

En la onda longitudinal el movimiento de la partícula es en la misma dirección que el movimiento de la onda, por esta razón están ondas se llaman ondas de compresión.

En base a las definiciones iniciales las frases correctas son:

* viajan a través del aire, liquido o solido

*Moverse en la misma dirección que el flujo de energía

Answer:

Cause molecules to vibrate

Travel through air, liquid, or solid

Move in the same direction as energy flow

Explanation:

Answer:

No, we should not pay attention to these opinions. (Find the essay below)

Explanation:

Celebrities are people who are prominent or well known because of the work that they do. Actors and sports stars are rightly classified as celebrities because their work affords them a lot of exposure. We see them on television, the internet and social media, and hear about their deeds and accomplishments on the radio.

This group of people always have their opinions about life and other topics of interest which they air when interviewed or when they decide to volunteer the information on their own accord. Most times fans who love them value their opinion so much that they even adjust to them or view it as the standard. For these fans, celebrities are their role models. They tend to copy their hairstyles, modes of dressing, and their opinions! Advertisers key to this fact when they use them to promote their goods.

It is very wrong to hold the opinions and actions of celebrities as the gold standard because they are imperfect and are prone to mistakes. Celebrities are just like any other one of us who have opinions or behave in ways that are sometimes wrong. Copying their every move, action, and opinions would be potentially damaging to us. Their opinions should be taken with a pinch of salt.

It is important that while fans maintain the love they have for their favorite celebrities, they also endeavor to have a mind of their own. Each person should know what works for him or her and live by such. It would be a great mistake to be easily carried away by the opinions of others.

Conclusively, balance is key. Love for celebrities should never cloud an individual's thinking. When this is done, future heartaches that come from adhering to wrong opinions can be avoided.

We should not pay attention to the opinions and actions that are portrayed by the media about celebrities.

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Answer:

0.54m

Explanation:

Step one:

given data

length of seesaw= 3m

mass of man m1= 85kg

weight = mg

W1= 85*10= 850N

mass of daughter m2= 35kg

W2= 35*10= 350N

distance from the center= (1.5-0.2)= 1.3m

Step two:

we know that the sum of clockwise moment equals the anticlockwise moment

let the distance the must sit to balance the system be x

taking moment about the center of the system

350*1.3=850*x

455=850x

divide both sides by  850

x=455/850

x=0.54

Hence the man must sit 0.54m from the right to balance the system

Answer:

i think it's a or c hope it helps :)

Explanation:

u don't have to give brainliest tho it's fine save ur points :)

Answer:

35.7m

Explanation:

Given parameters:

Mass of rock  = 25kg

Time of fall  = 2.7s

Unknown:

Height of the building = ?

Solution:

To solve this problem, we will use one of the motion equations;

     S  = ut + [tex]\frac{1}{2}[/tex] gt²

S is the height

u is the initial velocity  = 0m/s

t is the time

g is the acceleration due to gravity

      S = (0 x 2.7) +  [tex]\frac{1}{2}[/tex] x 9.8 x 2.7²  = 35.7m

Answer:

Explanation:

The work done by an object can be found by using the formula

workdone = force × distance

From the question we have

workdone = 45 × 15

We have the final answer as

Hope this helps you

Answer: negatively charged particles move from one point to another

Explanation:

In electricity, negatively charged particles move from one point to another.​ The correct option is D.

Electric current is what causes electricity to exist and move. We can transmit energy using electricity so that we can carry out easy tasks.

The movement of electrons through conductors like copper wires is its most well-known manifestation. Electrical energy is commonly referred to as "electricity."

The flow of electrical power, commonly referred to as a charge, is the source of the energy type known as electricity.

Our homes, lights, and electrical devices are all powered by electricity. Resources including coal, energy, natural gas, and oil are used to generate power.

Particles that are negatively charged in electricity travel from one location to another.

Thus, the correct option is D.

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Answer: 1.8 x 10-4 W/m^2

Explanation:

Answer:

b

Explanation:

a=v2/r

=0.89^2/2.8

=0.2828...

=0.28

The centripetal acceleration of the child sitting on a merry-go-round 2.8 m from the center will be 0.283 m/s².

Centripetal acceleration is the constant change in velocity necessary for an object to maintain a circular path. We can write the formula for centripetal acceleration as -

a[C] = v[T]²/r

where -

v[T] is tangential velocity

r is radius

Given is a child is sitting on a merry-go-round 2.8 m from the center and the tangential velocity of the ride is 0.89 m/s.

We can write -

Radius [r] = 2.8 m

Tangential velocity = v[T] = 0.89 m/s.

Using the formula for centripetal acceleration -

a[C] = v[T]²/r

a[C] = (0.89 x 0.89)/2.8

a[C] = 0.283 m/s²

Therefore, the centripetal acceleration of the child sitting on a merry-go-round 2.8 m from the center will be 0.283 m/s².

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Answer:

4km

Explanation:

Distance=speed x time

Knowing this we know the time and speed

so it is 8 x .5= D

And 8 x .5 =4

If you have any questions let me know

Answer:

[tex]g'=10.78\ m/s^2[/tex]

Explanation:

The time period of a simple pendulum is given by :

[tex]T=2\pi \sqrt{\dfrac{L}{g}}[/tex]

L is length of the pendulum and g is acceleration due to gravity

At the bottom of Death valley, g = 9.8 m/s²

We need to find the value of g if the period of the pendulum is decreased by 5.00%.

T'=(T-0.05T)= 0.95 T

[tex]T\propto \dfrac{1}{\sqrt{g} }\\\\\dfrac{T}{T'}=\sqrt{\dfrac{g'}{g}}\\\\\dfrac{T}{0.95T}=\sqrt{\dfrac{g'}{9.8}}\\\\\dfrac{1}{0.95}=\sqrt{\dfrac{g'}{9.8}}\\\\1.1=\dfrac{g'}{9.8}\\\\g'=10.78\ m/s^2[/tex]

So, the new value of acceleration due to gravity is [tex]10.78\ m/s^2[/tex].

Answer:

C

YExplanation:

Answer:

A car

Explanation:

A car can travel 100 m in 5 seconds

Hope this helps!

Answer:

.

Explanation:

Answer:

the pelvice

Explanation:

Answer:

bouyant force - the upward force on an object in a fluid

boiling point - the temperature at which a liquid becomes a gas

solubility - the ability of a substance to dissolve in another

conductivity- the ability to transfer heat or electricity

density - the amount of mass in a given volume

Answer:

Explanation:

From the given information:

We can estimate the  cross-sectional area of the pipe by using the formula:

[tex]A_c = \dfrac{\pi}{4} D^2[/tex]

[tex]A_c = \dfrac{\pi}{4} (6 \times 10^{-2} \ m)^2[/tex]

[tex]A_c = 0.0028274 \ m^2[/tex]

To find the average velocity of the water flowing through the pipe by using the formula;

[tex]V = \dfrac{\mathtt{V}}{A_c}[/tex]

[tex]V = \dfrac{10 \times 10^{-3} \ m^3/s}{0.0028274}[/tex]

[tex]V = 3.537 \ m/s[/tex]

However, the Reynolds number can be determined by using the equation

[tex]Re= \dfrac{\rho \times V \times D}{\mu}[/tex]

[tex]Re= \dfrac{(999.1 \ kg/m^3) \times (3.537 \ m/s) \times (6 \times 10^{-3} \ m)}{1.138 \times 10^{-3} \ kg/m.s}[/tex]

Re = 18631.7225

From above, Re> 4000, thus, the flow will be turbulent.

By using Colebrook's equation in a turbulent flow; we have the following expression for Colebrook's equation:

[tex]\dfrac{1}{\sqrt{f}}= -2.0 \ log \bigg ( \dfrac{\epsilon/D_h}{3.7}+ \dfrac{2.51}{Re \sqrt{f}} \bigg )[/tex]

where;

[tex]f[/tex] = frictional force = ???

[tex]\epsilon[/tex] = roughness of steel= 0.002 mm

Replacing our values into the above equation, we have:

[tex]\dfrac{1}{\sqrt{f}}= -2.0 \ log \bigg ( \dfrac{ 2\times 10^{-6 \ m }/6 \times 10^{2 }\ m}{3.7}+ \dfrac{2.51}{18631.7225 \sqrt{f}} \bigg )[/tex]

By solving the above equation for f; we get

f = 0.026409

The pressure drop in flow;

[tex]\Delta P_L = f \dfrac{L}{D} \dfrac{\rho V^2}{2}[/tex]

[tex]=0.026409(\dfrac{29}{0.06})(\dfrac{999.1*3.537^2}{2})[/tex]

= 79771.50524 Pa

= 79.772 kPa

The pressure drop = 79.772 kPa

The head loss in the pipe:

[tex]h_L = \dfrac{\Delta P_L}{\rho g}[/tex]

= [tex]\dfrac{79771.50524 }{999.1 * 9.81}[/tex]

= 8.14 m

The power input

[tex]W_{pump} = V\Delta P_L[/tex]

=  10 * 10^{-3} * 79771.50524

= 797.72 W

Answer:

I would think the first and the third answer

Answer:

i would say 3rd cause other may slightly effect

Answer:

W = 600 N

Explanation:

The mechanical advantage of any machine is the ratio of the load or weight to the effort applied. Hence, the general formula for mechanical advantage is as follows:

M.A = W/P

where,

M.A =Mechanical Advantage of Hammer = 10

W = Maximum force that could be generated = ?

P = Force created by me = 60 N

Therefore,

10 = W/60 N

W = 10*60 N

W = 600 N

Explanation:

For most temperature scales, the boiling point of water and the freezing point is used to calibrate it.

Three known temperature scales;

                               Kelvin scale              Celcius scale          Fahrenheit scale

Freezing point             273K                            0°C                        32°F

Melting point                373K                          100°C                     212°F

Answer:

[tex]a=0.611\ m/s^2[/tex]

Explanation:

Given that,

Mass of a refrigerator, m = 90.01 kg

She is able to slide the refrigerator across the floor with 55  N of force.

We need to find the acceleration of the refrigerator.

Let it is a. Using second law of motion:

F = ma

[tex]a=\dfrac{F}{m}\\\\a=\dfrac{55\ N}{90.01\ kg}\\\\a=0.611\ m/s^2[/tex]

So, its acceleration is [tex]0.611\ m/s^2[/tex].