!!!NEED ASAP!!!
Sebastian wants to write the chemical formula for phosphorus tetraoxide. He identifies the chemical symbols as P and O. Which additional step will he take in his process?
A. Identify the elements involved as potassium and oxygen
B. Add a subscript of 4 after O
C write the chemical symbols, in order, as Op
D. Use the prefix tetra before oxygen

Answer:

The MKS system of units is a physical system of measurement that uses the metre, kilogram, and second (MKS) as base units. Adopted in 1889, use of the MKS system of units succeeded the centimetre–gram–second system of units (CGS) in commerce and engineering.

Answer:

Answer a)  Force on A equal to force on B

Answer a) The electric field points to the left in the location A

Explanation:

12)

Recall that the magnitude of the electrostatic force is given by:

[tex]F=k\frac{q*Q}{d^2}[/tex]

therefore in magnitude it is the same for charge q than for charge Q.

(Answer a for the first problem - 12)

13)

Recall that the electric filed points outwards for a positive charge, therefore at the location of charge q, the field must be pointing towards the left.

Answer: 20 m/s

Explanation:

Given

mass of bowling ball m=10 kg

Mass of bowling pin M=20 kg

The initial velocity of ball u=10 m/s

The velocity of the pin after collision [tex]v_2=15\ m/s[/tex]

Conserving linear momentum as there is no external force applied

[tex]mu=mv_1+Mv_2\quad \quad (v_1=\text{velocity of ball after collision})[/tex]

[tex]10\times10=10\times v_1+20\times15\\10v_1=100-300\\v_1=-20\ m/s[/tex]

i.e. ball started moving in the direction opposite of its initial direction with a velocity of 20 m/s

The ball moves backwards with a velocity of -20m/s

The data given are;

This law states that assuming no external forces are acting, when two bodies collide together, the sum of their initial momentum remains constant and it's not changed by their collision.

Applying the law of conservation of linear momentum

[tex]m_1u_1+m_2u_2=m_1v_1+m_2v_2\\(10*10) + (20*0) = (10*v_1)+(20*15)\\100+0=10v_1+300[/tex]

collect like terms

[tex]100=10v_1+300\\100-300=10v_1\\-200=10v_1\\v_1=\frac{-200}{10}\\v_1=-20m/s[/tex]

This shows that the balls moves backwards hence the reason why it have a negative velocity.

From the calculation above, the ball moves backwards with a velocity of -20m/s.

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Answer:

2 N/kg

- The explanation for it is quite complicated, especially to type it out but I hope this helps.

The magnitude of the gravitational field should be 2 N/kg.

Since Planet X has twice earths mass and three times earths radius.

So,

we know that  

[tex]g = GM\div r^2[/tex]

here, G = gravitational constant

M = mass of the planet

r = radius of the planet

So,

[tex]g\div gx = (M1\div M2) \times (r2\div r1) ^{2}\\\\9.8\div gx = (1\div 2) \times (3\div 1) ^2\\\\gx = 2.18 m/s^2[/tex]

So it is nearly 2 N/kg

hence, The magnitude of the gravitational field should be 2 N/kg.

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Answer:

b

Explanation:

the different ways the molecules are arranged in the atom creates differ states of matter and different appearences.

Explanation:

In a balanced equation, the total number of atoms of each element on the reactant side is equal total number of atoms on the product side

answer

block of aluminium

Block of aluminum investigating the densities of objects. She is going to use the table below to record her results.

A block of Aluminum is a block added by Tinkers' Construct. Block of Aluminum is primarily used as a storage block for Aluminum Ingots but may also be used as decoration.

Aluminum is used in a huge variety of products including cans, foils, kitchen utensils, window frames, beer kegs, and airplane parts. This is because of its particular properties.

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Answer:

a moving object will keep moving if not stopped

the sun being at the center of the solar system

Explanation:

Galileo is known for being the first person make a telescope, there fore being the first person to see that the sun is in the center of the solar system. he also came up with the theory that if something is pushed, it would keep moving until stopped by another force. For example, say you drop your pencil, it keeps falling until it hits the ground. That is exactly what Galileo did in his  Leaning Tower of Pisa experiment and found that theory to be true.

Galileo’s discoveries were later used in Newton’s laws include the following

below:

Galileo was a scientist which invented the telescope and used it to view the

center position of the Sun in the solar system.

He also proposed  that if something is pushed, it would keep moving until

stopped by another opposing force. His discoveries were found to be true

and were later used in  Newton’s laws.

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Answer:

m = 3.57

Explanation:

Given that,

Sergei uses a lever to lift a heavy rock. He obtains a 2.5m lever and places the fulcrum 0.7m from the rock.

We need to find the ideal mechanical advantage of Sergei's lever.

It is equal to the ratio of resistance arm to the effort arm. In terms of length it is given by :

[tex]m=\dfrac{d_2}{d_1}\\\\m=\dfrac{2.5}{0.7}\\\\=3.57[/tex]

So, the ideal mechanical advantage of the lever is 3.57.

Answer:

e

Explanation:

It will take 74.07 minutes, for a transformer to transfer 2.3 X 10^6 J of energy from a 120-V circuit to a 345-V circuit with a current of 1.5 A

The rate of doing work is known as power. The Si unit of power is the watt.

Power =work/time

The mathematical expression for the power is as follows

P = VI

where P is the power

V is the voltage

I is current passing through the circuit

For a transformer to transfer 2.3 X 10^6 J of energy from a 120-V circuit to a 345-V circuit with a current of 1.5 A

Power on the delivery side of the transformer by using the above formula

P = VI

P= 345 V × 1.5 A

P= 517.5 watt

Power = electrical energy /time

517.5 watt = 2.3 X 10^6 J / time

time = 4444.44 seconds

       =74.07 minutes

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we can't see multicellular animal with our naked eyes

Answer:

Answer is -2.

Explanation:

I hope it's helpful!

Answer:

neg 2

Explanation:

Answer:

Both are attractive as well as repulsive.

Explanation:

(Like poles repel, like charges repel; unlike poles attract, unlike charges attract).

There are two types of charges that form electric fields: positive and negative charges. Magnetic fields are formed by charges and are related with two magnetic poles, north and south (but moving charges).

The attraction and repulsion of electric charges produce both electric and magnetic fields.

The force released by magnets when they attract or repel each other is known as magnetism. An electric force is the attracting or repulsive interaction between any two charged things.

Similarities are as follows:

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Answer:

1.C70

2.Fullerene

3.Lonsdaleite

4.Graphite

5.Diamond

6.Amorphous carbon

I hope this helps. thank you

Explanation:

The compound of an element is arranged in a manner in more than one different form.

The example of an allotrope is as follows:-

The allotropes which are shown in the image is as follows:-

Hence, these are the allotropes.

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Answer:

28 miles

Explanation:

3,223 meters/day x 14 days = 45,122 meters

1 meter = 3.28 feet

45,122 meters = 148,000 feet

5280 feet = 1 mile

148,000 feet = 28 miles

Answer:

La magnitud de la fuerza de atracción entre las cargas es 0.648 newtons.

Explanation:

La fuerza eléctrica de atracción entre dos partículas cargadas eléctricamente es determinada por la ley de Coulomb, la cual dice que la fuerza eléctrica es directamente proporcional a la carga eléctrica e inversamente proporcional de la distancia entre las partículas. Matemáticamente hablando, la formula es descrita a continuación:

[tex]F = \kappa\cdot \frac{q_{A}\cdot q_{B}}{r^{2}}[/tex] (1)

Donde:

[tex]F[/tex] - Fuerza electrostática, medida en newtons.

[tex]\kappa[/tex] - Constante electrostática, medida en newton-metros cuadrados por Coulomb cuadrado.

[tex]q_{A}[/tex], [tex]q_{B}[/tex] - Cargas eléctricas, medidas en Coulomb.

[tex]r[/tex] - Distancia entre partículas, medidas en metros.

Si sabemos que [tex]\kappa = 9\times 10^{9}\,\frac{N\cdot m^{2}}{C^{2}}[/tex], [tex]q_{A} = 6\times 10^{-6}\,C[/tex], [tex]q_{B} = 3\times 10^{-6}\,C[/tex] y [tex]r = 0.5\,m[/tex], entonces la magnitud de la fuerza de atracción entre las cargas es:

[tex]F = \left(9\times 10^{9}\,\frac{N\cdot m^{2}}{C^{2}} \right)\cdot \frac{(6\times 10^{-6}\,C)\cdot (3\times 10^{-6}\,C)}{(0.5\,m)^{2}}[/tex]

[tex]F = 0.648\,N[/tex]

La magnitud de la fuerza de atracción entre las cargas es 0.648 newtons.

Answer:

b

Explanation:

B is the answer because Selective breeding is taking two organisms and crossing them.

Answer:

Voltage, Zero

Explanation:

If an electric circuit has 0 A of current running through it, then the ✔ voltage must be ✔ zero.

Answer:

Voltage, zero

Explanation:

Answer:

people separate mixtures in order to ger a specific substance that they need. 2. the other thing people separate mixtures to remove the unrequired components. 3.To get a pure substance

Explanation:

hope this helps probably don't because you asked this a week ago but have a good day :) ❤

Answer:

Its B for your question

Explanation:

its B hope it helps

awnser:

C

Explanation:

An object accelerates in the same direction as that of force applied

Answer:

B

Explanation:

Gravity, the attractive force between all masses, is what keeps the planets in orbit. Newton’s universal law of gravitation relates the gravitational force to mass and distance

The force of gravity is what gives us our sense of weight. Unlike mass, which is constant, weight can vary depending on the force of gravity (or acceleration) you feel. When Kepler’s laws are reexamined in the light of Newton’s gravitational law, it becomes clear that the masses of both objects are important for the third law, which becomes a3 = (M1+ M2) × P2. Mutual gravitational effects permit us to calculate the masses of astronomical objects, from comets to galaxies.

Answer:

The property of the wave marked X is related to the source of the wave

Explanation:

The source of of origin of waves

Electromagnetic wave are waves that consists of varying electric and magnetic field that vibrate perpendicular to each other and to the direction of propagation of the wave and they are therefore transverse waves and transfer energy

Electromagnetic waves originate from the vibration of charged particles that gives off varying electric and magnetic fields

Mechanical waves are defined as waves that require a material medium such as air, water, metal, plastic, stretched leather, or wood to propagate

Mechanical waves originate from vibration of the particles of a medium

Sound waves which is a form of longitudinal mechanical waves that propagates by the vibration of the particles of a given medium about a point parallel to the direction of propagation of the wave.

Answer:

K = 960 J

Explanation:

Given that,

Mass of a child = 20 kg

Mass of a sled = 10 kg

Speed of child on sled = 8 m/s

We need to find the kinetic energy of the sled with the child.

The total mass of child and the sled = 20 kg + 10 kg

= 30 kg

The formula for the kinetic energy of an object is given by :

[tex]K=\dfrac{1}{2}mv^2\\\\K=\dfrac{1}{2}\times 30\times (8)^2\\\\K=960\ J[/tex]

Hence, the kinetic energy of the sled with the child is 960 J.

Answer:

The description of the energy of the skier at point W is,

At point W, potential energy is greatest and kinetic energy is least

Explanation:

The given parameters are;

The highest point of the skier's path = Point W

The lowest point of the skier's path = Point X

The height of the peak after point X = Intermediate between point W and point X

The potential energy of the skier, P.E. = m·g·h

The kinetic energy of the skier, K.E. = 1/2·m·v²

The total mechanical energy of the skier, M.E. = P.E. + K.E.= Constant

Where;

m = The mass of the skier

g = The acceleration due to gravity = 9.8 m/s²

h = The height of the skier

v = The velocity of the skier

Therefore, the P.E. of the skier is highest at the highest point of the skier's path which is the point W, where h = Maximum

Similarly, the potential energy of the skier will be lowest at point X which is the lowest point on the skier's path

From P.E. + K.E. = constant, the kinetic energy will be least at point W, where the potential energy is highest.

Therefore, the description of the energy of the skier at point W is that the potential energy is greatest and kinetic energy is least.

Answer:

F = 19600 N

Explanation:

After reading this interesting exercise, I think you are missing the diagram, but we are going to solve them assuming the height of the hill, point A of about h = 100m.

Let's start by using the concepts of energy, to find the speed at the bottom of the hill

Starting point. Point A highest part of the colima

         Em₀ = U = m g h

Final point. Flat part.

         [tex]Em_{f}[/tex] = k = ½ m v²

as they tell us that there is no friction, energy is conserved

        Em₀ = Em_{f}

        mgh = ½ m v²

        v = √2gh

let's calculate

        v = √ (2 9.8 100)

         v = 44.27 m / s

Now we can use the scientific expressions, when it stops its speed is zero

         v² = v₀² - 2 a x

          0 = v₀² - 2ax

          a = [tex]\frac{ v_{o}^2 }{2x}[/tex]

          a = [tex]\frac{ 44.27^{2} }{ 2 \ 50}[/tex]

          a = 19.6 m / s²

with this acceleration we use Newton's second law

           f = m a

           F = 1000 19.6

           F = 19600 N

Answer:7.5j

Explanation:

P=w/s

Answer:

1kg/ L

Explanation:

Answer:

b

Explanation: