P2O5 is a covalent compound used to purify sugar. How many atoms of phosphorus does this compound have? How many atoms of oxygen does this compound have?

[tex] \bf \underline{Given :-}[/tex]

[tex] \sf{• \: An  \: electric \:  heater \:  draws  \: a  \: current  \: of  \: 5  \: ampere \:  from \:  220  \: volt \:  supply.}[/tex]

[tex] \\ [/tex]

[tex]\bf{ \underline{To \:  Find:- }}[/tex]

[tex] \sf• \: ( a)  \: lts  \: resistance.[/tex]

[tex] \sf• \: (b) \:  electrical  \: energy  \: consumed  \: in \:  kwh \:  if  \: it  \: is  \: used  \: for \:  4  \: hours.[/tex]

[tex] \\ [/tex]

[tex]\huge\bf{ \underline{ Solution :-}}[/tex]

[tex] { \boxed{\bf{(a)}}}[/tex]

[tex] \sf•  \: Current  \: (I) = 5 \: A[/tex]

[tex] \sf• \: Voltage \: (V) = 220 \: v[/tex]

[tex] \bf \red{\bigstar{\: Formula \:  of \:  Resistance \: (R) =  \frac{V}{I} }}[/tex]

[tex] \sf \rightarrow  R = \frac{220}{5} [/tex]

[tex] \sf \rightarrow R =44[/tex]

[tex] \bf{Hence,  \: it's  \: resistance \:  is  \:  \: 44 \:  Ω \: .}[/tex]

[tex] \\  \\ [/tex]

[tex] { \boxed{\bf{(b)}}}[/tex]

[tex] \sf•  \: Current  \: (I) = 5 \: A[/tex]

[tex] \sf• \: Voltage \: (V) = 220 \: v[/tex]

[tex] \bf \red{\bigstar{\: Formula  \: of \:  Electric  \: Power \:  (P) = IV  }}[/tex]

[tex] \sf \rightarrow P = (5  \times 220) [/tex]

[tex] \sf \rightarrow P = 1100 \:[/tex]

[tex] \\ [/tex]

[tex] \sf \therefore \: P = 1100 \: watt[/tex]

[tex] \sf{• \: Time  \: (t) = 4  \: hours }[/tex]

[tex] \bf \red{\bigstar{ \: Formula  \: of  \: Energy  \: (W) = Pt}}[/tex]

[tex] \sf \rightarrow W= 1100  \times  4[/tex]

[tex] \sf \rightarrow W = 4400[/tex]

[tex] \sf \rightarrow W  =  \frac{4400}{1000} [/tex]

[tex] \sf \rightarrow W  =  4.4[/tex]

[tex] \sf \therefore W  =  4.4 \: kwh[/tex]

[tex] \bf{Hence,  \: Electrical  \: Energy \:  is \:  4.4  \: kwh.}[/tex]

Answer is 4.4 kwh.

hope it helps you.

Answer:

I found  

33 ∘ C

Explanation:

i hope this helps :)

battery

Explanation:

Electromagnets can be created by wrapping a wire around an iron nail and running current through the wire. The electric field in the wire coil creates a magnetic field around the nail. In some cases, the nail will remain magnetised even when removed from within the wire coil

Answer:

Light Bulb

Explanation:

I did the quiz and i got it right

Answer:

A. Crust

B. Mantle

C. Outer Core

D. Inner Core

Explanation:

Answer:

A. Crust

B. mantle

C. outer core

D. inner core

Explanation:

because it is

Answer:

If you break a rib in the middle of your rib cage, the sharp end of bone could puncture a lung. If you break a rib toward the bottom of your rib cage, the sharp end of the bone could cause damage to your liver, kidney, or spleen.

Explanation:

Hope this helped..

Answer:

really fast? xP

Explanation:

Answer:

sun is the main source while the other object reflect light on the sun

Explanation:

nasa libro yans

Answer:

1. Endurance activities

Only aerobic source

2. Can contract repeatedly

Speed strength and power.

Both aerobic and anaerobic sources

3. Fast contraction speed

Only anaerobic sources

Produce most force

Fatigue quickly

Speed, strength and power

Explanation:

I hope this helps. Although, I'm about 80% sure of the answer.

Answer:

It is not still true that the average velocity of the particle is equal to half the sum of the initial and final velocities when the acceleration of the particle is not constant

Explanation:

The motion of a particle under constant acceleration, 'a', is be given by the following kinematic equations;

v² = u² + 2·a·s

v = u + a·t

Where;

v = The final velocity of the particle

u = The initial velocity of the particle

a = The acceleration of the particle

s = The distance through which the particle travels

t = The time of motion of the particle

By simplifying the above equation, we have;

v² - u² = 2·a·s

(v² - u²)/(2·a) = s

(v - u) × (v + u)/(2 × a) = s

((v - u)/a) × ((v + u)/2) = s

From v = u + a·t, we have;

t = (v - u)/a

∴ ((v - u)/a) × ((v + u)/2) = t × ((v + u)/2) = s

∴ ((v + u)/2) = s/t

The average velocity = (Total distance traveled by the particle) ÷ (The time of travel of the particle)

∴ The average velocity = s/t = ((v + u)/2) = Half the sum of the initial and final velocity

However, it is not still true that the average velocity of the particle is equal to half the sum of the initial and final velocities when the acceleration of the particle, 'a', is not constant, as the velocity time graph is no longer a straight line graph and the distance traveled by the particle, 's', which is the area under the velocity time graph, 'A', (given by the sum of area of the triangle and the rectangle given by the area under straight line graph for constant velocity) cannot be given directly by the product of the time and the average velocity.

Answer:

0.3 hour

Explanation:

From the question given above, the following data were obtained:

Distance travelled = 90 km

Speed of 1st car = 50 km/h

Speed of 2nd car = 60 km/h

Time interval separating the two cars =?

Next, we shall determine the time taken for each car to get to the destination. This can be obtained as follow:

For the 1st car:

Distance travelled (d) = 90 km

Speed of 1st car (S₁) = 50 km/h

Time (t₁) =?

Speed = Distance /time

S₁ = d/t₁

50 = 90 / t₁

Cross multiply

50 × t₁ = 90

Divide both side by 50

t₁ = 90 / 50

t₁ = 1.8 hours

For the 2nd car:

Distance travelled (d) = 90 km

Speed of 2nd car (S₂) = 60 km/h

Time (t₂) =?

Speed = Distance /time

S₂ = d/t₂

60 = 90 / t₂

Cross multiply

60 × t₂ = 90

Divide both side by 60

t₂ = 90 / 60

t₂ = 1.5 hours

Finally, we shall determine the time interval separating the arrival of the two cars. This can be obtained as follow:

Time for the 1st car (t₁) = 1.8 hours

Time for the 2nd (t₂) = 1.5 hours

Time interval separating the two cars (tₛ) =?

tₛ = t₁ – t₂

tₛ = 1.8 – 1.5

tₛ = 0.3 h

Thus, the interval separating the arrival of the two cars is 0.3 hour

Answer:

If the body is in equilibrium the two forces add up and the third is the opposite of the resultant.

F(1x)=F(1)=10 N

F(2x)=F(2)cos60=5•0.5=2.5 N

F(2y) =F(2)sin60 = 5•0.866= 4.33 N

F(3x) =- F(x)=- (10+2.5 )= -12.5 N

F(3y) =- F(2y)= - 4.33 N

F(3) = sqrt{ F(3x)²+F(3y)²} =13.23 N

tan φ = F(3y)/F(3x) =4.33/12.5=0.364

φ = 19.1⁰ (south-west)

Explanation:

Explanation:

The reason time zones are 15 degrees wide is because there are 24 hours and 360/24 = 15. As you move east by 15 degrees the sun’s position in the sky changes relative to us and it looks an hour later in the day, so we advance our clocks to match the sun’s position.

So every 15° eastward one hour ahead.

Answer:Aplitude

Explanation:

a p e x

Answer:

Explanation:

Plug

Answer:

It ran at an average of 2 meters per second.

Explanation:

Answer:

Plantae. Also called the Kingdom Metaphyta, the Kingdom Plantae consists of all multicellular, eukaryotic, and photosynthetic organisms on the planet. Being photosynthetic, these organisms are autotrophs and can make their food using the energy from the sun.

Answer:

 V = 2.52 10³ V

Explanation:

The electric potential for a point charge is

       V = k ∑ [tex]\frac{q_i}{r_i}[/tex]

In this case the formula is

       V = k ([tex]\frac{q_1}{r_1} + \frac{q_2}{r_2}[/tex])

distances are the absolute value

       r₁ =√ (7.1 -0)² = 7.1 m

       r₁ =√ (7.1 - 14.3)² = 7.2 m

we substitute

       V = 9 10⁹ (q₁ / 7.1 + q₂ / 7.2)

we have two possibilities

* different charges

         V = 9 10⁹ (q₁ / 7.1 + q₂ / 7.2)

* equal charges and same sign

          q₁ = q₂ = q

         V = 9 10⁹ q (1 / 7.1 + 1 / 7.2) = p 9 10⁹   0.2797

         V = 2.52 10⁹ q

if we assume a value of the charge, for example q = 1 10⁻⁶ c

           V = 2.52 10⁹ 1 10⁻⁶

            V = 2.52 10³ V

Answer:

Electromagnetic

Explanation:

Electromagnetic waves are those waves that do not require any material medium for propagation. They arise from a vibration of electric and magnetic fields.

The electromagnetic spectrum is comprised of many waves. One of the waves in the spectrum is visible light.

Visible light is in turn composed of seven different wavelengths of which green light is one of them. Hence, green light travels by electromagetic wave.

Answer:

Final temperature, T2 = 314.9 Kelvin

Explanation:

Given the following data:

Mass = 0.9kg

Initial temperature, T1 = 10°C to Kelvin = 10 + 273 = 283K

Quantity of heat = 120,000 J

Specific heat capacity = 4182 j/kgK

To find the final temperature;

Heat capacity is given by the formula;

[tex] Q = mcdt[/tex]

Where;

Q represents the heat capacity or quantity of heat.

m represents the mass of an object.

c represents the specific heat capacity of water.

dt represents the change in temperature.

Making dt the subject of formula, we have;

[tex] dt = \frac {Q}{mc} [/tex]

Substituting into the equation, we have;

[tex] dt = \frac {120000}{0.9*4182} [/tex]

[tex] dt = \frac {120000}{3763.8} [/tex]

dt = 31.9K

Now, the final temperature T2 is;

But, dt = T2 - T1

T2 = dt + T1

T2 = 31.9 + 283

T2 = 314.9 Kelvin

Answer:

wavelength

Explanation:

Electromagnetic waves is a propagating medium used in all communications device to transmit data (messages) from the device of the sender to the device of the receiver.

Generally, the most commonly used electromagnetic wave technology in telecommunications is radio waves.

Radio waves can be defined as an electromagnetic wave that has its frequency ranging from 30 GHz to 300 GHz and its wavelength between 1mm and 3000m. Therefore, radio waves are a series of repetitive valleys and peaks that are typically characterized of having the longest wavelength in the electromagnetic spectrum.

Basically, as a result of radio waves having long wavelengths, they are mainly used in long-distance communications such as the carriage and transmission of data.

The distance from one peak to the next peak is called wavelength. This distance is also equal to the distance from one trough of a wave to another.

Mathematically, wavelength is calculated using this formula;

[tex] Wavelength = \frac {speed}{frequency} [/tex]

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An object at rest stays at rest and an object in motion stays in motion at a constant speed and direction unless acted upon by an unbalanced force. ... In the absence of any forces, no force is required to keep an object moving.

In everyday situations, it does seem that a force is needed to keep an object moving at a constant speed in a straight line because the resistive frictional force acted on every objects against their motion.

The resistance provided by surfaces in touch as they move past one another is known as friction.

According to Newton's first law of motion, Unless forced to change its condition by an outside force, every object will continue to be at rest or moving uniformly in a straight line.

But in  everyday situations, it does seem that a force is needed to keep an object, for example the shopping trolley, moving at a constant speed in a straight line because of the frictional resistive force acting opposite to the motion. That's why, a force of equal magnitude and opposite direction must be applied on the object, so that, resultant force becomes zero. It can at a constant speed in a straight line.

Learn more about friction here:

https://brainly.com/question/13000653

#SPJ2

Answer:

The resultant force is the single force that would produce the same effect on an object as two or more forces that are applied to the object. To find the resultant force, first draw a free body diagram, which is a diagram that shows all the applied forces using arrows in the direction of each force.

Kinetic Energy. Energy is transferred from one object to another when a reaction takes place. Energy comes in many forms and can be transferred from one object to another as heat, light, or motion, to name a few. For the blue ball to move to the position of the green ball, energy must be given to the blue ball.

Answer:

Carbon monoxide

Explanation:

Carbon refers to the "C" which stands for carbon. Monoxide refers to the single molecule of oxygen present in the substance.

Answer:

Carbon monoxide is the answer here

Explanation:

Answer:

Both have the same amount. C.

Explanation:

Answer:

the device that transfer thermal energy into to mechanical energy is heat engine.

hope it helps.

Explanation:

heat engine transforms thermal energy to mechanical energy

hope it is helpful to you

Answer:

2 or more atoms

Explanation:

yes yes yes yes yes yes yes yes

Answer:

Two or more

Explanation:

It's mostly two but unique structures might compose of more than 2