five 8 watts and three 100 watt/lamps are run for 8 hrs. if the cost of energy is 5 naira per unit. calculate the cost of running the lamps​

Both springs have a total compression of 2x = 1.5 m.

The force acting on the block is equal to the sum of the forces from both springs. Let x be the compression of each spring.

The force from each spring is given by Hooke's law: F = kx, where k is the spring constant. Since there are two springs, the total force is:

F = 2kx

The force on the block is 600 N, so set up the equation:

2kx = 600

Substituting k = 400 N/m:

2(400 N/m)x = 600 N

Solving for x:

x = 0.75 m

Therefore, the total compression of both springs is 2x = 1.5 m.

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If a car hits a 14-year-old boy, the best way to open his airway is to use the jaw-thrust maneuver.

Opening a person's airway after they have been injured in an accident is crucial first aid, especially if there is a potential that they may have sustained head or neck injuries. Here, the jaw-thrust manoeuvre would be the most effective technique to access the airway. It is necessary to kneel near the injured individual and approach them from behind their back.

One can clear the airway by using the jaw-thrust manoeuvre without running the danger of further neck or spine damage. It's crucial to keep an eye on someone's breathing and to be ready to give them rescue breathing if necessary. The recommended course of action is to wait for medical personnel to provide advanced airway care if the patient is unconscious, not breathing, or has a suspected spinal injury.

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Kepler's laws demonstrate how gravity affects orbits. They pertain to any orbiting object, such as planets around the Sun and moons.

Our planet is subject to incredibly significant impacts from the sun: By photosynthesis, it supports seasons, climate, ocean currents, weather, and plant life. Life on Earth just wouldn't live without the heat and light provided by the sun. The solar system's centre is where the sun is located. The sun is a sizable ball of hot gases that spins and glows.

A liquid will expand in order to fill a closed container while inside of it. The air you inhale is an example of a gas. When applied to matter, the word "gas" can also refer to the state.

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The magnitude of the net gravitational force Fgrav on the mass at the origin due to the other two masses is 4.62 × 10⁻⁵  N, rounded to three significant figures.

To find the magnitude of the net gravitational force Fgrav on the mass at the origin due to the other two masses, we need to use Newton's law of gravitation. According to this law, the gravitational force F between two masses m₁ and m₂ separated by a distance r is given by:

F = G * m₁ * m₂ / r²

where G is the gravitational constant.

In this case, we have three masses with the same mass m = 4600 kg each, so we can write the gravitational force on the mass at the origin as the sum of the gravitational forces due to the other two masses:

Fgrav = F₁ + F₂

where F₁ is the gravitational force due to the mass at x₁ = -140 cm and F₂ is the gravitational force due to the mass at x₂ = 370 cm.

To calculate these forces, we first need to find the distances between the masses and the mass at the origin. Let's call the distance between the mass at x₁ and the mass at the origin d₁, and the distance between the mass at x₂ and the mass at the origin d₂. We have:

d₁ = 140 cm = 1.4 m
d₂ = 370 cm = 3.7 m

Now we can calculate the gravitational forces using the formula above:

F₁ = G * m² / d₁²
F₂ = G * m² / d₂²

Plugging in the values, we get:

F₁ = 3.53 × 10⁻⁵ N
F₂ = 1.09 × 10⁻⁵ N

Finally, we can find the net gravitational force on the mass at the origin by adding these two forces:

Fgrav = F₁ + F₂ = 4.62 × 10⁻⁵ N

Therefore, the magnitude of the net gravitational force Fgrav on the mass at the origin due to the other two masses is 4.62 × 10⁻⁵  N, rounded to three significant figures.

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Answer:

Im not really sure lemme ask my friend he knows about this subject and when he gives me answer ill edit this

Explanation:

Answer:

i dont even know

Explanation:

I just dont know

Temperature is increased the pressure also increases due to fast movement of molecules because of more energy.

The temperature of the gas is directly proportional to the pressure. Faster moving particles will collide with the walls of the container that put force on the wall which leads to increase in pressure.

So we can conclude that temperature is increased the pressure also increases due to fast movement of molecules because of more energy.

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Answer: V = M1 U/ (M1 + M2)

Explanation: According to the question as the second mass is in rest therefore, the velocity of the second mass would be 0.

The law of conservation of momentum states that in an isolated system the momentum of two bodies before and after collision remain the same unless and until an external force is made to act upon it.

In this case as well when the bodies collide the momentum before and after the collision is going to remain the same.

Therefor,

M1 x U + M2 x 0 = (M1 + M2) x V

=> V = M1 x U/ (M1 + M2)

Hence the correct expression which represent V is M1 x U/ (M1 + M2).

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The drag force is the force that opposes the movement of a body through a fluid.

The drag force is the force that opposes the movement of a body through a fluid. This occurs in cases such as when a car is moving through air.

Owing to the fact that drag force tends to slow down vehicles when they move at higher speed, vehicles that are meant for racing are streamlined to reduce the drag force.

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Answer:

2 moles

Explanation:

please mark me as brainlest

The mass of one mole of iron sulphide is 88 g. Then the number of moles in 44 g is 0.5 moles.

One mole of a substance is its amount which contains 6.022 × 10²³ atoms. This number is called Avogadro number. One mole of every element contains Avogadro number of atoms.

Similarly one mole of every compound contains Avogadro number of molecules. The mass of one mole of a compound is called its molar mass.

Atomic mass of  Fe = 56 g/mol

atomic mass o S = 32 g/mol

molar  mass of FeS = 56 + 32 = 88 g/mol

Mass of one mole of iron sulphide (FeS) is 88 g. Hence number of moles in 44 g is :

no.of moles = given weight/molar mass

                    = 44 g /88 g/mol = 0.5 mol

Therefore, the number of moles of FeS in 44 g is 0.5.

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G2-type stars take the longest time, while O9-type stars take a shorter time to go from a protostar to a main-sequence star during the formation process.

Based on the spectral types provided, the order of the stars from the longest to the shortest time taken to go from a protostar to a main-sequence star during the formation process is as follows:
1. G2
2. O9
- Stars with lower masses, like G2-type stars, take longer to form because they have a lower rate of fusion and lower pressure at their cores.
- On the other hand, O9-type stars have a higher mass, which results in a higher rate of fusion and higher pressure at their cores.

This means they will form faster than G2-type stars.

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Answer:

hope it helps...

Explanation:

The answer is true

The time constant (in ms) of the RC circuit is 3.75 ms. Hence, the correct option is  (d) 3.75 ms.

The rate of decay of the current in a charging capacitor is proportional to the current in the circuit at that time. Therefore, it takes longer for a larger current to decay than for a smaller current to decay in a charging capacitor.A capacitor is discharged through a 20.0 Ω resistor.

The discharge current decreases to 22.0% of its initial value in 1.50 ms. We can obtain the time constant of the RC circuit using the following formula:$$I=I_{o} e^{-t / \tau}$$Where, I = instantaneous current Io = initial current t = time constant R = resistance of the circuit C = capacitance of the circuit

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The time constant of the RC circuit is approximately 0.674 m s.

To determine the time constant (τ) of an RC circuit, we can use the formula:

τ = RC

Given that the discharge current decreases to 22.0% of its initial value in 1.50 m s, we can calculate the time constant as follows:

The percentage of the initial current remaining after time t is given by the equation:

I(t) =\(I_oe^{(-t/\tau)\)

Where:

I(t) = current at time t

I₀ = initial current

e = Euler's number (approximately 2.71828)

t = time

τ = time constant

We are given that the discharge current decreases to 22.0% of its initial value. Therefore, we can set up the following equation:

0.22 =\(e^{(-1.50/\tau)\)

To solve for τ, we can take the natural logarithm (ln) of both sides:

ln(0.22) = \(\frac{-1.50}{\tau}\)

Rearranging the equation to solve for τ:

τ = \(\frac{-1.50 }{ ln(0.22)}\)

Calculating this expression:

τ ≈ 0.674 m s

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Answer:

B

Explanation:

kinetic energy is the energy an object has due to its motion

Given:

Height = 0.8 m

Initial velocity = 7.6 m/s

Given that the ball goes straight up, let's solve for the following.

(a) What will be the ball's velocity when it gets back to its original height.

Since the ball has an initial velocity of 7.6 m/s, the ball's velocity when it gets back to its original height will be the opposite of the initial velocity.

Here, the final velocity will be the same as the initial velocity but in the downward direction.

Therefore, the ball's velocity when it gets back to its original height will be -7.6 m/s

(b) How long will it take the volleyball to get to the top of its path.

To find how long it will take the volleyball to get to the top of its path, apply the formula:

Where:

vf is the final velocity at its maximum height = 0 m/s

vi is the initial velocity = 7.6 m/s

a is acceleration due to gravity = -9.8 m/s^2

d is the displacement

Let's solve for the displacement.

We have:

Now, to find the time it will take, apply the formula:

Where t is the time.

We have:

ANSWER:

(a) -7.6 m/s

(b) 0.78 s

Answer:

3 meters

Explanation:

\(W=Fd \\\\450J=150N \cdot d \\\\d=3m\)

Hope this helps!

Answer:

3 meters

Explanation:

Formula I know is

work= force x distance.

Assuming an average energy transfer efficiency of 10%, we would expect the lizard to have approximately 1,000 J of energy if the primary producers had 10,000 J of energy.

As per the 10% law of energy transfer, we can expect the lizard to have around 1,000j of energy. This is because only 10% of the energy is transferred from one trophic level to the next, meaning that the energy available to the next consumer is only a fraction of what the previous level had.

Therefore, if the primary producers had 10,000j of energy, the energy available to the lizard would be roughly 1,000j.

The energy available to the lizard would depend on the efficiency of energy transfer and the trophic level it occupies within the food chain. In ecological systems, energy is typically transferred between trophic levels with a loss of energy at each step due to metabolic inefficiencies and heat dissipation.

On average, the efficiency of energy transfer from primary producers to herbivores (such as lizards) is estimated to be around 10%. This means that only 10% of the energy available at the producer level is effectively passed on to the next trophic level. Therefore, if the primary producers have 10,000 joules (J) of energy, we would expect the lizard to have approximately 1,000 J of energy.

It's important to note that this is a general estimation, and actual energy transfer efficiencies can vary depending on the specific ecosystem and the dynamics of the food web. Factors such as the species of primary producers and the specific feeding habits of the lizard can also influence the energy transfer efficiency.

Nonetheless, the 10% rule provides a useful approximation for understanding energy flow through trophic levels in ecological systems.

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If the electronic configuration of an atom is 1s2 2s2 2p2 then it has 6 electrons.

This electronic configuration corresponds to carbon, whose atomic number is 6.

The electronic configuration is a form of organization by layers that the electrons have.

Its importance is based on the ability to determine through it the total properties of chemical combination of atoms, which is equivalent to their location on the periodic table of elements.

Furthermore, the electronic configuration of an element defines its binding energy and thus its state at room temperature.

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Answer: The galaxy's bulge

Explanation:

By using first and third equation of motion, the number of revolutions the tire makes during this motion is 43 rev.

ANGULAR MOTION

Since the car accelerate from rest, initial velocity will be zero.

Given that a car accelerates uniformly from rest and reaches a speed of 24.3 m/s in 9.1 s. The following are the given parameters

If the diameter of a tire is 80.2 cm, to find the number of revolutions the tire makes during this motion, we must first calculate the distance travelled by the car by using first and third equation of motion of the car.

First equation

V = U + at

Substitute all necessary parameters into the equation.

24.3 = 0 + 9.1a

a = 24.3/9.1

a = 2.67 m/\(s^{2}\)

Third Equation of motion

\(V^{2} = U^{2} + 2aS\)

Substitute all the necessary parameters

\(24.3^{2}\) = 0 + 2 x 2.67 x S

590.49 = 5.34S

S = 590.49 / 5.34

S = 110.58 m.

Given that the diameter of a tire is 80.2 cm,

the radius (r) will be 80.2/2 = 40.1 cm

convert it to meter

r = 40.1/100 = 0.401 m

The Circumference of the tire = 2\(\pi\)r

Circumference = 2 x 3.143 x 0.401

Circumference = 2.52 m

Assuming no slipping, number of revolutions = 110.58/2.52

Number of revolutions = 43.89 rev.

Number of revolutions = 43 rev.

Therefore, the number of revolutions the tire makes during this motion is 43 rev.

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Explanation:

The magnitude of the total momentum of the two balls after the collision is Zero.

Expecting the collision is elastic, the total momentum is conserved, so the total momentum of the two balls after the collision will be equivalent to the total momentum before the collision.

As a result, all that is required is to determine the total momentum prior to the collision. We have, assuming that north is a positive direction:

the momentum of the ball 1: p₁ = mv = 2 kg × 4 m/s = 8 kg m/s

The momentum of ball 2: p₂ = mv = 1 kg × -8 m/s = -8 kg m/s

total momentum = p₁ + p₂ = 8 kg m/s + (-8 kg m/s) = 0

So, consequently, the total momentum will be zero following the collision.

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Answer:

6,001′ 0″

Explanation:

Incised by the Colorado River, the canyon is immense, averaging 4,000 feet deep for its entire 277 miles. It is 6,000 feet deep at its deepest point and 18 miles at its widest. However, the significance of Grand Canyon is not limited to its geology.

Answer: Brown syrup

Explanation:

Answer:

syrup

Explanation:

Answer:

Explanation:

F = m * a

The apple's acceleration is not influenced by the acceleration due to gravity for this question.  In real life it most certainly is influenced by gravity.

F = m * a

F = 10 Newtons.

a = 6 m/s^2

m = 10/6 = 1.66 kg. Mighty  large apple