Why is electricity created at peak times not as efficient?

Answer:

1. Can change the state of an object(rest to motion/ motion to rest)

2. May change the speed of an object if it is already moving.

3. May change the direction of motion of an object.

Explanation: A force acting on an object causes the object to change its shape or size, to start moving, to stop moving, to accelerate or decelerate.

Explanation:

Ventilation

Answer:

F = 48 [N]

Explanation:

To solve this problem we must use Newton's third law, which tells us that the sum of forces on a body must be equal to zero, that is, the body is in static equilibrium or in equilibrium.

ΣF = 0

24 + 24 - F = 0

F = 24 + 24

F = 48 [N]

Note: Jeff's force should be equal to the sum of Sally and Misha's forces, but in the opposite direction.

Answer:

diabetes

Explanation:

hope it helps

Answer:diabetes

Explanation:

common sense

Answer:

Judging from the number of stars large enough to produce such black holes, however, scientists estimate that there are as many as ten million to a billion such black holes in the Milky Way alone.

Explanation:

Answer:

82.2

Explanation:

The property of air which makes it effective in protecting firefighters is that it is a poor thermal conductor.

We define air as a mixture of gasses. We know that there a re several gases that are known to compose air and among these are oxygen, carbon dioxide, noble gasses and nitrogen.

We know that air is a poor conductor of heat. As such, air does not heat up quite easily and this would help to protect the fireman from getting burnt since air does not easily allow heat to pass through it as it were, this is why the firefighters depend on the insulative property of air.

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Answer:

It is because the load is in between fulcrum and effort making a longer effort arm than the load arm resulting to multiplication of force and a mechanical advantage of greater than 1.

Explanation:

The distance from the fulcrum to the effort is the effort arm where as the distance from the fulcrum to the load is the load arm.

The first class lever has a mechanical advantage that varies per the position of the load with respect to effort position from the fulcrum. They have the fulcrum at the middle. For example, a beam balance and a pliers. The formula to remember is FLE for easy categorization of the lever classes.

The second class lever , the load is at the middle.For example a wheel barrow and a bottle opener. In this class, the effort arm is longer than the load arm.The effort is force multiplication making the mechanical advantage to be greater than 1.

The third class of lever has effort in the middle.For example a spade or a knife.In this class effort arm is shorter than the load arm, causing change in direction of force. The effect is a mechanical advantage less than 1.

Answer:

10

Explanation:

Acceleration = Force / Mass

500 N / 50 Kg =  10

Time = (distance) / (speed)

Time = (26 meters) / (8 meters/hour)

Time = 3.25 hours or 3 hours 15 minutes

Answer:

The acceleration of the object is 0 m/s^2.

Explanation:

To solve this problem, we must remember that acceleration is equal to the change in velocity per unit time.  Since we are given that the velocity is constant, this means it is unchanging, and the acceleration is therefore zero.

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Answer:

The distance separating the two particles when the moving particle is momentarily stopped is 0.947 m

Explanation:

Given that,

First charge = 40 μC

Second charge = 80 μC

Distance between the two particles = 2.0 m

Kinetic energy = 16 J

We need to calculate the distance separating the two particles when the moving particle is momentarily stopped

Using conservation of energy

[tex]K.E+\dfrac{kq_{1}q_{2}}{d}=\dfrac{kq_{1}q_{2}}{x}+K.E[/tex]

Put the value into the formula

[tex]16+\dfrac{9\times10^{9}\times40\times10^{-6}\times80\times10^{-6}}{2}=\dfrac{9\times10^{9}\times40\times10^{-6}\times80\times10^{-6}}{x}+0[/tex]

[tex]16+14.4=\dfrac{28.8}{x}[/tex]

[tex]30.4x=28.8[/tex]

[tex]x=\dfrac{28.8}{30.4}[/tex]

[tex]x=0.947\ m[/tex]

Hence, The distance separating the two particles when the moving particle is momentarily stopped is 0.947 m

The distance separating the two particles when the moving particle is momentarily stopped is 0.947 m.

The given parameters;

The kinetic energy is zero at the instant the moving particle is momentarily stopped.

The distance separating the two particles when the moving particle is momentarily stopped is calculated as follows;

[tex]K.E_1 \ + W_1 = K.E_2 + W_2\\\\K.E_1 + \frac{kq_1q_2}{x_1} = K.E_2 + \frac{kq_1q_2}{x_2} \\\\16 \ + \ \frac{(9\times 10^9)\times (40\times 10^{-6})\times (80\times 10^{-6})}{2} = 0 \ + \ \frac{(9\times 10^9)\times (40\times 10^{-6})\times (80\times 10^{-6})}{x_2} \\\\30.4= \frac{28.8}{x_2} \\\\x_2 = \frac{28.8}{30.4} \\\\x_2 = 0.947 \ m[/tex]

Thus, the distance separating the two particles when the moving particle is momentarily stopped is 0.947 m.

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Answer:

30's-40's

Explanation:

Answer:

8.042m

Explanation:

Ep = mgh

given that ,

m = 110.8kg

h =?

g = 9.81 m/s^2

Ep= 8741J

8741= 110.8 × 9.81 × h

h= 8741 ÷ ( 110.8 × 9.81 )

h = 8.042m

Answer:

Option C) Fluorine and Chlorine.

Explanation:

According to the given options; the two elements that have similar characteristics are Fluorine and Chlorine.

As both the elements belong to the same group in the periodic table which is the halogen group and they have the same valency although their reactivities differ. Fluorine is more reactive than chlorine if compared. They both are placed in the same group which is Group 7 in the modern periodic table. As both the elements have 7 electrons in their outermost shell.

Answer:

No.

Explanation:

Because the acceleration of falling objects is constant and is not affected by mass

Answer: no

The acceleration of an object is equivalent to the gravitational acceleration. The size, shape, and weight of an item are not a cause in the motion of the object. So all objects, regardless of its mass, size, or shape fall freely with the same acceleration.

Answer:

Being attentive is the best way to demonstrate respect.

Explanation:

Answer:

when The spoon is pulled down with a small amount of energy : short distance travelled by Marsh mallow

When the spoon is pulled down with a higher amount of energy : Long distance travelled by Marshmallow

Explanation:

when The spoon is pulled down with a small amount of energy :

After the release of the spoon  the Marshmallow travels a relatively short distance because the acceleration is < mass of the mass of the Marshmallow

F = ma. hence a = F/m    where a < m

When the spoon is pulled down with a higher amount of energy

After the release of the spoon the marshmallow travels a relatively long distance when compared to the application of small amount of energy

Answer:

The answer is 20 miles/hr

Explanation:

The acceleration of the object is determined as -2.5 m/s².

Acceleration is the rate of change of velocity with time.

Mathematically, acceleration is given as;

a = Δv/Δt

a = (v₂ - v₁)/(t₂ - t₁)

where;

From the graph;

the initial velocity = 40 m/s

the final velocity = 10 m/s

the final time = 12 seconds

the initial time = 0 second

acceleration = (10 - 40) / (12 - 0)

acceleration = -30/12

acceleration = -2.5 m/s²

Thus, the acceleration of the object is determined as -2.5 m/s².

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Answer:

Apply Newton's second law in the moving direction.

Explanation:

[tex]\begin{aligned}F &= ma\\5N-2N &= 25kg\times a\\a & = \frac{3N}{25kg}\\&= 0.12ms^{-2}\end{aligned}[/tex]

Friction force applies in the opposite direction of motion; as a restriction.

Answer:

Full moon would be seen.

Explanation:

The moon is the natural planet of the earth, which orbits the earth and thus the Sun. It takes 29.5 days for a complete revolution, passing from one phase to another in the process.

Whenever a new moon is observed, it would take 14 days i.e 2 weeks before it turns to a full moon. Thus with respect to the given question, a full moon would be seen.

Answer:

There will be two forces acting on her: Gravitational force and Air resisitence

Answer:

2.204x10^2 -2 = 0.02204 in scientific notation.

Answer:

1 inch = 2.54 cm

12.9 inches= 12.9 x 2.54

= 32.766

= 32.8 cm (approximately)

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Answer:

B) I just solved it

Explanation:

Answer:

550 meters west

Explanation:

Givens: Inital velocity/vi= 5.0m/s, time/t=60.0s, acceleration/a= 0 because a constant velocity means 0 acceleration, inital position/xi=250m

Unknown: final position/xf=?

Formula: xf=xi+vi(t)+1/2at^2

xf=250m+5.0m/s(60.0s)+1/2(0)(60.0s)^2

xf=250m+300m

xf=550m west

its still west because he never chhanged direction therefore his postion kept increasing.

Answer:

Explanation:

The force acting on an object given it's mass and acceleration can be found by using the formula

From the question

mass = 1,460kg

acceleration = 2.04 m/s²

We have

force = 1460 × 2.04

We have the final answer as

Hope this helps you