A pendulum is lifted to a certain height and then released, which causes the
pendulum to swing back and forth. If energy losses due to friction and air
resistance can be ignored, when is the energy of the system at its maximum
value?

Answer: The power station converts stored chemical energy in the fuel to kinetic energy in the raised temperature of the steam that pushed a turbine to rotate the generator that makes electricity.

So chemical to thermal (kinetic) to thermal to kinetic to electrical. Then mostly to heat or movement.

Loads of losses, thermal, mostly.

Explanation: hopes this helps

In all of the power plants, electricity is generated by rotating turbine inside a magnetic field. That is why,  power plant transfers mechanical energy into electric energy. That is why, it  doesn’t make electricity.

An industrial facility for the production of electricity is referred to as a power plant. In most cases, power plants are wired into a grid.

A revolving device called a generator, which transforms mechanical power into three-phase electric power, is found in many power plants. An electric current is produced by the movement of a conductor in relation to a magnetic field.

The majority of power plants throughout the world produce electricity by burning fossil fuels including coal, oil, and natural gas. Nuclear energy and the usage of renewable energy sources including solar, wind, geothermal, and hydroelectricity are examples of low-carbon power sources.

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Answer:

Spring High Tide

When the moon is full or new, the gravitational pull of the moon and sun are combined. At these times, the high tides are very high and the low tides are very low.

Answer:

16  2/3 hr

Explanation:

250 000 km / 15 000 km/hr =  16 2/3 hours

Answer:

moving away

Explanation:

They are moving AWAY from earth making the wavelengths longer than what was emitted....this is called 'Red Shift'.... longer waves is a shift toward the RED end of the spectrum ..   (ROY G BIV)

Explanation:

identified by one of the Chi Omega survivors as the assailant, and hair and fiber evidence tied him to the Leach murder. His trial for the Florida attacks in June 1979 was the first-ever nationally televised trial in the United States.

Answer:

31.25 m

Explanation:

The foul ball experiences upward linear motion thus:

initial velocity(u) - 25m/s

final velocity(v) - 0m/s

velocity due to gravity - -10m/s2 (since the ball moves upwards)

Hence:

v2=u2+2(gs)

0=625+2(-10*s)

0=625-20s

-625=-20s

s=31.25m

The material will go as high as 91.54 km would this material go on earth if it were ejected with the same speed as on Io.

The height of the material on earth will be derived from the given values as follows:

Tue acceleration due to gravity on Io, go is given as:

[tex]g_o = \frac{GM}{r^{2}}[/tex]

Substituting the values:

[tex]g_o= \frac{6.67×10^{-11}×8.93×10^{22}}{1821000^{2}}[/tex]

[tex]g_o = 1.796 m/s^{2}[/tex]

Height on earth, He and Height on Jupiter H is given as follows:

[tex]H_e = \frac{v^{2}}{2g}[/tex]

[tex]H = \frac{v^{2}}{2g_o}[/tex]

Taking ratio of the two heights and solving for height on earth, He:

[tex]H_e = H × \frac{g_o}{g}[/tex]

Substituting the values:

[tex]H_e = 500000 × \frac{1.796}{9.81} = 91539.245 m[/tex]

Therefore, the material will go as high as 91.54 km would this material go on earth if it were ejected with the same speed as on Io.

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Answer:

40 m

Explanation:

4 m/s   * 10 s   = 40 m  

  ( see how the 's' cancels out and you're left with "m" as your answer?)

The three highest-power appliances that can be plugged into two outlets and be running at the same time are air conditioner, washing machine and popcorn popper.

The current of each appliance is calculated as follows;

P = IV

I = P/V

air conditioner (1000 W), I = 1000/120 = 8.33 A

refrigerator (450 W), I = 450/120 = 3.75 A

washing machine (500 W), I = 500/120 = 4.17 A

popcorn popper (250 W), I = 20/120 = 0.17 A

The three highest-power appliances that can be plugged into two outlets;

8.33 A +  4.17 A + 0.17 A = 12.67 A, which is less than 15 A.

Thus, the three highest-power appliances that can be plugged into two outlets and be running at the same time are air conditioner, washing machine and popcorn popper.

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Answer:

f

Explanation:

If the masses of the objects are both doubled to 600 kg each, the force between them will be 40N.

The Newton's law of universal gravitation states that, force of gravity between two objects is directly proportional to the product of the masses and inversely proportional to the square of the distance between them.

As such;

F = Km1m2/r^2

If the masses of the objects are doubled but the distance of separation remains the same, it follows that the force between the masses will also be doubled.  Hence, if the masses of the objects are both doubled to 600 kg each, the force between them will be 40N.

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Answer:

9.8 m / s^2

Explanation:

Assuming free fall====> there is no initial downward/upward velocity

  Assuming metric units   78.4  m/s

 vf = a t

 78.4 = a (8)     shows     a = 9.8 m/s^2

Answer:

Hey

I'm alright and you

I also hope you're doing well

When an object is thrown at an angle from the horizontal, the path followed by the body is called the projectile motion. The duration in seconds that the object is above the height of 14 m is 4.698 s.

Speed is the time rate at which velocity is changing.

Vertical speed component is

V₀y = 52sin 30°= 26 m/s

Given is the height h=14m

Using second equation of motion,

S=ut+ 1/2 at²

Substituting the values, we get

14 = 26t - 4.9t²

4.9t² - 26t +14 =0  

Solving the quadratic equation, we get the time as

taking the positive sign, t =4.698 s

taking the negative sign , t = 0.6082 s

Thus, the duration in seconds that the object is above the height of 14 m is 4.698s.

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When q₂ is place between q₁ and q₃, the net force on q₂ is 0.486N.

The electrostatic force of attraction or repulsion is proportional to the product of magnitude of charges and inversely proportional to the square of distance between them.

Force on q₂ due to q₁

F₁₂ = kq₁q₂ / r₁₂²

Substitute the values provided , we get

F₁₂ = 9 x 10⁹ x 5 x 10⁻⁶ x 2.5 x 10⁻⁶ / (0.5)²

F₁₂ = 0.414 N

Force on q₂ due to q₃ placed at distance 0.25m

F₂₃ =kq₂q₃ / r₂₃²

Substitute the values, we get

F₂₃ =  9 x 10⁹ x 2.5 x 10⁻⁶ x 2.5 x 10⁻⁶ / (0.25)²

F₂₃ = 0.9N

The net force F =F₂₃ -F₁₂

F =0.9 - 0.414 = 0.486 N

Thus, the net force of q₂ is 0.486 N.

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Answer:

0.45

Explanation:

trust me

Answer:

A. That it is expanding.

Answer:

0

Explanation:

Physically:

Beginning point means initial point so you're basically going into circles which means a displacement of zero.

Mathematically:

[tex]d = x _{f} - x _{i}[/tex]

We know

[tex]x _{f} =x _{i}[/tex]

So we get

[tex]d = x _{f} - x _{f}[/tex]

[tex]d = 0[/tex]

Answer:

27 N

Explanation:

It will be the force of the book  1.2 kg * 9.81 m/s^2   PLUS the force of your hand  15.3 N    ..... it will be in the OPPOSITE direction

1.2 * 9.81 + 15.3 = ~27.1 N

Answer:

gravity

Explanation:

as the earth rotates on an axis, it causes an effect known as centripetal acceleration with is an acceleration that pulls objects towards the center of the object. in planets, we call this Gravity

Answer:

See below

Explanation:

The initial downward velocity, the acceleration of gravity and air friction all play a part

#Jennifer

Answer:

The specific heat capacity is defined as the quantity of heat (J) absorbed per unit mass (kg) of the material when its temperature increases 1 K (or 1 °C), and its units are J/(kg K) or J/(kg °C).

Answer:

.0297 ms

Explanation:

period = 1 / f = 1 / 33621 = .0000297 seconds= .0297 ms

Answer:

i dont know

Explanation:

sorry i cant answer this question

Answer:

Gotta be it

Explanation:

m1*v1 = m2*v2

1200*v1 = 1600*3

1200*v1  = 4800

v1 = 4800 / 1200

v1 = 4.0 m/s

f = μk.N (N = m.g)

f = 0.29 x 95 x 10

f = 275.5 N

Solved your another question same like this with scaling to Cm this time we go with metre(m)

Scale factor

Mercury

Ven us

Earth

Mars

Jupiter

Saturn

Uranus

Neptune

Answer:

air does not have a modulus of rigidity.

Explanation:

Since air is completely elastic medium, that is, it does not have a modulus of rigidity, therefore sound waves in air are longitudinal.

A limitation of this model is that it can't be tested practically in order to check its validity.

Models are representations of scientific data that can help in defining, analyzing, and communicating many concepts. These models are developed in order to do analysis, specification, design, verification, and validation of a system.

So we can conclude that a limitation of this model is that it can't be tested practically in order to check its validity.

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Answer:

Earth's tilted axis causes the seasons. Throughout the year, different parts of Earth receive the Sun's most direct rays. So, when the North Pole tilts toward the Sun, it's summer in the Northern Hemisphere. And when the South Pole tilts toward the Sun, it's winter in the Northern Hemisphere.

Explanation:

It's all about Earth's tilt!

Claim:- Many people believe that Earth is closer to the Sun in the summer and that is why it is hotter. And, likewise, they think Earth is farthest from the Sun in the winter.

Although this idea makes sense, it is incorrect.

It is true that Earth's orbit is not a perfect circle. It is a bit lop-sided. During part of the year, Earth is closer to the Sun than at other times. However, in the Northern Hemisphere, we are having winter when Earth is closest to the Sun and summer when it is farthest away! Compared with how far away the Sun is, this change in Earth's distance throughout the year does not make much difference to our weather.

There is a different reason for Earth's seasons.

Reasoning:- earth's axis is an imaginary pole going right through the center of Earth from "top" to "bottom." Earth spins around this pole, making one complete turn each day. That is why we have day and night, and why every part of Earth's surface gets some of each.

Earth has seasons because its axis doesn't stand up straight.

But what caused Earth to tilt?

Long, long ago, when Earth was young, it is thought that something big hit Earth and knocked it off-kilter. So instead of rotating with its axis straight up and down, it leans over a bit.

By the way, that big thing that hit Earth is called Theia. It also blasted a big hole in the surface. That big hit sent a huge amount of dust and rubble into orbit. Most scientists think that that rubble, in time, became our Moon.

As Earth orbits the Sun, its tilted axis always points in the same direction. So, throughout the year, different parts of Earth get the Sun’s direct rays.

Sometimes it is the North Pole tilting toward the Sun (around June) and sometimes it is the South Pole tilting toward the Sun (around December).

It is summer in June in the Northern Hemisphere because the Sun's rays hit that part of Earth more directly than at any other time of the year. It is winter in December in the Northern Hemisphere, because that is when it is the South Pole's turn to be tilted toward the Sun.

Earth's lopsided orbit

Evidence- Earth's perihelion (point closest to Sun) = 91,400,000 miles from Sun

Earth's aphelion (point farthest from Sun) = 94,500,000 miles from Sun

While that is a difference of over 3 million miles, relative to the entire distance, it isn’t much.

And, believe it or not, aphelion (when Earth is farthest from the Sun) occurs in July, and perihelion (when we are closest) occurs in January. For those of us who live in the Northern Hemisphere where it's summer in July and winter in January, that seems backwards, doesn't it? That just goes to prove that Earth's distance from the Sun is not the cause of the seasons.

Answer:

Earth's tilted axis causes the seasons. Throughout the year, different parts of Earth receive the Sun's most direct rays. So, when the North Pole tilts toward the Sun, it's summer in the Northern Hemisphere. And when the South Pole tilts toward the Sun, it's winter in the Northern Hemisphere.

Hope it helps..