Which of the following are possible ways to rotate the turbine in a generator?

steam


wind

falling water

all of the above

Answer:

The atmospheric pressure is greatest at the bottom of the atmosphere. This is also where the air has its greatest density. Pressure and density decrease with height in the atmosphere. The earth's gravitational field pulls the mass of the atmosphere towards the earth's surface

Answer:

C.Conflict often occurs over natural resources.

Explanation:

Conflict always occurs if two countries or groups fight over anything that both think is theirs.

UN seems to agree: https://peacekeeping.un.org/en/conflict-and-natural-resources

Answer:

The percent error in his estimation is 30%

Explanation:

Percentage error = |UA- UE| \ UE × 100

UA= Actual value = 7 pounds

UE = Expected value = 10 pounds

Percent error of his estimate = ∣7-10∣ / 10 ×100

= ∣-3∣ / 10 × 100

= 30%

The spring constant will be k= 5.5N/m for a 200g air track glider attached to a spring.

The spring constant, k, is a measure of the stiffness of the spring. It is different for different springs and materials.

Calculation for What is the spring constant

First step is to calculate the time period

T = 12 second/10

T = 1.2 second

Now let calculate the spring constant using this formula

[tex]k=\dfrac{4\pi ^2m}{T^2}[/tex]

Where,

m=0.2kg

T=1.2second

k represent spring constant=?

Let plug in the formula

[tex]k=\dfrac{4 \pi \times 0.2}{(1.2)^2}[/tex]

[tex]k=\dfrac{39.48\times 0.2}{1.44}[/tex]

[tex]k=\dfrac{7.90}{1.44}[/tex]

k=5.48 N/m

k=5.5 N/m ( Approximately)

Therefore the spring constant will be 5.5 N/m

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Answer:

The frequency is =2⋅10 18 H z

Explanation:

Apply the equation

Frequency

×

Wavelength

=

Speed

f

×

λ

=

c

The wavelength is

λ

=

1.5

⋅

10

−

10

m

The speed is

c

=

3

⋅

10

8

m

s

−

1

The frequency is

f

=

c

λ

=

3

⋅

10

8

1.5

⋅

10

−

10

=

2

⋅

10

18

H

zApply the equation

Frequency

×

Wavelength

=

Speed

f

×

λ

=

c

The wavelength is

λ

=

1.5

⋅

10

−

10

m

The speed is

c

=

3

⋅

10

8

m

s

−

1

The frequency is

f

=

c

λ

=

3

⋅

10

8

1.5

⋅

10

−

10

=

2

⋅

10

18

H

z

It is possible to predict the speed that a coaster will reach before it is ever placed on the track  by using the conservation of energy principle.

The principle of energy conservation states that energy can neither be created nor destroyed. It may transform from one form to another form.

Just like in roller coaster, velocity at the maximum height is predicted by using this principle. At the maximum height, potential energy is maximum and kinetic energy is minimum.

Thus, It is possible to predict the speed that a coaster will reach before it is ever placed on the track  by using the conservation of energy principle.

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The final temp of the gold cube will be 30.773 °C. The heat absorption principle is used in the given problem.

The amount of heat required to increase a substance's temperature by one degree Celsius is known as specific heat capacity.

Similarly, heat capacity is the relationship between the amount of energy delivered to a substance and the increase in temperature that results.

Mathematically, specific heat capacity is given by;

\rm Q= Ms \triangle t

Where,

Q is the amount of energy necessary to raise the temperature

M is the mass

Δt is the time it takes to raise the temperature.

s stands for specific heat capacity

While t stands for temperature change.

The given data in the problem is;

The energy required to raise the temperature is 430 joules.

M is the mass of gold = 250 g

s is the specific heat capacity of silver= (0.3 J/°Cg),

ΔT is the temperature fluctuation

The specific heat capacity is given by;

[tex]\rm Q= Ms \triangle t \\\\ \rm 430= 250 \times 0.3 \times (T_f-25)\\\\ T_f=30.773 ^0 C[/tex]

Hence,the final temp of the gold cube will be 30.773 °C.

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The statement which are Aristotle’s beliefs about motion EXCEPT option a.

Aristotle's theory of motion believed that all motion was centered upon the object trying to reach its natural resting position.

The theory states that it requires a force to make an object move in an unnatural" manner.

Until and unless a force is applied, the motion is continued or remains stopped.

Thus, all the statements are correct except Objects move according to natural tendencies.

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Answer:

KE = incident energy - work function

The maximum KE will be (3 - .6) eV = 2.4 eV

If the resistance decreases to (1/4) of its original value while the voltage remained constant, the resulting current is 8A.

Option D) is the correct answer.

Ohm’s law states that "the potential difference between two points is directly proportional to the current flowing through the resistance.

It is expressed as;

V = I × R

Where V is the voltage or potential difference, potential difference, I is the current and R is the resistance.

Given that the circuit has a current of 2A, this means;

V = 2A × R

Next, the resistance in the circuit decreases to one-fourth of its original amount while the voltage remains constant

V = I' × (1/4)R

So we can equate.

2A × R = I' × (1/4)R

2A × R = I' × R/4

2AR = I'R/4

8AR = I'R

I' = 8AR / R

I' = 8A

If the resistance decreases to (1/4) of its original value while the voltage remained constant, the resulting current is 8A.

Option D) is the correct answer.

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Answer:

According to Japanese legend, Himiko was the daughter of the emperor Suinin (fl. 1st century bc–1st century ad), who gave her custody of the sacred mirror, symbol of the sun goddess. In 5 bc she supposedly enshrined the mirror at Ise, a city of present Mie Prefecture.

The value of inductance, when N inductor has a peak current of 330 μa when the peak voltage at 44 mhz is 2.8 v, is 8.485×10³ H.

The inductance is the ability or the property of an electric conductor by which it opposes the amount of current flowing from it. It can be calculated with the following formula.

[tex]X_L=\dfrac{V_{rms}}{I_{rms}}[/tex]

Here, V is voltage and I is current value.

N inductor has a peak current of 330 μa when the peak voltage at 44 mhz is 2.8 v. Put the values in the above formula as,

[tex]X_L=\dfrac{V_{rms}}{I_{rms}}\\X_L=\dfrac{2.8}{330\times10^{-6}}\\X_L=8.485\times10^3 \rm \;H[/tex]

Thus, the value of inductance, when N inductor has a peak current of 330 μa when the peak voltage at 44 mhz is 2.8 v, is 8.485×10³ H.

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Answer:

The Mass of an object.

Explanation:

Hope this helped!!

The half-life of a substance is the time the substance takes to decay until the amount of the sample is half of its initial amount.

In this problem, the half-life of iodine-131 is 8 days. This means that after 8 days, only half of the initial sample will be left. After another 8 days (16 days), the sample will be reduced by another factor 1/2, so only 1/4 of the initial sample will be left.

Since the initial sample was 0.96 g, after 16 days the amount of iodine left is m = 1(0.96g) = 0.24g

Answer:

24 days

Explanation:

This is because the half-life is eight days. If you add another half-life, which will be 16 days, 1/4 of the sample remains, and if you add another half-life which is 24 days, 1/8 will remain.

Answer:The role of a hotel manager is an incredibly varied one, and for many leading hotel managers, no two days are ever the same. While this does make the role a hugely inspiring and motivating one, it also means that success requires a very broad set of skills.The best hotel managers are hugely experienced in a wide range of different areas, and have plenty of tips and tricks up their sleeves. From managing budgets to motivating team members, hotel managers need to be able to do it all.Whether you’re an experienced hotel manager looking to brush up on your knowledge, or you’re a budding hospitality team member hoping to rise through the ranks, there are plenty of ways to improve.Focus on skills that develop your leadership potential, and try to gain a more thorough understanding of the most important aspects of your business. Dedicate your time to improving your budgeting skills, understanding how to motivate team members, and ensuring that nothing that happens in your hotel escapes your notice.If you want to put your hotel on the map, you should also be keeping an eye out for emerging trends, and making sure you’re in the know when it comes to all things hospitality. Do this well and you’ll soon be able to spot the next big thing before it happens, and consistently impress both your guests and your team members.Be present in your hotelAll too often we hear of hotel managers so swamped by admin duties that they spend the vast majority of their time in the office. And while hotel managers do need to be at their desks from time to time, neglecting time in the hotel to get ahead on paperwork is often a mistake.Hotel managers need to know their hotel inside out. They need to know how different processes work, how teams interact with each other, and where any problem areas might lie.They need to be able to spot an issue before a guest does and make sure that all team members are fulfilling their duties with the utmost care and attention. And that can’t be done from a desk.A good hotel manager should be spending a considerable proportion of their day in the hotel, observing all that goes on – and talking to guests and staff. There’s no substitute for time spent in the hotel, so make sure you’re present!Motivate team membersThe ability to manage and motivate a team is one of the key responsibilities of a hotel manager, and it’s absolutely essential if the business is to be a success. It’s no secret that a well-motivated team will always outperform an apathetic one, and in hospitality staff motivation really matters.Great leadership skills start with the ability to motivate, inspire and engage. Focus on ways to get staff on board with your ideas, and make sure they’re excited about the future of the business.Give staff opportunities to grow within the business, and retain top talent by providing a clear pathway to promotions, bonuses, and other rewards.

1

5

8

3

5

9

there ya go, good luck pal

Since dehydration is due to lack of water, sweating excessively is Not a sign of extreme dehydration.

Dehydration is a condition in which the body lack a enough water necessary for metabolic activities.

Dehydration results in extreme physical conditions of the body such as fatigue.

Some signs of extreme dehydration include:

Therefore, sweating excessively is Not a sign of extreme dehydration.

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Considering the Charles's Law, the volume change by a factor of [tex]\frac{473 }{298 }[/tex] or 1.587.

Charles's Law consists of the relationship that exists between the volume and the temperature of a certain amount of ideal gas, which is maintained at a constant pressure, by means of a proportionality constant that is applied directly.

In other words, Charles' law states that the volume is directly proportional to the temperature of the gas: if the temperature increases, the volume of the gas increases: while if the temperature of the gas decreases, the volume decreases.

Mathematically, Charles's law is a law that says that when the amount of gas and pressure remain constant, the ratio between volume and temperature will always have the same value:

[tex]\frac{V}{T} =k[/tex]

Considering an initial state 1 and a final state 2, it is true that:

[tex]\frac{V1}{T1} =\frac{V2}{T2}[/tex]

In this case, you know:

Replacing in Charles's law:

[tex]\frac{V1}{298 K} =\frac{V2}{473 K}[/tex]

Solving:

V2=[tex]473\frac{V1}{298 K}[/tex]

V2=[tex]\frac{473 K}{298 K}V1[/tex]= 1.587 V1

Finally, the volume change by a factor of [tex]\frac{473 }{298 }[/tex] or 1.587.

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E = mc²

E = 1 x 10⁻⁹ x (3.10⁸)²

E = 9 x 10⁷ J

Answer:

drag

Explanation:

drag is the force that acts against any moving object.

if it takes him any amount of time to get from one speed to another, it is caused by drag.

The mastodon die approximately 13,700 years ago (the half-life of this isotope is 5,730 years).

Carbon-14 dating is the estimation of a period due to the decay in the amount of this radioactive isotope (C14).

This approach (Carbon-14 dating) is well known to estimate the age of different types of fossils, either plants or animals.

In conclusion, the mastodon die approximately 13,700 years ago (the half-life of this isotope is 5,730 years).

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Answer:

by the question there is already given a weight of pizza. so its weight is 6kg

Answer:

A to jump

Explanation:

hope this helpes!

Answer:

trigonometry (guessing)

Explanation:

ellipse: is the shape of an orbit : looks like an oval

periapsis : shortest distance between something like the moon and the planet its orbiting around like the earth

parallax is triangulation. like how gps works. looking at a star one day and then looking at it again 6 months later, an astronomer can see a difference in the viewing angle for the star. With trigonometry, the different angles yield a distance. This technique works for stars within about 400 light years of earth

https://science.howstuffworks.com/question224.htm

By comparing the intrinsic brightness to the star's apparent brightness we can calculate the distance of stars

1/r^2 rule states that the apparent brightness of a light source is proportional to the square of its distance.Jan 11, 2022

https://www.space.com/30417-parallax.html

alternative distance measurement for stars used by most astronomers is the parsec. A star with a parallax angle of 1 arcsecond has a distance of 1 parsec, or 1 parsec per arcsecond of parallax, which is about 3.26 light years

blossoms.mit.edu

.

Answer:

Explanation:

[tex]d=\sqrt{a^{2}+b^{2} } \\where;\\a=10\\b=8[/tex]

Answer:

I think the answer is C.

Explanation:

the verticale distance of a wave from its crest to its trough

Answer:

I don't know to be honest