What is the benefit of using simple computational models in a spreadsheet application, to predict mechanical energy and related values?

A. It is easy to learn new concepts.
B. It is easy to detect calculation errors.
C. It is easy to calculate new scenarios.
D. It is easy to compare different cases.

Answer:

Solid state of matter

Answer:

P=mgh

P=mghm=55

P=mghm=55g=9.8 or ~10

P=mghm=55g=9.8 or ~10h=27

Explanation:

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Answer:

\(K.E = \frac{1}{2} mv {}^{2} \)

m = 10m/s

mass = 0.5kg

\(K.E = \frac{ {1} }{2} \times 0.5 \times 10 ^{2} \\ = K.E = \frac{1}{2} \times50 \\ \)

K.E = 25 J

Answer:

Basketball players

Explanation:

Basketball players

Connected capacitor: doubling plate separation has no energy effect. Isolated capacitor: separation decreases by 4x, doubling potential difference increases energy by 4x. Specific heat capacity needed for 4.0-F capacitor's potential difference heating water.

(a) In an isolated capacitor, if the separation of the plates is doubled, the capacitance (C) is halved (C' = C/2). The energy stored in a capacitor is given by the formula U = (1/2)CV², where U is the energy, C is the capacitance, and V is the potential difference. Thus, if the separation is doubled, the new energy stored becomes U' = (1/2)(C/2)V² = (1/4)CV², resulting in a decrease by a factor of 4.

(b) When the potential difference (V) across the plates of an isolated capacitor is doubled, the energy stored becomes U' = (1/2)CV'², where V' is the new potential difference. Doubling the potential difference yields U' = (1/2)C(2V)² = 4CV², which represents an increase by a factor of 4.

Determining the potential difference across the plates of a 4.0-F capacitor that can heat 2.8 kg of water requires additional information such as the specific heat capacity of water and the amount of energy needed to heat the water from 21°C to 95°C.

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Hope you could understand.

If you have any query, feel free to ask.

A 5 kg and a 10 kg sphere are kept 0.3 m apart, so the force of attraction between them is 3.705 × 10⁻⁸ N.

A force that draws the body in due to its attraction is known as a force of attraction. Nature is ruled by a variety of alluring forces. Magnetic, electric, electrostatic, and gravitational forces are a few of them. Because it attracts objects to itself from any distance, gravitational force is a very well-known example of attraction.

More details regarding how this force operates are provided by Newton's universal law of gravity. According to this theory, every mass that exists in the universe attracts one or more other masses. It supports the idea that everyone who vomits comes down.

Given information,

mass, m₁ = 5 kg

mass, m₂ = 10 kg

Distance, r = 0.3 meters.

\(F=G\ \frac{m_1m_2}{r^2}\)

Substitute all the values in the formula :

F = [(6.67 × 10⁻¹¹) × 5 × 10] / (0.3)²

F = (6.67 × 10⁻¹¹ × 50) / 0.09

F = 3.70 × 10 ⁻⁸ N.

So, the force of attraction between them is F = 3.70 × 10 ⁻⁸ N.

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Answer:

P = 15 [W]

Explanation:

Power is defined as the relationship between work over a certain time.

In this way we must calculate the work which is defined as the product of force by distance.

\(W=F*d\\W=75*20\\W=1500[J]\)

And the power.

\(P=W/t\\P=1500/100\\P=15[W]\)

Power given in units of watts.

Answer:

Explanation:

Magnetic field = permeability x turn density x current

Magnetic field = 0.22T

turn density = 4150 /1.6 = 2593.75 t/m

permeability : µ = k µ°

µ°= 4 π 10^-7

k = 1

I = 0.22 / 4 π 10^-7 * 2593.75 = 0.22 10^7 /32594 = 67.497 A

In the first direct detection of gravitational waves by LIGO in 2015, the waves came from the merger of two black holes. Option B is correct. This is further explained below.

A gravitational wave is simply defined as a ripple in space that is unseen though extremely rapid. Gravitational waves move at light speed. As they pass past, these waves compress and stretch everything in their path.

In conclusion, the merger of two black holes is the first direct detection of gravitational waves.

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Answer:

C=A>B>E>D

Explanation:

Answer:

fluid friction

Explanation

Hope this helps

120m per minute

If you take 960 and divide it by 8 you get 120 then you have the answer 120m per minute

At the inlet Mach number combustor of a supersonic combustion ramjet (SCRAMjet), the flow Mach number is supersonic is 0.2066R°.

To determine the inlet Mach number above which the flow will be unchoked in a supersonic combustion ramjet (SCRAMjet), additional information is needed. The provided information includes the fuel-air ratio, combustor exit temperature, and heat release per slug of fuel, but it does not directly provide the necessary data to calculate the inlet Mach number. The specific equation or relationship to determine the unchoked flow condition is not specified in the given question.

p1 = 10 atm, T1 = 1000 R, and M1 = 0.2.

Po1 = (1.028)*(10) = 10.28 atm, according to the Steam Table.

To1 = (1.008)*(1000) = 1008 ºR

Fuel-air ratio (by mass): 6006 ft-lb/slug; R = 1716 ft-lb/slug.

4.5 x 108 ft-lb/slugfx = FA slugf/slugaq (4.5 x 108)FA ft-lb/slug = FA slugf/sluga

Q is equal to cp(To2-To1) for air.

For M1=0.2, a constricted flow is considered to be (Exit flow - Inlet flow).

The given information includes the fuel-air ratio, combustor exit temperature, and heat release per slug of fuel. However, the specific equation or relationship required to calculate the inlet Mach number for unchoked flow is not provided in the question. The determination of the inlet Mach number would typically involve the use of equations related to compressible flow and the analysis of the flow properties.

To calculate the inlet Mach number for unchoked flow, additional data such as the specific heat ratio (k) at constant pressure and specific heat ratio (k) at constant volume would be needed. Additionally, the fuel-air ratio alone may not be sufficient to determine the flow properties and the unchoked condition.

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Answer:

11

Explanation:

The ideal mechanical advantage of a lift would be 11, which allows you to raise a 90.0 - kg refrigerator with 80.0 N of force, therefore the correct answer is option A .

Mechanical advantage is defined as a measure of the ratio of output force(load) to the input force(effort) in a system, It is used to analyze the forces in simple machines like levers and pulleys .

Mechanical advantage = load / effort

As given in the problem we have to find out the e ideal mechanical advantage of a lift that allows you to raise a 90.0-kg refrigerator with 80.0 N of force ,

The mechanical advantage of the lift = 90 × 9.8 / 80.0

                                                              = 11

Thus , the ideal mechanical advantage of a lift would be 11 ,

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The proper order of storm intensity in terms of increasing wind speed is tropical depression, tropical storm, category 1 hurricane, category 2 hurricane, category 3 hurricane, category 4 hurricane, and category 5 hurricane.

A tropical depression is a storm system with maximum sustained winds of up to 38 mph. When the sustained winds increase to 39 to 73 mph, it becomes a tropical storm. A category 1 hurricane has maximum sustained winds of 74 to 95 mph, while a category 2 hurricane has sustained winds of 96 to 110 mph. A category 3 hurricane has sustained winds of 111 to 129 mph, a category 4 hurricane has winds of 130 to 156 mph, and a category 5 hurricane has sustained winds of 157 mph or higher.

It's important to note that wind speed isn't the only factor that determines a storm's intensity. Other factors include storm surge, rainfall, and the size of the storm. However, wind speed is a key component in determining a storm's category and potential impact.

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Answer:

H=1 /2 gt^2= (10)(5.8)^2

Several factors need to be considered before replacing the power supply of a computer, such as: Power Requirements, Form Factor, Connectors, Efficiency Rating, Price

Power Requirements: It is important to ensure that the replacement power supply has enough wattage to support all the components in the computer. An insufficient power supply can cause stability issues or even damage to the components. Form Factor: The form factor of the  must be compatible with the computer's case. Most standard ATX power supplies should fit in a standard ATX case, but it is essential to double-check the dimensions to ensure compatibility.Connectors: The replacement power supply should have the necessary connectors to power all the components in the computer. The motherboard, graphics card, and other components may require specific connectors. Efficiency Rating: A power supply with a higher efficiency rating will consume less power and produce less heat, which can help to reduce the overall temperature of the computer. Price: The cost of the replacement power supply is also an important factor to consider. Higher-quality power supplies may be more expensive, but they can provide better performance and reliability.By considering these factors before replacing the power supply, you can ensure that the replacement power supply is compatible with your computer and meets your power requirements.

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Answer:2n

Explanation:10/5=2

"Code Talker: The First and Only Memoir by One of the Original Navajo Code Talkers of WWII" is a book written by Chester Nez in collaboration with Judith Schiess Avila. It is an autobiography of the author and his experiences in World War II as a Navajo code talker.

The Navajo Code Talkers were an elite group of Navajo Marines who used their language to develop a code that could not be deciphered by the enemy. The Japanese had broken all American codes, so the Marines wanted to create an unbreakable code. The Navajo language, which had no written form, was the perfect solution. Navajo Code Talkers developed an intricate code that used their language's complex syntax, tonal qualities, and dialects. It proved to be the only code that the Japanese couldn't break.

The Navajo Code Talkers took part in every major Marine operation in the Pacific, from Guadalcanal to Okinawa. Chester Nez, the book's author, was one of the original Navajo Code Talkers. He was born in New Mexico in 1921 and was educated in a boarding school where he was forbidden from speaking his native Navajo language. Chester Nez was a U.S. Marine who was recruited in 1942 and became a part of the Navajo Code Talkers program. He was a member of the 382nd Platoon and served in the Pacific, where he worked as a radio operator.

Code Talker is about the Navajo Code Talkers, the Marine unit that used the Navajo language to develop an unbreakable code that played a crucial role in the U.S. victory over Japan in World War II. The book offers a first-hand account of what it was like to be a Navajo Code Talker during the war, as well as the impact that the code talkers had on the outcome of the war. Chester Nez provides an in-depth look at Navajo culture and history while telling his own personal story of growing up on the Navajo reservation and joining the Marine Corps.

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Your shoes get electrons from the carpet and get negatively charged. The electrons spread upward until your whole body has a negative charge in it. The negative charge in your hand pushes back electrons on the doorknob. The front of the doorknob gets a strong positive charge. Electrons jump from your hand to the doorknob.

You feel this electron jump as a doorknob shock.

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The heavy person will reach the ground first. This is because both individuals have the same parachute size, meaning they experience the same amount of air resistance. However, the heavy person has a greater weight (gravitational force) acting on them, which causes them to accelerate at a faster rate than the lighter person. As a result, the heavy person will reach the ground before the lighter person.

Explanation:

Therefore, the heavier person will reach the ground before the lighter person, despite having the same-size parachute.

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To solve this problem, we need to use the principle of moments, which states that the sum of the moments of all the forces acting on an object must be equal to zero if the object is in equilibrium.

First, let's calculate the moment of the weight of the sign about the pin on the beam:

M = Fd
M = 215 N x 3 m
M = 645 Nm

Where F is the weight of the sign and d is the distance from the pin to the center of gravity of the sign.

Next, let's calculate the moment of the tension in the guy wire about the pin on the beam:

M = Fd
M = T x 4 m
M = 4T Nm

Where T is the tension in the guy wire and d is the distance from the pin to the point where the guy wire attaches to the beam.

Since the beam is uniform and in equilibrium, the sum of the moments about the pin must be equal to zero:

M(sign) + M(guy wire) = 0
215 N x 3 m + 4T Nm = 0
T = (215 N x 3 m) / (4 m)
T = 161.25 N

Therefore, the tension in the guy wire is 161.25 N.

Now, let's calculate the horizontal and vertical forces exerted by the pin on the beam:

Vertical force = weight of sign + tension in guy wire
Vertical force = 215 N + 161.25 N
Vertical force = 376.25 N

Horizontal force = 0 (since the beam is in equilibrium and there is no horizontal acceleration)

Therefore, the horizontal force exerted by the pin on the beam is 0 N and the vertical force exerted by the pin on the beam is 376.25 N.
To find the tension in the guy wire and the horizontal and vertical forces exerted by the pin on the beam, we'll need to use the principles of equilibrium for the uniform 135-N beam supporting the 215-N auto repair shop sign.

For equilibrium, the sum of forces in the vertical direction and the sum of forces in the horizontal direction should be equal to zero. Additionally, the sum of the torques (moments) about any point on the beam should also be equal to zero.

First, let's determine the tension (T) in the guy wire:
ΣFy = 0 => Tsin(θ) - 215 N - 135 N = 0
Tsin(θ) = 215 N + 135 N
T = (350 N)/sin(θ)

Next, we'll find the horizontal force (H) exerted by the pin on the beam:
ΣFx = 0 => H - Tcos(θ) = 0
H = Tcos(θ) = [(350 N)/sin(θ)]*cos(θ)

Finally, we'll find the vertical force (V) exerted by the pin on the beam:
ΣFy = 0 => V + Tsin(θ) - 215 N - 135 N = 0
V = 215 N + 135 N - Tsin(θ)

Without specific values for the distances and the angle (θ), we cannot compute the numerical values for T, H, and V. However, you can use these equations to calculate them once you have that information.

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The tension in the guy wire is approximately 149.6 N. The horizontal force exerted by the pin on the beam is 80.4 N, and the vertical force exerted by the pin on the beam is 169.6 N.

To solve this problem, we can start by considering the equilibrium of forces acting on the beam. The weight of the sign, 215 N, can be considered as a downward force acting at a distance of 1.5 m from the left end of the beam.

We can assume that the beam is in equilibrium, meaning the sum of all horizontal forces and vertical forces acting on it is zero.

Let's denote the tension in the guy wire as T. The horizontal and vertical forces exerted by the pin on the beam can be denoted as H and V, respectively. Since the beam is uniform, we can assume that the center of mass of the beam is at its midpoint.

Using the equilibrium conditions, we can set up the following equations:

Horizontal forces: H - T = 0

Vertical forces: V - 215 N = 0

Taking moments about the left end of the beam, we can set up the equation:

V × 3 m - T × 4.5 m = 0

Solving these equations simultaneously, we find that T ≈ 149.6 N, H ≈ 80.4 N, and V ≈ 169.6 N.
Therefore, the tension in the guy wire is around 149.6 N, while the horizontal force exerted by the pin on the beam is about 80.4 N, and the vertical force is approximately 169.6 N.

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Average number of team members who reached their goal per day = 4.2

Number of team members that reached their goals on Monday = 5

Number of team members that reached their goals on Tuesday = 4

Number of team members that reached their goals on Wednesday = 2

Number of team members that reached their goals on Thursday = 7

Number of team members that reached their goals on Friday = 3

Total number of team members that reached their goals = 5 + 4 + 2 + 7 + 3

Total number of team members that reached their goals = 21

Average number of team members who reached their goal per day = 21/5

Average number of team members who reached their goal per day = 4.2

The number of turns in the secondary coil if the input voltage is 120V and the number of turns for the primary coil has 380 turns is 29 turns.

Consider the number of turns in the primary coil to be N₁. The number of turns in the secondary coil is N₂. The input voltage is considered as V₁ and its value is, V₁=120V. The output voltage is considered as V₂ and its value is, V₂= 9V. Now by using the transformer formula, which relates the number of turns, EMF, and current in both the primary and the secondary coils. N₂/N₁ =V₂/V₁ = I₁/I₂. So, N₂/380= 9/120, N₂= (9×380)/120 =28.5 ≈29turns in the secondary coils.

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Answer:

See below ~

Explanation:

The answers are

Sun

precipitation

run off

evaporation

seapage

condensation

just add for distance

for displacement:

parallel: add if the direction is the same

               subtract  if different

perpendicular:  find the hypothness

distance     displacement

6                    2m north

6                     2m west

10                  5√2m southwest

12                  2√26m nothwest

6                     6m east

7                      5m northeast

14                     10m southeast

21                       15m northwest

Answer:

Actually, the sun goes a bit down, like it's not all the way up as to summer. How I know is that you actually can go online maybe search for some videos and see proof, I don't really know how to explain it.

Explanation:

Reason #1: If you check, go out for 12 hours and see, I think the sun is a little down.

Reason #2:

The earth’s axis is tilted.

From a Brainly user of this question for more info:

The Earth is NOT farther away from the sun in USA Winter, and NOT closer to the sun in USA Summer. In 2021, we will be NEAREST to the sun on January 2, and FARTHEST from the sun on July 5 !

NEAREST to the sun next Saturday.

FARTHEST from the sun next July 5.

Momentum of the 80 kg player is 240 kg⋅m/s (80 kg× 3 m/s).Momentum of the 60 kg player is 180 kg⋅m/s (60 kg×3 m/s).The velocity of the 60 kg player must be -3 m/s.

Momentum is an important concept in physics which describes the physical quantity of a moving body's inertia. It is a vector quantity, meaning it has both a magnitude and a direction. Momentum is equal to the product of mass and velocity, and is measured in kilograms-meters per second (kgm/s). Momentum is conserved in closed systems, meaning that the total momentum of a system will remain the same, regardless of any changes in mass or velocity. Momentum is a very useful tool for understanding the motion of objects, particularly in collisions and impacts.

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