According to the label, what is the estimated cost of running this air conditioner for 3,000hours if electrical energy costs 10 cents per kilowatt-hour?
a.$40
b.$19
8c.$238
d.$300

(a) The mass of the block is 9.45 grams and

(b) the tension is 53.4 N

Given : mass = 4.00 kg and block mass = 12 kg

the coefficient of friction or μ = 0.25

the force can be calculated by ;

(b) F₋ = μmg

F₋ = (0.25)( 12 ) (9.8)

F₋ = 29.4 N

the total force on the block

Fₐ = ma

Fₐ = (12 )(2)

Fₐ = 24 N

F is the applied force

thus Fₐ= F - F₋

F = Fₐ + F₋

F = 24 + 29.4

F = 53.4 N

And now we can calculate the (a) part by ;

(a) F₋ - Fₐ = m₋g - 39.2

m₋g = 53.4 + 39.2

m- = 92.6/9.8

m - = 9.45 g

Thus the mass of the block is 9.45 gram

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True. In GMAW (Gas Metal Arc Welding), the amperage is controlled by adjusting the wire feed speed.

GMAW is a welding process that uses a continuously fed wire electrode to join two pieces of metal together. The wire electrode is fed through a welding gun and is melted by an electric arc, which produces a pool of molten metal that solidifies to form a weld.

The amperage in GMAW is controlled by adjusting the wire feed speed, which is the rate at which the wire electrode is fed through the welding gun. Increasing the wire feed speed increases the amperage, while decreasing the wire feed speed decreases the amperage. This allows the welder to control the heat input and penetration of the weld.

As the wire feed speed increases, so does the amperage, and vice versa.

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Answer:

Explained below

Explanation:

1) The human arm: This is a type of simple machine called "Lever". In this type of machine, the elbow acts as the fulcrum, the palm serves as the load because that's where we place the load we want to carry. While the inner part of the arm which is the inner part of the elbow represents the effort because that is the joint we mover when making use of our arms.

2) Pulleys: An example of this in the human body is the knee cap where the direction of an applied force is changed. Thus means as it is in motion, it alters the direction for which the quadriceps tendon pulls on the tibia.

3) wheel and axle: An example of this in the human body is the lateral rotation of the shoulder joint medial. The humerus which is the bone between the shoulder and elbow will act as the axle while the rotator will be the will because when it is rotated a little bit, the humerus will move along with it.

The given statement is true ultrasonic cleaners are based on the same principle as echolocation in bats and some other animals.

A physiological method for identifying far-off or unseen items (like prey) using sound waves that the objects reflect back to the source, such as a bat.

High-frequency sound waves are used in ultrasonic cleaning to scour clean objects that are submerged using liquid as a medium.

The cavitation of the solution's molecules is brought on by the high-frequency sound waves, which are generally 40 kHz in frequency.

Although bats have developed an advanced kind of echolocation that allows them to travel and find food in the dark, they have vision that is comparable to that of humans.

Bats use high frequency sound pulses emitted through their mouth or nose and listen for the echoes to achieve echolocation.

It is accurate to say that ultrasonic cleaners work on the same principles as creatures like bats and certain others that use echolocation.

Hence the given statement is true.

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Unit Level means assembling the individual components of a tennis ball, such as the felt and rubber pieces. Batch Level indicates testing a batch of tennis balls for quality control.

1. Receiving felt shipments - Batch Level: Receiving shipments of felt is a batch-level activity because it involves specific batches of felt that are associated with a particular production run.

2. Cutting felt - Unit Level: Cutting felt is a unit-level activity because it involves cutting individual pieces of felt for use in the production process.

3. Forming rubber cores - Unit Level: Forming rubber cores is a unit-level activity because it involves creating individual pieces of rubber for use in the production process.

4. Reducing electricity usage - Facility Level: Reducing electricity usage is a facility-level activity because it involves the entire facility, not just the production of tennis balls.

5. Calibrating machines - Facility Level: Calibrating machines is a facility-level activity because it involves ensuring that all of the machines in the facility are operating correctly and efficiently.

6. Planning production - Facility Level: Planning production is a facility-level activity because it involves determining how the facility will operate in order to meet production goals.

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complete question: Classify each of the following activities as unit level, batch level, product level, or facility level for a manufacturer of tennis balls. Activity level: 1. Receiving felt shipments 2. Cutting felt 3. Forming rubber cores 4. Reducing electricity usage 5. Calibrating machines 6. Planning production.

Answer:

Propagation of Sound Waves:

Sound waves move (propagate) through a medium by means of particle-to-particle interaction. The source disturbs the immediately surrounding particles, causing them to vibrate about their fixed position at the same frequency as the source.

Elastic potential energy is initially at rest, making it move.

Elastic potential energy is what causes a ball to bounce or rebound because it is transformed into kinetic energy and used to raise the ball back up. However, because some of the ball's energy was transferred to the ground or changed into sound (in the noise it makes upon impact) and heat energy, the ball won't go as high as it did at first (friction with the table). Additionally, even though we cannot see it, the ball alters once it strikes the ground or a table, energy is needed to take shape for a brief period of time.

Because of this, each bounce has a slightly lower height than the one before it. The ball has some kinetic energy when it hits the floor, but some of it is changed, so it loses some of it each time it bounces. After a few bounces, the ball has so little kinetic energy remaining that it stops bouncing.

Thus the correct answer is option A.

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The total amount of water vapor in the atmosphere remains approximately the same over time.

The water cycle shows the continuous movement of water within the Earth and atmosphere. It is a complex system that includes many different processes. Liquid water evaporates into water vapor, condenses to form clouds, and precipitates back to earth in the form of rain and snow. Water in different phases moves through the atmosphere (transportation). Liquid water flows across land (runoff), into the ground (infiltration and percolation), and through the ground (groundwater). Groundwater moves into plants (plant uptake) and evaporates from plants into the atmosphere (transpiration). Solid ice and snow can turn directly into gas (sublimation). The opposite can also take place when water vapor becomes solid (deposition).

In conclusion, water continually evaporates, condenses, and precipitates, and on a global basis, evaporation approximately equals precipitation. Because of this equality, the total amount of water vapor in the atmosphere remains approximately the same over time.

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An existing surface low-pressure system would probably stay stagnant or diminish due to the lack of support from upper-level dynamics if there was no divergence or convergence in the upper troposphere.

On the other hand, sea-level pressures rise in areas of convergence in the upper atmosphere. Surface high-pressure systems are often characterized by calm, largely clear weather due to the ensuing low-level divergence and sinking air.

The pressure systems traveling along the surface are enhanced or suppressed by this convergence and divergence. The air density above, for instance, will decrease when there is a region of diverging air in the upper troposphere.

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The driving force for heat transfer through physical contact between two objects is determined by: The temperature gradient between the objects.

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Answer:

“The only true wisdom is in knowing you know nothing.” ― Socrates. Socrates had it right. Remain humble and appreciate the fact that you don't know everything. ... Thankfully, one's search for knowledge has no end as there is always something new to learn, giving one's life meaning and purpose.

Explanation:

Answer:

knowing wisdom cool

Explanation:

lol

The magnitude of the acceleration is  −0.50 m/s² of the block of mass 290kg that slides on a frictionless plane inclined at 39◦ with the horizontal under the influence of a restraining force of 1643 .

The resulting motion is

2. up the plane, since the acceleration is negative.

Acceleration describes the speed and direction changes in velocity over time. Acceleration refers to the change in speed or direction of an object or point moving straight ahead.

Due to the constant change in direction, motion on a circle accelerates even when the speed is constant. Both effects help to accelerate all other types of motion.

We have given that,

m = 290 kg

θ = 39◦

F = 1643 N

g = 9.8 m/s²

The force due to gravity

F₁ = m × g × sinθ

F₁ = 290 × 9.8 × sin 39°

F₁ = 1790.46 N

Lets take acceleration is a m/s²

Form Newtons second law

F - F₁ = m × a

1643 - 1790.46 = 290 x a

a = −0.50 m/s²

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its a solid from the pressure they put on a tennis ball would make it full of moving at fast speed matter bites compacted together but still moving.

A circuit diagram is a graphical representation of an electrical circuit, showing the components and their connections using standardized symbols to convey the circuit's function and operation.

A) In order to assign a separate current for each leg of the circuit and identify the number of circuit paths, it is important to first draw out the circuit diagram. Once the diagram is drawn, a separate current can be assigned to each leg and indicated on the diagram. The number of circuit paths or loops can be determined by following the current flow and identifying any branches or loops in the circuit. These loops can then be labeled on the diagram.

B) To analyze a circuit, conservation of current is applied at each junction and conservation of energy is used to determine the potential differences across all elements. The direction of potential difference should be noted, and Ohm's law can be used to calculate resistor potential difference. Equations must match the number of unknowns in the circuit.

C) After completing the calculations and obtaining linear equations, they should be simplified as much as possible. Formulas to calculate the current through each resistor in Circuit XIII can be derived by considering the voltage of the batteries and resistances in the circuit. Ohm's law can be used to calculate the current through each resistor, where current equals voltage divided by resistance.

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Answer:

Light

Explanation:

Light is the form of energy which enables us to see any object.

Answer:

x = 10

Explanation:

One of the properties of a rhombus is that the diagonals bisect each other at 90°

This means AC and BD are perpendicular to each other.

Let us call this intersection point as O

Then AOC forms a triangle with angles 3x - 13, 8x-7 and 90°

Since the sum of 3 angles of a triangle = 180°

(3x - 13) + (8x-7) + 90 = 180

(3x - 13) + (8x-7) = 180 - 90

(3x - 13) + (8x-7)  = 90

3x - 13 + 8x - 7 = 90

3x + 8x - 13 - 7 = 90

11x - 20 = 90

11x = 90 + 20 = 110

x = 10

Hi there!

We know the equation:

W = F · d, where:

F = force (N)

d = displacement (m)

W = work (J)

Rearrange to solve for distance:

W/F = d

Plug in the given values:

75/5 = 15 m

Answer:

0.4329 seconds

Explanation:

We are given;

Distance; d = 0.635 m

Velocity; v = 3.22 m/s

Angle; θ = 62.9°

To find the time, we have to find the horizontal component of the velocity.

Thus, Vx = 3.22 × cos 62.9

Formula for time is;

t = d/Vx

t = 0.635/(3.22 × cos 62.9)

t = 0.4329 sec

Thus the time he will take to clear the hurdle is 0.4329 sec

The true statements are:Jupiter's Great Red Spot is in the southern hemisphere.The fastest wind speed recorded in our solar system is on Neptune.

Among the given statements, only two are true. Jupiter's Great Red Spot, a massive storm, is indeed located in the southern hemisphere of the planet. The Great Red Spot is a prominent feature on Jupiter, visible as a giant swirling storm system. On the other hand, the fastest wind speed recorded in our solar system, reaching speeds of up to 2,100 kilometers per hour (1,300 miles per hour), is found on Neptune.

The strong winds on Neptune contribute to its dynamic atmosphere and the formation of features like the Great Dark Spot. The remaining statements about Pluto, Saturn's moon Enceladus, and Uranus are not true according to our current understanding.

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Answer:

104 highest and 96 the lowest

Explanation:

it has an uncertainness of 4%Meaning 104%on the highest and 96 on the lowest

Answer:

1 x 10 -10 whisper at 1m distance.

Explanation:

Answer:

The change in intensity is 63%.

Explanation:

intensity level = 18 db

Let the intensity is I.

Io = 10^(-12) W/m^2

Use the formula of intensity

\(dB = 10 log\left ( \frac{I}{Io} \right )\\\\18 = 10 log\left ( \frac{I}{Io} \right )\\\\1.8 = log\left ( \frac{I}{Io} \right )\\\\\left ( \frac{I}{Io} \right )=63.1\)

So, the change in intensity is 63%.

Answer:

B

Explanation:

when you put it on a smooth surface and they're both at the same level it'll determine which one is faster and which one has less Mass. hope this helps much love .

There are no smart people available at the moment, but I'll try and help you.

Do the SECOND choice on the list. Keep the forces of the push on both blocks exactly equal. The block that jumps out ahead has less mass. The block that lags behind has more mass.

The axial resistance of an axon is calculated using the formula R = ρL/A, where ρ is the resistivity, L is the length, and A is the cross-sectional area. In this case, the axial resistance is 11.28 MΩ.

The resistance along the axon is calculated using the following formula:

R = ρL/A

where:

R is the resistance in ohms

ρ is the resistivity in ohms per meter

L is the length in meters

A is the cross-sectional area in meters squared

In this case, we have:

ρ = 1.6 x 107 Ω.m

L = 0.5 mm = 0.0005 m

A = πr² = π(5 x 10-6)² = 7.854 x 10-13 m²

Therefore, the resistance is:

R = ρL/A = (1.6 x 107 Ω.m)(0.0005 m) / (7.854 x 10-13 m²) = 11.28 MΩ

Therefore, the axial resistance of the axon is 11.28 MΩ.

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The rock's speed just before impact is 49 m/s and it will be the maximum speed of the rock.

The velocity of the rock before the impact is the final velocity of the rock and it depends on the initial velocity of the rock, time of motion and acceleration due to gravity.

The speed of the rock before the impact is calculated as follows;

v = u + at

where;

Substitute the given parameters and solve for the final velocity.

v = 0 + 9.8 m/s² x 5 s

v = 49 m/s

Thus, the rock's speed just before impact is 49 m/s and it will be the maximum speed of the rock.

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According to Newton's laws of motion and the principle of conservation of energy, using the variables v, H, D, and t we have;

\( (a)\: H = \frac{1}{2} \cdot g\cdot {t}^{2} \)

\(v = \frac{D}{t} \)

\( (b)\: D = v \times \sqrt{\frac{2\cdot H}{g}} \)

(c) The velocity must be doubled

(d) The height, H, must be multiplied by 4

(e) F = m•g

(f) K.E. = m•g•H

Mass of the object = m

Initial (horizontal) velocity of the object = v

Initial height = H

Horizontal distance traveled = D

Time object is a projectile = t

(a) According to Newton's laws of motion, we have;

\(H = \frac{1}{2} \cdot g\cdot {t}^{2} \)

\(v = \frac{D}{t} \)

Where;

g = Acceleration due to gravity

(b) From the two equations above, we have;

\(t = \frac{D}{v} \)

Which gives;

\(H = \frac{1}{2} \cdot g\cdot { \left( \frac{D}{v} \right ) }^{2} \)

\( D = v \times \sqrt{\frac{2\cdot H}{g}} \)

(c) From the equation in part b, we have that the horizontal distance, D, is directly proportional to the horizontal velocity, v, therefore;

(d) Given that the velocity remains constant, and multiplying both sides of the equation in part b by 2 gives;

\( 2 \times D = 2 \times v \times \sqrt{\frac{2\cdot H}{g}} = v \times \sqrt{\frac{2\cdot 4 \times H}{g}} \)

Therefore;

(e) The net force, F, acting on the object is the force of gravity, which is given by the equation;

(f) Just before the object strikes the ground, according to the law of conservation of energy, we have;

Kinetic energy, K.E. = Initial potential energy of the object at the top

Therefore;

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The relationship between the speed and height of the three balls is that; each ball will have the same speed.

What is the relationship between speed and height?

We are given that;

Three balls are thrown from a cliff with same speed

Ball A is thrown in the horizontal direction.

Ball B starts out at 45° above the horizontal.

Ball C begins its flight at 45° below the horizontal

From law of conservation of energy, we know that potential energy is equal to kinetic energy. Thus;

mgh = ¹/₂mv²

v = √2gh

Therefore, the speed is directly proportional to the height and as such since the three balls have the same height, their speeds will be the same.

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[NOTE : THIS IS AN INCOMPLETE QUESTION. THE COMPLETE QUESTION IS:

Three balls are thrown off a cliff with the same speed but in different directions. Ball A is thrown in the horizontal direction; ball B starts out at 45° above the horizontal; ball C begins its flight at 45° below the horizontal. Which ball has the greatest speed just before it hits the ground? Assume that the ground near the building is level, and ignore any effects due to air resistance.]

Explanation:

V=u+at

a=v-u) /t

A=5-20)10

a=15/10

a=1.5ms^2

If a truck begins with a velocity of 20. meters per second east and changes its velocity to 5.0 meters per second east in 10.0 seconds, then the truck's rate of acceleration would be  1.5 meters / second².

The rate of change of the velocity with respect to time is known as the acceleration of the object. Generally, the unit of acceleration is considered as meter/seconds².

As given in the problem If a truck begins with a velocity of 20. meters per second east and changes its velocity to 5.0 meters per second east in 10.0 seconds,

The initial velocity of the truck = 20. meters per second

The final velocity of the truck =  5.0 meters per second

Time period = 10.0 seconds

By using the first equation of the motion,

v = u + at

5= 20+ 10a

a = 20-5/-10

a = -1.5 meters / second²

Thus, the acceleration of the truck would be -1.5 meters / second².

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Answer:

30 years old

Explanation:

The  reaction forces are as follows:

Reaction forces are the force which act in an opposite direction to an applied force.

According to Newton's third law of motion, action and reaction are equal but oppositely-directed.

Considering the given forces, the reaction forces are as follows:

A baseball bat hits a ball = the reaction force is that of the ball hitting the bat

A bowling ball pushes up against the pins = the pins pushing against the bowling ball

Air particles push outward against a balloon = the walls of the balloon pushing against the air particles

During an earthquake, tectonic plates move = the weight of the tectonic plates.

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Answer:

Caused by gravity and the roller coaster's position, the potential energy is stored in the roller coaster. For example, this ball is at the top of a hill, where potential energy is at it's highest.

Explanation: