An object is moving with uniform speed in a circle of radius r. Calculate the distance and displacement
(a) When it completes half the circle,
(b) When it completes full circle,
(c) What type of motion does the object possess ?

Answer:

Answer:

8 oz

Explanation:

EAC( Low-energy lightbulb )=18.47 EAC( Conventional lightbulb )=7.33 Conventional lightbulb is cheaper to operate. Option D

To calculate the Equivalent Annual Costs (EAC), we need to consider the initial cost, maintenance costs, and the present value of future costs, taking into account the discount rate.

The EAC (Equivalent Annual Cost) is calculated by summing up the annual costs of the lightbulb over its lifetime, discounted at the real discount rate of 4%.

For the low-energy lightbulb:

EAC = Cost of bulb + Present value of annual electricity cost

= $3.60 + ($2.00 / (1 + 0.04)^1) + ($2.00 / (1 + 0.04)^2) + ... + ($2.00 / (1 + 0.04)^9)

≈ $18.47

For the conventional lightbulb:

EAC = Cost of bulb + Present value of annual electricity cost

= $0.60 + ($7.00 / (1 + 0.04)^1) + ($7.00 / (1 + 0.04)^2) + ... + ($7.00 / (1 + 0.04)^1)

≈ $7.33

Since the EAC for the low-energy lightbulb is $18.47 per year and the EAC for the conventional lightbulb is $7.33 per year, the conventional lightbulb is cheaper to operate assuming a burnt-out bulb is replaced by an identical bulb.

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The theory that some researchers use to suggest that standard-sized galaxies are actually two or more dwarf galaxies that have been merged together is the cannibalism theory.

The cannibalism theory proposes that galaxies grow larger by consuming smaller galaxies. Researchers suggest that some standard-sized galaxies are actually the result of the merger of two or more dwarf galaxies.

Therefore, the cannibalism theory is used to explain the formation of some standard-sized galaxies by the merger of smaller galaxies.

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Answer:

Derived units are derived from these 7 base units. Derived units are dependent on the base units and are not independent of each other. ... Mass has SI units of kg, distance is measured in m and t has the SI unit of second. Thus, SI unit of force is kg.

The velocity vector is always perpendicular to the radius. By radius, I mean the inward centripetal force that pulls the object to continue on its curved path. Without this inward force, the object would continue on a straight path tangential to the curve it was previously on.

Answer:

Final position: 75m

Explanation:

Just multiply 30 by 2.5

Answer:

KE = 1/2 M v^2       kinetic energy of projectile

KE = 1/2 * 20 * (54 m/s)^2 = work done on projectile

W = 10 * 54^2 = work done on projectile

W = 29,160 J

To start the magnetic field

Answer:

A)  R = F1 + F2

B) R = | F1 - F2 |

Explanation:

A) For forces acting in the same direction

we will add up the forces : lets assume the forces to be F1 , F2

Then the magnitude of the forces acting in the same direction will be

R = F1 + F2

B) For forces acting in the opposite direction

we will subtract the forces i.e. stronger force - weaker force . assuming the forces to be F1 , F2

Hence the magnitude of the resultant force = R = | F1 - F2 |

Answer:

hhjjj

Explanation:

j

Answer:

this is a difficult question but I will try to answer it answer for this is 3220 a + b b u s y d l new

The clause that is used to group the output of a stats command by a specific name is called the by clause.

This clause allows you to group your data by one or more fields, which can be specified after the "by" keyword. The resulting output will show the values of the specified fields along with the results of the stats command.
For example, if you want to group your data by a field called "product", you would use the "by product" clause in your stats command. This would group the output by the product field and show the results of your stats command for each product.
Using the "by" clause can be helpful when you want to analyze your data based on specific groups or categories. It allows you to see the results of your stats command broken down by those categories, which can give you a more detailed understanding of your data.
In summary, the "by" clause is a powerful tool that can be used in conjunction with the stats command to group your data by specific fields. This can provide valuable insights into your data and help you make more informed decisions.
The clause you are referring to is the "GROUP BY" clause. It is used in conjunction with the "stats" command (or similar aggregate functions) to organize the output based on a specific column or attribute name. This allows for easier analysis and interpretation of the data by grouping similar items together and summarizing their corresponding values. The "GROUP BY" clause is a crucial element in database management systems and data processing tasks, as it enables users to obtain meaningful insights from large datasets in a structured and efficient manner.

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Fluid clutches are used on equipment that is subject to frequent stopping.

Fluid couplings are used in various equipment in which the rotational torque must be transferred smoothly and without shock from the motor to the driven machine.

They are characterized by high transmittable torque and power, quick response times, and a good damping effect.

It absorbs and smooths torsional vibrations from the driveshaft, resulting in a longer lifespan of the drive components.

Equipment that is subject to frequent stopping.

For equipment that is subject to frequent stopping, fluid clutches are commonly used.

This is due to the fact that fluid clutches may be started and stopped frequently without causing harm or wear to the machine.

For this reason, fluid clutches are commonly used in machinery that needs a smooth start and stop, which is important to avoid any harm to the machinery.

In addition, fluid clutches are also less likely to slip, making them ideal for continuous running machines.

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Fluid clutches are used on equipment that is subject to frequent stopping. The correct answer is option C.

A fluid clutch is a type of mechanical device that transmits torque and rotational power from one shaft to another via a fluid.

Fluid clutches are used to couple two rotating shafts and control the amount of torque transferred between them.

Fluid clutches are used in many types of industrial machinery, including printing presses, machine tools, and pumps, as well as in cars and other vehicles.

These clutches can handle higher torque and power loads than most other types of clutches, making them well suited for heavy-duty applications.  

They are most commonly used on equipment that is subject to frequent stopping, such as industrial machines and vehicles, but can also be used on equipment that is subject to other forms of stress, such as misalignment and continuous running. So, the correct answer is option C.

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The radius of curvature of the A-36 steel beam is approximately 0.463 inches.

The radius of curvature of the beam can be determined using the formula for stress and curvature relationship in beams.

Given:
Depth of the beam (d) = 10 inches
Stress at the outer fibers (σ) = 36 ksi (kips per square inch)

To find the radius of curvature (R), we can use the following formula:

R = (d^2) / (6σ)

Substituting the given values:

R = (10^2) / (6 * 36)

R = 100 / 216

R ≈ 0.463 inches

Therefore, the radius of curvature of the A-36 steel beam is approximately 0.463 inches.

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The sled travels 21.5 meters before coming to a stop.

The coefficient of friction measures the amount of friction between two surfaces. Calculating the resistance to motion at the interface of two surfaces of similar or different materials is what a coefficient of friction is. COF (coefficient of friction) is a dimensionless quantity defined as the ratio of friction force to normal force (Eqn (2.1)). Lubricous materials have a coefficient of friction (COF) less than 0.1.

Here,

coefficient of kinetic friction=0.13

u=7.4 m/s

g=9.8 m/s²

a=coefficient of kinetic friction*g

=0.13*9.8

a=-1.274 m/s²

v=0

v²=u²+2as

0=7.4²-2*1.274*s

0=54.76-2.548s

s=54.76/2.548

s=21.5 m

The distance the sled moves before coming to rest is 21.5 m.

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The question addresses the stability of the atmosphere and the factors that determine convective stability or instability. It also explains the difference between the adiabatic lapse rate of dry air and wet saturated air.

a) The stability of the atmosphere is determined by the temperature profile and relative densities of the air cell and atmosphere. If the temperature of the surrounding atmosphere decreases with altitude at a rate greater than the adiabatic lapse rate of the air cell, the atmosphere is considered convectively stable.

In this case, the air cell will return to its original position. Conversely, if the temperature of the surrounding atmosphere decreases slower than the adiabatic lapse rate of the air cell, the atmosphere is convectively unstable. The air cell will continue moving in the same direction.

b) The adiabatic lapse rate refers to the rate at which temperature decreases with altitude for a parcel of air lifted or descending adiabatically (without exchanging heat with its surroundings). The adiabatic lapse rate of dry air is higher (around \(9.8^0C\) per kilometer) compared to the adiabatic lapse rate of wet saturated air (around 5°C per kilometer).

This difference arises because when water vapor condenses during the ascent of saturated air, latent heat is released, reducing the rate of temperature decrease. A diagram can illustrate the difference between the two lapse rates, showcasing their respective slopes.

c) When wet unsaturated air rises from the ocean surface, its temperature decreases at a rate equal to the dry adiabatic lapse rate. However, if the ambient lapse rate (temperature decrease with altitude) is higher than the adiabatic lapse rate for dry air, a temperature inversion layer forms at higher altitudes.

In this inversion layer, the temperature increases with altitude instead of decreasing. A schematic diagram can depict the temperature changes of the wet air in comparison to the ambient temperature, showing the inversion layer.

Cumulus clouds form at the altitude where the rising moist air reaches the level of the temperature inversion layer. These clouds are formed due to the condensation of water vapor as the air parcel cools to its dew point temperature.

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(1) 2i j−2k can be expressed as 2√2 units in the direction of i j−k.

(2) 9i−2j can be expressed as √85 units in the direction of 9i−2j.

(3) 6k can be expressed as 6 units in the direction of k.

(4) 5k can be expressed as 5 units in the direction of k.

(5) 35i can be expressed as 35 units in the direction of i.

(6) 45k can be expressed as 45 units in the direction of k.

(7) 16i−16j−16k can be expressed as 16√3 units in the direction of i−j−k.

The answer provided expresses each vector as a product of its length and direction. For each vector, the magnitude (length) is given as a numerical value, and the direction is expressed using the respective unit vectors (i, j, k).

The magnitude represents the scalar part of the vector, while the direction indicates the orientation or the combination of coordinate axes along which the vector extends.

By decomposing the given vectors into their scalar components and unit vectors, we can express them as products of length (magnitude) and direction.

This notation allows us to represent vectors in a concise and standardized format, providing information about both the size and orientation of the vector in three-dimensional space.

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Answer: C, E, and D is incorrect

Explanation:

C is wrong because the arrows are going inside but they should be negative not positive. E is wrong because it should be positive not negative since the arrows are going outward. D is wrong because there are more arrows in the right side instead it is suppose to be on all sideS

Answer:

T = 14.7 N

Explanation:

When released the two blocks will accelerate

See diagram below  (hope it is not too confusing or unclear)

Answer:

Batteries are intended to store chemical energy and then it converts into electricidal energy. So overall, batteries produce energy.

Explanation:

1/Rt = 1/R1 + 1/ R2 ......n.....

1/Rt= 1/5ohm + 1/10ohm + 1/15ohm +1/20ohm

1/Rt= 12ohm + 6ohm + 4ohm +3ohm

60.

1/Rt = 25 ohm

60

Rt= 60

25

Rt= 2.4 ohm.

note: Rt is equivalent resistance.

Answer:

An aeroplane is flying with the velocity of V_(1)=800kmph relative to the air towards south.A wind with velocity of V_(2)=15ms^(-1) is blowing from west to east.What is the velocity of the aeroplane with respect of the earth.

Answer:

450 kg

Explanation:

In the picture above. Goodluck

Answer:

The correct answer is D :)

Explanation:

Got it right edge 2021

The main answer is:The volume of water displacement of the floating oil rig is 339,394 cubic feet.Explanation:A floating oil rig is anchored in the seabed with cables giving a net pull of 2,250,000 lbf down. Here is how to determine how large a water displacement volume that leads to:

Let us recall the principle of Archimedes: It states that "when an object is fully or partially immersed in a liquid, it experiences an upward force that is equal to the weight of the liquid displaced."The upward force exerted on the floating oil rig is equal to the weight of the water displaced by it, which can be determined using the following formula:Upward force = Weight of water displacedThe formula for the weight of water displaced is:Weight of water displaced = Volume of water displaced × Density of waterwhere

:Volume of water displaced = VDensity of water = ρWe know that the upward force exerted on the oil rig is equal to the net pull of the cables, which is 2,250,000 lbf down. This is also the weight of the oil rig. Therefore, we can say that:Upward force = Weight of water displaced2,250,000 lbf = V × ρ × gwhere:g = acceleration due to gravity = 32.2 ft/s² (this is the value used in the United States)ρ = density of water = 62.4 lb/ft³ (this is the value used in the United States)Solving for V:V = 2,250,000 lbf / (ρ × g)V = 2,250,000 lbf / (62.4 lb/ft³ × 32.2 ft/s²)V ≈ 339,394 ft³Therefore, the volume of water displaced by the floating oil rig is 339,394 cubic feet.

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The substance that is the best transmitter of solar energy is glass.

Solar energy is an effective and renewable energy source that is harnessed in a variety of ways. In order to utilize solar energy in the most efficient way possible, it is necessary to determine which substance is the best transmitter of this energy. Among all substances, glass is the best transmitter of solar energy. Glass is transparent, which means that it allows sunlight to pass through it. In fact, it transmits about 90% of the sunlight that falls on it. Glass also traps the remaining heat, which is why it is an ideal material for greenhouses and solar panels. A greenhouse is a structure that is built with glass walls and roofs in order to grow plants. The glass walls and roofs trap the sunlight, which heats up the inside of the greenhouse. This allows plants to grow in a controlled environment that is not affected by changes in the weather. A solar panel is a device that converts sunlight into electrical energy. The solar panel is made up of photovoltaic cells, which are made of silicon and other materials that absorb sunlight. When the sunlight is absorbed by the photovoltaic cells, it creates an electric current that can be used to power a variety of devices.

In conclusion, glass is the best transmitter of solar energy. It transmits about 90% of the sunlight that falls on it and traps the remaining heat, making it an ideal material for greenhouses and solar panels. By using glass, we can harness the power of the sun in a variety of ways that are efficient, effective, and environmentally friendly.

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Answer:

1) The Newton's law the Hulk is most closely demonstrating is the Third Law of motion

Newton's third law of motion states that action and reaction are equal and opposite.

2) The reason why the Newton's Law the Hulk is most closely demonstrating is the Newton's Third Law of Motion is that according to Newton's Third Law of motion, forces exist in pairs, the action of the Hulk when he leaps upward by pushing against the the Earth (which can be assumed stationary in relation to the Hulk), is equal to the reaction of the Earth, which moves down slightly, away from its initial position.

However, due to the large mass of the Earth, compared to the mass of the Hulk, the downward motion of the Earth due to the reaction force (equal to the force with which the Hulk leaps) is negligibly small, such that the Earth can absorb the Hulk's leap force by reacting mainly locally, at the leap point  by forming a crater, while the Earth in general, remains in the same place

Explanation:

Ans. 4 m/s2

we know that,

acceleration = change in velocity/ total time

putting values we get,

16-2/3.5

= 14/3.5

=4

thus, the car's acceleration = 4 m/s2

Answer:

The amount of charge increases.

Explanation:

For a capacitor that has its plates still connected to a battery, the voltage on the capacitor remains constant. If the distance between the two plates of this capacitor is decreased, the capacitance will increase, and then the charge on the plate will increase in accordance with the relationship

Q =CV

From this relationship, if V is held constant, then Q has to increase for C to increase also.