A ferris wheel starts at rest and builds up to a final angular speed of 0. 70 rad/s while rotating through an angular displacement of 2. 5 rad. What is its average angular acceleration?.

Silver has a density of 10.5 g/ [tex]cm^3[/tex] and gold has a density of 19.3 g/ [tex]cm^3[/tex], so out of 5  [tex]cm^3[/tex] of silver or 5  [tex]cm^3[/tex] of gold, the 5  [tex]cm^3[/tex] of gold would have a greater mass as the mass of gold is 96.5 g while the mass of silver is 52.5 g.

The mass of an object is equal to its density multiplied by its volume, so here is the calculation,

For 5 [tex]cm^3[/tex] of silver, the mass is,

mass = density x volume

mass = 10.5 g/ [tex]cm^3[/tex]x 5 [tex]cm^3[/tex]= 52.5 g

For 5  [tex]cm^3[/tex] of gold, the mass is

mass = density x volume

mass = 19.3 g/ [tex]cm^3[/tex]x 5  [tex]cm^3[/tex]

mass = 96.5 g

Hence, silver has a density of 10.5 g/ [tex]cm^3[/tex] and gold has a density of 19.3 g/ [tex]cm^3[/tex], so out of 5  [tex]cm^3[/tex] of silver or 5  [tex]cm^3[/tex] of gold, the 5  [tex]cm^3[/tex] of gold would have a greater mass as the mass of gold is 96.5 g while the mass of silver is 52.5 g.

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Answer:

Below

Explanation:

The ball has one second to fall from its height and to travel horizontally at 15 m/s

Rate X Time = distance       15 m/s * 1 s   = 15 meters from the platform .

df = do + vot + 1/2 a t^2

  df = final position = o ft ( on the ground)

  do = initial position = height

     vo = original vertical velocity = 0

         a = - 9.81 ms^2

so you have this:

  0 = height + 1/2 (- 9.81)  m/s^2 * (1)^2

       height = 4.9 meters

Answer: force

Explanation:

It has 10,000 joules of potential energy.

Potential energy is the energy stored in an object due to its position or configuration. This type of energy is due to the force of gravity and is determined by the mass of the object, the height it is raised, and the acceleration due to gravity.

In this case, the object has a mass of 20 kilograms and is raised by 10 meters. The acceleration due to gravity is 9.8 m/s2. When the object is raised, it gains 10,000 joules of potential energy, which can be calculated using the equation: PE = mgh, where m is the mass of the object, g is the acceleration due to gravity, and h is the height the object is raised. Thus, in this example, PE = (20 kg)(9.8 m/s2)(10 m) = 19,600 joules.

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A neutral atom in the gas phase needs a certain amount of energy to have its electron removed before it may become ionized. This atom might be ionized by electromagnetic radiation with a maximum wavelength of [tex]8.06 \times 10^{-7} m[/tex]

Using the formula [tex]\lambda = \frac{hc}{E}[/tex], where h is Planck's constant [tex](6.62 \times 10^{-34} J s^{-1} )[/tex] c is the speed of light [tex](2.998 \times 108 \frac{m}{s})[/tex] And is the wavelength of the electromagnetic radiation, one may determine the largest wavelength of electromagnetic radiation that could ionize this atom.

We can determine the largest wavelength that can produce the ionization energy by rearranging the equation. Microwaves have the longest wavelength and the lowest frequency of the electromagnetic waves mentioned.

[tex]\lambda = \frac{hc}{E} = (6.62 \times 10^{-34} Js^{-1} ) \times (2.998 \times 10^{8} m/s) / (6.24 \times 10^{-19} J) = 8.06 \times 10^{-7} m[/tex]

Therefore, The longest wavelength of electromagnetic energy that may ionize this atom is, hence, [tex]8.06 \times 10^{-7} m.[/tex]

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The rank of the strain on each of these wires from least to greatest is A C B (second option).

The strain on each wire can be calculated using the formula:

strain = (change in length) / (original length)

Using this formula, we can calculate the strain for each wire:

A: strain = (244 - 235) / 235 = 0.0383

B: strain = (380 - 342) / 342 = 0.1111

C: strain = (198 - 185) / 185 = 0.0703

Therefore, the strains on the wires, ranked from least to greatest, are:

A (0.0383), C (0.0703), B (0.1111)

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Answer:

झझकोर देने की कोशिश की है और यह बात उस समय की है जब कुंवर जी के लिए एक ही है कि वह इस बात को भी नहीं

The calibration nut on a bimetallic stemmed thermometer is used for:  determining if the product's temperature has exceeded safe limits during shipment or subsequent storage.

Bimetallic stemmed thermometer can check temperatures from 0˚F to 220˚F (–18˚C to 104˚C) and this thermometer measures temperature through its metal stem. When checking the temperature, insert the stem into the food up to dimple.

Bimetal thermometers work on the principle that different metals expand at different rates as they get heated. By using two strips of different metals in thermometer, movement of the strips correlates to the temperature and can be indicated along scale.

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Cold fronts bring cooler weather, clearing skies and sharp change in wind direction.

In the winter, cold fronts bring cold spells and sometimes snow. In the spring or summer, in temperate latitudes, hail may fall along with the rain. If moisture is not sufficient, such as when the system has previously moved across the mountain barrier, then cold fronts can pass without cloudiness.

Cold front is generally associated with stormy weather. Cold front often brings intense weather changes such as thunderstorms whereas a warm front brings light rain or drizzle.

With cold front, cold air advances and displaces warm air as cold air is more dense than warm air.

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1. After 10 iterations, we would have:

f^10(1) = 2^10•1 = 1024

2. The value of f^n(-1) will become more and more negative without bound.

1. As the number of iterations grows, the numbers will grow at an exponential rate. Specifically, each iteration doubles the value of the previous iteration. So after 10 iterations, we would have:

f^10(1) = 2^10•1 = 1024

2. If we repeat the process with an initial value of -1, we get:

• f(-1) = 2•(-1) = -2

• f²(-1) = 2•(-2) = -4

• f³(-1) = 2•(-4) = -8

We can see that the numbers are becoming increasingly negative as the iterations progress. In fact, we can prove that the function will approach negative infinity as the number of iterations grows. To see this, we can use the formula for the nth iteration of f:

f^n(-1) = 2^n•(-1)

As n gets larger and larger, 2^n grows at an exponential rate, while (-1) remains constant. Since the exponential growth dominates, the value of f^n(-1) will become more and more negative without bound.

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Answer:

D

Explanation:

At 66.5 degrees north of the equator, the sun's rays will be less direct ( the sun will not be as high in the sky)

The student should avoid using light in the range of 550 nm to 600 nm in their experiment because these are the wavelengths of light that are typically absorbed by chlorophylls in green plants, and the chloroplasts that were used in the experiment lacked pigments that absorb in this range. Here option B is the correct answer.

To measure the activity of the chloroplasts at different wavelengths, the student needs to use a broad range of light wavelengths and avoid using a specific wavelength of light that the chloroplasts cannot absorb.

Of the options given, red light (which has a wavelength range of 620 nm to 750 nm) would be the best choice to avoid in the experiment. This is because red light is absorbed strongly by chlorophyll a and b, which are the primary pigments involved in photosynthesis, and it may interfere with the measurement of activity at other wavelengths.

On the other hand, blue, orange, yellow, and violet light are not strongly absorbed by chlorophylls and can be used in the experiment to measure activity at different wavelengths.

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If you are told that a 20 kilogram object is raised by 10 meters then the mass of the object is 20 kilograms.

What is force of gravity?

Force of gravity is the attractive force between two objects that is due to their masses. It is what causes objects to fall to the ground when dropped and what keeps planets in their orbits. The strength of the gravitational force between two objects depends on their masses and the distance between them. The force of gravity is an inverse square law, meaning that if the distance between two objects is doubled, the force of gravity between them will be one-fourth of what it was originally.

The mass of an object is a measure of the amount of matter it contains and is not affected by changes in its position or location. Therefore, the mass of the object remains the same regardless of how high it is raised. In this case, the mass of the object is 20 kilograms.

Therefore, mass of the object is 20 kilograms is the correct answer.

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Answer:

850$

Explanation:

thats the answer

The distance covered by the runner in 5 seconds can be estimated to be 108 meters, using Simpson's rule.

Distance is a measure of the amount of space between two objects or points. It can be measured in a variety of ways, including linear, angular, and temporal distance. Distance is an important concept in physics, mathematics, and other sciences. It is used to describe the magnitude of physical phenomena, such as the speed of light or the force of gravity. It can also be used to measure the distance between two points in space or between two points in time. Distance is also used in everyday life to describe the amount of separation between two people or locations.

Simpson's rule is a numerical integration method used to approximate the definite integral of a function. It is based on the idea that the integral of a function can be approximated by dividing it into a series of trapezoids and evaluating the area of each trapezoid. To use Simpson's rule to calculate the distance covered by a runner in 5 seconds, we need to calculate the area under the curve of the speed-time graph.

The first step is to calculate the area of the trapezoids. We can do this by taking the average of the two endpoints of each trapezoid and multiplying it by the width of the trapezoid. The width of each trapezoid is the difference between the x-values of the two endpoints. The area of each trapezoid can be calculated using the following formula:

Area = (Average of the two endpoints) × (width of the trapezoid)

Once the area of each trapezoid is calculated, we can add them all together to get the total area under the curve. This total area is the distance covered by the runner in 5 seconds.

For example, using the data from the table, we can calculate the area of the first trapezoid as follows:

Area = (8 + 10)/2 × (1) = 9

The total area under the curve is then calculated by adding the areas of all the trapezoids together:

Total area = 9 + 18 + 24 + 27 + 30 = 108

Therefore, the distance covered by the runner in 5 seconds can be estimated to be 108 meters, using Simpson's rule.

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The ratio of the intensity of voice for someone standing in front of the person  to the intensity for someone standing behind is 10:1

Intensity is a physical quantity that measures the amount of energy that flows through a given area per unit of time. In the context of sound waves, intensity refers to the amount of energy carried by sound waves per unit of time and per unit of area. It is related to the amplitude (or height) of the sound waves, which determines how much the pressure varies in the medium through which the waves travel. The unit of intensity is watts per square meter (W/m^2). The intensity of sound waves is important in many applications, such as in measuring the loudness of sounds, determining safe exposure levels to noise, and designing acoustic systems.

The difference in the sound level in decibels (dB) between two positions can be calculated using the following formula:

ΔL = 10 log10(I2/I1)

where ΔL is the difference in dB, I1 is the intensity at the first position, and I2 is the intensity at the second position.

In this case, the sound level is 10 dB higher is known for someone standing directly in front than for someone at the same distance but directly behind you. Using this information to set up the following equation:

10 dB = 10 log10(I_front/I_back)

where I_front is the intensity of voice for someone standing in front and I_back is the intensity of voice for someone standing behind

We can simplify this equation by dividing both sides by 10:

1 dB = log10(I_front/I_back)

Now, raise both sides of the equation to the power of 10:

10^1 = I_front/I_back

Simplifying this expression

I_front/I_back = 10

So the ratio of the intensity of your voice for someone standing in front of you to the intensity for someone standing behind you is 10:1. In other words, your voice is 10 times louder for someone standing directly in front of you than for someone at the same distance but directly behind you.

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An electrocardiogram (ECG) result called ST segment depression suggests a problem with the electrical activity of the heart.

The ECG's ST segment is a section that shows the beginning of ventricular repolarization. The ST segment is typically flat or just slightly raised in healthy people.

Nonetheless, there can be a reduction in blood supply to the heart tissue, for instance during an angina episode or a heart attack, which can result in ST segment depression.

Additional factors that contribute to ST segment melancholy include drug interactions, electrolyte imbalances, and other cardiac problems. Doctors can establish the proper therapy and the underlying reason by looking at the intensity and location of the ST segment depression.

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The dot diagram of an object moving at constant speed to the right is in the diagram uploaded.

Constant speed refers to a situation in which an object moves in such a way that its rate of change of position is the same at all times. This means that the object is covering an equal distance in equal intervals of time.

In other words, it moves with a uniform velocity, meaning that its speed does not change.

For example, if a car is traveling at a constant speed of 60 miles per hour, it covers 60 miles in each hour of its journey, regardless of whether it has been traveling for 1 hour or 5 hours.

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Answer:

Pavg =24.4×20800

Explanation:

1st u(initial velocity)=90×5/18=25m/s

v^2-u^2=2as........v=0

a=-20.8 then force=ma =1000×(-20.8)=-20800

P initial=f×u and P final=f×s/t

Pavg=Pi-Pf=fu-fs/t=f(25-15/25)=f(25-0.6)

Pavg=20800×24.4

Answer:

A

Explanation:

A) Force of gravity is 20 N       Yes -   Force is measured in N

B) No.....mass is generaly measured in KG or sub units of it

C) No ... meters is a measure of distance not force

D) No   acceleration is  m/s^2

Impulse in Physics is a term that is used to describe or quantify the effect of force acting over time to change the momentum of an object. It is represented by the symbol J and usually expressed in Newton-seconds or kg m/s.

Electricity generation using wind turbines involves converting the kinetic energy of wind into electrical energy. Wind turbines consist of blades that rotate when wind passes over them.

The rotation drives a shaft, which in turn powers a generator that produces electricity. The electricity generated is typically fed into the power grid, where it is distributed to consumers.

Horizontal axis wind turbines (HAWTs) are the most common type of wind turbine and have blades that rotate around a horizontal axis. HAWTs are typically more efficient than vertical-axis wind turbines (VAWTs) because they can capture more energy from the wind.

VAWTs have blades that rotate around a vertical axis and are less common. However, VAWTs can be better suited for certain applications, such as in urban areas where wind direction can be highly variable.

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Milo  need to leave home at 8.30am in order to get to the basketball game in time to warm up appropriately.

What advantages does a warm-up have?

Your heart rate and blood flow rise as you warm up. More oxygen can now go to your muscles thanks to this. The connections between your nerves and muscles are also activated and primed during a warm-up, which increases movement efficiency.

In general, warm-ups and cool-downs involve performing your activity more slowly and with lesser intensity. Perform five to ten minutes of low-intensity exercise before working out to warm up. Try exercises like jumping jacks, jogging, or walking. Try dynamic stretches, which get your body moving, as opposed to static stretches.

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The thickest layer of the earth is the mantle. Option b is correct answer.

The mantle is the layer between the crust and the core, and it makes up about 84% of the earth's total volume. It has a thickness of about 2,900 km, making it much thicker than the crust, which has an average thickness of about 35 km, and the core, which has a radius of about 3,485 km.

The mantle is composed of solid rock that is subject to intense heat and pressure, which causes it to flow like a viscous liquid over very long periods of time. It is divided into the upper and lower mantle, and it plays a crucial role in the movement of tectonic plates and the formation of volcanic activity. Therefore, option b is correct.

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Answer:

Below

Explanation:

Density is  mass / volume   so any of these that have numerator mass and denominator volume qualify  

g/ ml      and   kg/ L    are the only ones

The 12 parts of a microscope and their functions are: eyepiece, objective lens, stage, condenser lens, diaphragm, fine focus knob, coarse focus knob, arm, base, illuminator, nosepiece, and stage clips.

The eyepiece is where the user looks through to observe the specimen. The objective lens provides magnification of the specimen. The stage is where the specimen is placed for observation. The condenser lens focuses light onto the specimen. The diaphragm controls the amount of light that reaches the specimen. The fine focus knob fine-tunes the focus of the image.

The coarse focus knob adjusts the focus of the image roughly. The arm provides support for the microscope. The base provides a stable platform for the microscope. The illuminator provides light to the microscope. The nosepiece holds the objective lenses in place. The stage clips hold the slide in place on the stage. Together, these 12 parts work together to allow the user to observe and study microscopic specimens in detail.

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6kW is the useful power output of the crane.

Define power.

Energy consumption per second is measured as power. The amount of force necessary to create a unit displacement is another way to quantify power. Power, a scalar quantity, is represented by the letter P. For instance, a light bulb with 100 W of electricity will provide more light than one with 10 W.

The power in a circuit is measured using electrical power, which is given in watts. Electrical and mechanical-electrical techniques are used to measure electrical power in centrifugal pump applications. A watt, which represents power, is equivalent to one joule every second.

Power = Work done /Time taken

Time = 2 minutes = 120 seconds.

Work = 720kJ = 720000J

Power =  720000/120 = 6000W

P = 6kW

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The largest types of clouds found in the interstellar space is called Molecular clouds. It mostly composed of molecular hydrogen and dust.

Molecular clouds are also known as dark nebula, which is massive interstellar clump or cloud. It is completely opaque due to the presence of dust and are usually visualized as dark patches between bright galaxies. These molecular clouds are the birth place of stars.

These clouds have higher density because of the higher number of hydrogen molecules per cubic centimeters. Some is said to have more than 10⁵ H₂ molecules per cm³. These clouds are so large, even individual clouds are bigger than stars, and the whole clump may be so large that there will be 150 light years to travel across.

So the largest clouds in interstellar space are molecular clouds.

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The lowest fixed temperature on the Kelvin scale is 0 Kelvin which is also known as absolute zero.

The Kelvin scale is an absolute temperature scale, meaning that it starts from absolute zero, the theoretical lowest possible temperature. Absolute zero is defined as 0 Kelvin (0K), which is equivalent to -273.15 degrees Celsius or -459.67 degrees Fahrenheit. This is the lowest possible temperature that can be reached, and no temperature can be lower than absolute zero. Therefore, the lowest fixed temperature on the Kelvin scale is 0 Kelvin. Absolute zero is the theoretical lowest possible temperature, where the particles in a substance have the least possible amount of thermal energy. At this temperature, the particles would be completely at rest, and there would be no heat energy or movement at the atomic or molecular level.

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