mercury is a liquid or not​

Measurements taken with a spectrometer require a cuvette to eliminate background readings from components other than what is being measured in the sample.

A spectrometer technological device is a tool used in the b]lab to determine the light that may pass across a substance, which is an intrinsic property of a material and can be used to determine the type of biomolecule.

Therefore, with this data, we can see that a spectrometer technological device is used to determine the substance by using light as source to measure.

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The input power required for a mass flow rate of 60 kg/min is calculated to be 871.35 kW.

Given that,

Initial temperature T₁ = 295 K

Final temperature T₂ = 460 K

Initial pressure P₁ = 105 k pa

Final pressure P₂ = 700 k pa

The specific heat loss from the compressor Q = 15 kJ/kg

The mass flow rate m = 60 kg/min

Refer to the properties of element to determine the specific heat of helium.

Cp = 5.19 kJ/kg.K

Apply the energy balance equation for calculating the input power.

W - m Q = m h₁ - m h₂

W - m Q = m (h₁ - h₂)

W - m Q = m Cp (T₁ - T₂)

where,

W is the input power

h₁ and h₂ are the initial and final enthalpy

Placing the values in the above expression, we have,

W - 60 kg/min (1 min/60 sec) × (-15 kJ/kg) = 60 kg/min (1 min/60 sec) × 5.19 kJ/kg.K (295 K - 460 K)

W = -871.35 kJ.s (1kW/1kJ) = -871.35 kW

Thus, the input power = 871.35 kW.

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Answer:

Particles can be classified as hadrons – baryons and mesons – and leptons, each with its anti-particle, and they should know that interactions between these particles can be described in terms of transfer of other particles known as vector bosons.

Explanation:

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To find the amount of electricity used by the 100-watt bulbs, we need to first calculate the total wattage of the bulbs by multiplying the wattage of each bulb by the number of bulbs: 100 watts/bulb * 3 bulbs = 300 watts

Next, we need to convert the time the bulbs were used from hours to seconds. Since there are 3600 seconds in an hour, the bulbs were used for 5 hours * 3600 seconds/hour = 18000 seconds.

Now we can calculate the total amount of electricity used by the 100-watt bulbs by multiplying the wattage of the bulbs by the time they were used: 300 watts * 18000 seconds = 5.4 x 10^7 joules

To convert this to kilowatt-hours, we need to divide by the number of joules in a kilowatt-hour, which is 3.6 x 10^6. This gives us a total of 1.5 kWh.

At a cost of 9¢ per kWh, the cost of using the 100-watt bulbs for 5 hours per day is 1.5 kWh * $0.09/kWh = $0.135 per day.

To find the amount of money that would be saved by switching to 60-watt bulbs, we need to repeat the above calculation using the wattage of the 60-watt bulbs instead of the 100-watt bulbs. The total wattage of the 60-watt bulbs is 60 watts/bulb * 3 bulbs = 180 watts. This means that the total amount of electricity used by the 60-watt bulbs would be 180 watts * 18000 seconds = 3.24 x 10^7 joules, or 0.9 kWh.

At a cost of 9¢ per kWh, the cost of using the 60-watt bulbs for 5 hours per day is 0.9 kWh * $0.09/kWh = $0.081 per day.

Therefore, the amount of money that would be saved by switching to 60-watt bulbs is $0.135 per day - $0.081 per day = $0.054 per day.

Radiation is energy that comes from a source and travels through space at the speed of light. This energy has an electric field and a magnetic field associated with it, and has wave-like properties. You could also call radiation “electromagnetic waves”.

cdc

The volume of air inside the bag when the aircraft is on the ground is 400 cm3.

Boyle's Law states that the pressure of a gas is inversely proportional to its volume when the temperature is held constant.

Boyle's Law is used in a variety of real-world applications such as scuba diving, where it is used to calculate the volume of compressed air required for a dive. It is also used in the design of compressed air systems, gas storage tanks, and other applications where the volume and pressure of gases are important factors.

The volume of air inside the bag when the aircraft is on the ground can be calculated using Boyle's Law: P1V1 = P2V2, where P1 is the initial pressure, V1 is the initial volume, P2 is the final pressure, and V2 is the final volume.

Using this formula, we can solve for V2:

V2 = (P1 x V1) / P2 = (80 kPa x 500 cm3) / 100 kPa = 400 cm3.

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Answer:

A

Explanation:

Answer:

Answer A-93

Explanation:

Once the object is dropped ,The only force acting on it is gravity.so acceleration due to gravity is 9.8 m/\(s^{2}\).

Given,

Initial velocity = u = 0

Time taken = t = 0

Acceleration = g = 9.8 m/\(s^{2}\)

Using \(3^{rd}\) equation of motion ,

v = u + at

v =( 0 )+ (9.8) *(3)

v = 29.4

v≈ 30 m/s

So, the speed of object is 30 m/s.

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An iron carbon alloy is considered steel when its carbon percentage falls within the range of 0.02% to 2.1%. If the carbon content exceeds 2.1%, the alloy is classified as cast iron.

Steel is an iron carbon alloy that contains relatively low carbon percentages. Typically, steel is defined as an alloy with a carbon content ranging from 0.02% to 2.1%. The presence of carbon in this range imparts desired mechanical properties to steel, such as strength, hardness, and toughness. The specific carbon content within this range can vary based on the desired characteristics of the steel, with higher carbon percentages leading to increased hardness and lower ductility.

In contrast, cast iron is an iron carbon alloy with a higher carbon content than steel. Cast iron is typically defined as an alloy with a carbon percentage exceeding 2.1%. The higher carbon content in cast iron results in a material that is more brittle and less malleable compared to steel. This makes cast iron suitable for applications where high hardness, wear resistance, and good castability are required, such as in engine blocks, pipes, and cookware.

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RS is a composition of rotation and reflection in the Euclidean plane E². The precise description of RS depends on the specific properties of the rotation R and reflection S.

In general, if R and S have the same axis or line of symmetry, the composition RS results in a translation. If R and S have intersecting lines of symmetry, RS yields a glide reflection. If R and S have perpendicular lines of symmetry, RS produces a rotation.

It is important to consider special cases, such as parallel lines of symmetry, coinciding axes, or perpendicular lines of reflection, as they may lead to different outcomes. The classification of isometries in E² involves understanding how rotations and reflections combine to create different transformations in the plane.

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Hi there!

For an object moving in a circle:

Centripetal force = ∑F = mv²/r

Thus:

56 = mv²/r

Rearrange to solve for velocity:

√(56r/m) = v

√(56 × 21)/650 = 1.345 m/s

Answer:

Explanation:

have a good day

50 degree is equal to 313 kelvin and 34 degrees is equal to 277 kelvin.

Temperature scale with an absolute zero below which temperatures do not exist, the Kelvin scale. The temperature at which molecular energy is at its lowest is absolute zero, or 0°K, which is equal to 273.15° on the Celsius temperature scale.

Since the Kelvin degree is the same magnitude as the Celsius degree, the freezing point of water (zero degrees Celsius) and the boiling point of water (one hundred degrees Celsius) are equivalent to 273.15°K and 373.15°K, respectively, in Celsius.

It is customary to remove the degree symbol and instead use the letter K when writing temperatures in the Kelvin scale. William Thomson Kelvin, a British mathematician and physicist, proposed the temperature scale in 1848, and it bears his name. another scale for absolute temperature.

Therefore, 50 degree is equal to 313 kelvin and 34 degrees is equal to 277 kelvin.

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Answer:

Sunlight is a mixture of colors. When it passes through a glass prism, some of the light is bent, or refracted, more than other portions. And just as sunlight passing through a prism is bent, so is sunlight passing through drops of water. This produces an atmospheric solar spectrum in the sky for all to see: a rainbow.

Explanation:

Answer: B - Both electric and magnetic fields

Explanation: Ap*x verified just did the test and got it correct, answer is right infront of me at the moment

Answer: B

Explanation: just took the quiz on AP3X

Answer:

Soft serve ice cream

Explanation:

1g fat = 9 calories

take the fat numbers for each option and multiple by 9 and see who gives you 101

vanilla ice cream = 11.2 x 9 = 100.8 rounded to 101

frozen yogurt = 4 x 9 = 36

French fries = 24.7 x 9 = 222.3

pretzels = 1 x 9 = 9

Answer:

v = 8.12 m/s

Explanation:

The centripetal acceleration of the yo-yo is given by the following formula:

\(a_c = \frac{v^2}{r}\\\\v^2 = a_cr\\v = \sqrt{a_cr}\)

where,

v = tangential speed = ?

ac = centripetal acceleration = 200 m/s²

r = radius = length of string = 0.33 m

Therefore, using the given values in the formula, we get:

\(v = \sqrt{(200\ m/^2)(0.33\ m)}\)

v = 8.12 m/s

the right answer of the question is true

Answer: 1.4

Explanation:

2.5/.25 = 10

sqrt(20/10) =1.4

The speed of the wave on the stretched string is 1.41 m/s.

To calculate the speed of the wave, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into the equation 1

Hence, the speed of the wave on the stretched string is 1.41 m/s.

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Distance = 10 miles

Displacement = zero

The coach must be fired and disciplined.

Answer:

$92,000

Explanation:Happiness starts from within.

The United States those who earn more than amount is $92000. Hence option 1 is correct.

Happiness is defined as an emotional condition characterized by emotions of happiness, pleasure, and satisfaction. The following three things have an impact on happiness: meaningful relationships with other people. preserving a nice hobby or workplace. assisting individuals in need or the community.

People who place a higher value on time than money are generally happier than those who do not think that having more time is preferable to having more money, according to a UCLA research of 4,400 Americans. In a six-month experiment, those who received $10,000 financial transfers generally felt happier than those who did not.

Thus, the United States those who earn more than amount is $92000. Hence option 1 is correct.

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For the same spring, the value of spring constant must be same. The relation between the force and the spring constant is given by Hooke's law

so,  20 N force stretch 4 cm.

For the same spring, the value of spring constant must be same. The relation between the force and the spring constant is given by Hooke's law as :

F=kx

where

F = Force

k = is spring

constant  

x = stretches

here

10/ 2 = 20/ x

x -= 4 cm .

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Answer:

the orbital in which the electron is located relative to the atom's nucleus.

Explanation:

Answer:

the principal energy level of an electron refers to the shell or orbital in which the electron is located relative to the atom's nucleus.

By using a hot wire anemometer and measuring the dominant frequency of the flow, we can determine the velocity of the flow around the flagpole.

To measure the dominant frequency of vibrations in the flow around a flagpole using a hot wire anemometer, the following components are needed:

Flagpole: This is the main structure being investigated, with a known diameter of 20 cm and a Strouhal number (Sr) of 0.2.

Hot wire anemometer: The anemometer consists of a thin wire made of a temperature-sensitive material, such as platinum or tungsten. The wire is mounted in the flow and heated to a constant temperature using electrical current.

Signal conditioning circuitry: This circuitry is responsible for controlling the current passing through the wire and measuring the voltage across it.

Data acquisition system: This system records the electrical signal from the hot wire anemometer for further analysis.

The physical principle behind the hot wire anemometer is that as the flow velocity increases, it cools the heated wire, causing a change in its resistance. This change in resistance leads to a variation in the voltage across the wire, which is proportional to the flow velocity.

By measuring the dominant frequency of the flow using the hot wire anemometer, valuable information can be obtained.

In this case, if the measured frequency is f = 20 Hz, and the Strouhal number (Sr) is known to be 0.2, we can calculate the flow velocity (V) as follows:

V = Sr * f * d

where d is the diameter of the flagpole. Plugging in the values, we have:

V = 0.2 * 20 Hz * 0.2 m

V = 0.8 m/s

Therefore, the obtained information is that the flow velocity around the flagpole is 0.8 m/s.

In conclusion, by using a hot wire anemometer and measuring the dominant frequency of the flow, we can determine the velocity of the flow around the flagpole.

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To drag the box from point A to B on a horizontal surface using a horizontal force of 10 N, a work of 60 joules (J) must be done over a distance of 6 meters (m).

On a horizontal surface, if a box is dragged from point A to B by a horizontal force of 10 N, the work done can be calculated using the formula:

Work = Force x Distance

In this case, the force applied is 10 N and the distance between points A and B is 6 m.

Plugging these values into the formula, we get:

Work = 10 N x 6 m = 60 Nm

The unit for work is joules (J), so the work done in this scenario is 60 J.

When a force is applied to move an object, work is done.

The work done is calculated by multiplying the force applied by the distance over which the force is exerted.

In this case, the force applied is 10 N and the distance is 6 m.

Multiplying these values gives us the work done, which is 60 J.

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Answer:

A and B are false.

C and D are plausible. I would bet on D.

Answer:

The weight of huifen is equal to 529.2 N.

Explanation:

Given that,

Mass of huifen = 54 kg

We need to find the weight of huifen. We know that, the weight of an object is given by :

W = mg

Where

g is acceleration due to gravity

Put all the values,

W = 54 × 9.8

W = 529.2 N

So, the weight of huifen is equal to 529.2 N.

Answer:

If you want the true weight of someone, you need to multiply mass by gravity which is 54*9.81 giving the calculation in Newtons and this would equal 529.74N

Explanation:

Answer:

Resolve the vectors:

F1 = 30 cos 30 i + 30 sin 30 j = 26 i + 15 j

F2 = 80 cos 135 i + 80 sin 135 j = -56.6 i + 56,6 j

F1 + F2 = (26 - 56.6) i + (15 + 56.6) j = -30.6 i + 71.6 j

The offsetting force would be

F3 = 30.6 i - 71.6 j

The magnitude of this vector is (30.6^2 + 71.6^2)^1/2 = 77.9

cos theta 3 = 30.6 / 77.9 = 66.9 deg

Check:

77.9 * sin 66.9 = 71.6  agreeing in magnitude with F3

Now we need the quadrant of the offsetting vector

sin theta 3 = -         cos theta 3 = +

This occurs in the fourth quadrant and theta 3 = 360 - 66.9 = 293.1 deg