What significant contribution did Lavoisier make to chemistry?

Answer: A: based in scientific evidence.

Explanation:

Scientific laws are made after proper research under varying conditions using scientific method to show that a particular theory is right under stated conditions

Scientific laws are carried out using methods ands not just any process with condition taken into consideration

Correct Answer is A. A:Olfactory

Taste disorders may be linked to a problem with the olfactory system.

Therefore the correct answer is option A.

The deliberate, empirically supported pursuit and application of knowledge and understanding of the natural and social worlds are what is known as science.

The physiological system that detects smells is called the olfactory system. The system contains the nasal cavities, which, in their bottom and top halves, respectively, support the olfactory mucous membrane for the sense of smell and function as breathing tubes.

As a result, olfactory system issues may be related to taste abnormalities; consequently, option A is the appropriate response.

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First calculate the time by using following equation:
d= (vi+vf)/2 x t 

where t = time

vi is the initial velocity = 23 m/s

vf is the final velocity  = 0 m/s

and d is the distance covered = 85m

85 = (23 + 0)/2 x t

t = 85/11.5 = 7.39s

Now use this equation to find acceleration:

a= (vf-vi)/t 

a = 0 – 23/ 7.39

a = -3.112 m/s²

so, the acceleration is 3.112 m/s²

The magnitude of the car's acceleration was 3.1 m/s²

Acceleration is rate of change of velocity.

[tex]\large {\boxed {a = \frac{v - u}{t} } }[/tex]

[tex]\large {\boxed {d = \frac{v + u}{2}~t } }[/tex]

a = acceleration (m / s²)v = final velocity (m / s)

u = initial velocity (m / s)

t = time taken (s)

d = distance (m)

Let us now tackle the problem!

Given:

initial velocity = u = 23 m/s

final velocity = v = 0 m/s

distance = d = 85 m

Unknown:

acceleration = a = ?

Solution:

[tex]v^2 = u^2 + 2ad[/tex]

[tex]0^2 = 23^2 + 2a(85)[/tex]

[tex]0 = 529 + 170a[/tex]

[tex]170a = -529[/tex]

[tex]a = -529 / 170[/tex]

[tex]\large {\boxed {a = -3.1 ~ m/s^2} }[/tex]

The acceleration was 3.1 m/s² in the opposite direction to its velocity.

A negative sign means the direction of acceleration is opposite to the direction of velocity.

Grade: High School

Subject: Physics

Chapter: Kinematics

Keywords: Velocity , Driver , Car , Deceleration , Acceleration , Obstacle , Speed , Time , Rate

Answer: 100%

Explanation:

Efficiency = output/input = 100/100 x 100 = 100% efficient

Machines are not 100% efficient because some of the work done by a machine is used to overcome friction. So work output is always less than work input.

Work: Done by machines is calculates as Mechanical Efficiency which is Work Output divided by Work Input.

Metals are good conductors of temperature and electricity. The electric iron can be used to remove the wrinkles on cloth as they can conduct heat and transfer it.

Metals are electropositive elements in periodic table. Metals have peculiar features such as malleability, ductility, luster , conductivity. etc. The most important property of metals being their higher conductivity of heat and electricity.

Metals are composed of particles strongly connected with metal - metal bonds. Hence, heat energy can be easily passed through the close packed system as well through the voids of the metal lattice.

Therefore, they can removes the wrinkles on cloth by high heat. Iron is a transition metal and is a good conductor. It is used in iron boxes to stiffen clothes by high heating.

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To determine the magnitude and direction of a vector with components vx and vy, use the formulas √(vx² + vy²) and θ = arctan(vy/vx) respectively. Take into account the signs of vy and vx for the right directional value.

The given question involves a vector operation to determine the magnitude and direction of velocity, denoted by 'v'. The vector 'v' has components 'vx=9.80 units' and 'vy=-6.40 units', and we can use these to find the magnitude and direction.

To find the magnitude, you use the formula for the magnitude of a vector: √(vx² + vy²), which in this case gives us v = √((9.80 units)² + (-6.40 units)²). The magnitude of v is the square root of the sum of the squares of vx and vy.

Next, to find the direction of the vector, we can use trigonometric concepts. The formula for the direction (θ) of a vector is θ = arctan(vy/vx). Here, direction stands for the angle the vector makes with the positive x-axis.

Note: Pay attention to the quadrant in which the vector exists based on the signs of vy and vx, to determine the right value for the direction.

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At the constant pressure, the final temperature of the gas was equal to 313ºC at a volume of 1200cm³. Therefore, option (D) is correct.

Charles's law can be explained as when the pressure is kept constant, the volume of gas is directly proportional to its absolute temperature.

Therefore, V∝ T

or       [tex]{\displaystyle \frac{V_1}{T_1} =\frac{V_2}{T_2}[/tex]                                                           ..................(1)

Given, the initial temperature of the gas, T₁ = 20 ºC

T₁ = 20 + 273 = 293 K

The initial volume of the gas, V₁ = 600 cm³

The final volume of the gas, V₂ = 1200 cm³

Substitute the value of V₂, T₁, and V₁ in equation (1) to find the final temperature of the gas:

[tex]{\displaystyle \frac{600}{293} =\frac{1200}{T_2}[/tex]

T₂ = 586 K

T₂= 586 - 273 = 313 ºC

Therefore, the final temperature of the gas was equal to 313 ºC at the volume of 1200cm³.

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Answer:

CCCCCCCCCCCCCCCCCC

Explanation:

Because the axis is tilted

Final answer:

The volume of the reservoir containing 22.0 acre-ft of water is approximately 89031.92 cubic meters (m³).

Explanation:

To find the volume in SI units of a reservoir containing 22.0 acre-ft of water, we need to convert the given volume from acre-ft to cubic meters (m³).

First, let's convert 1 acre to square meters (m²). We know that 1 acre is equal to 43,560 square feet (ft²). Therefore, 1 acre is equal to 43,560 ft² * (1 m² / 10.764 ft²) = 4046.86 m² (rounded to two decimal places).

Next, we convert 1 acre-ft to cubic meters. Since 1 acre-ft is defined as the volume that covers an area of one acre to a depth of one foot, we multiply the area in square meters (4046.86 m²) by the depth in feet. Therefore, 1 acre-ft is equal to 4046.86 m² * 1 ft = 4046.86 m³ (rounded to two decimal places).

Finally, to find the volume of the reservoir containing 22.0 acre-ft of water, we multiply the conversion factor (4046.86 m³/acre-ft) by 22.0 acre-ft.

22.0 acre-ft * 4046.86 m³/acre-ft = 89031.92 m³ (rounded to two decimal places).

Therefore, the volume of the reservoir containing 22.0 acre-ft of water is approximately 89031.92 cubic meters (m³).

The temperature is lower, so the tire contracts.

Answer: A velocity is correct

The velocity of a jet plane that travels 528 meters east in 4 seconds is calculated using the formula v=d/t. Substituting the given values we get the velocity as 132 meters per second east.

To calculate the velocity of the jet plane, we will use the straightforward formula for velocity. According to physics, velocity (v) is equal to the displacement divided by the time taken, v = d/t. In this case, the jet plane travels 528 meters east in 4 seconds. So we will substitute these values into the formula to find the velocity. Velocity = 528 meters / 4 seconds = 132 meters per second. Thus, the velocity of the jet plane is 132 meters per second towards the east.

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Mixtures with floating particles are called suspensions, where larger particles don't dissolve and eventually settle. Examples include muddy water and orange juice with pulp.

Mixtures that have floating particles are called suspensions.

- Colloids: These are mixtures where particles are evenly dispersed but do not settle out. Examples include milk and fog.

- Emulsions: These are mixtures of immiscible liquids, like oil and water, where one liquid is dispersed throughout the other in the form of small droplets. Examples include mayonnaise and vinaigrette.

- Solutions: These are homogeneous mixtures where one substance (solute) is dissolved in another (solvent) at the molecular level. Examples include saltwater and sugar dissolved in water.

- Suspensions: These are heterogeneous mixtures containing large particles that will eventually settle out over time. Examples include muddy water and orange juice with pulp.

Since you asked for the one with floating particles, the correct answer is suspensions.

The above statement is true

Swinging a tennis racket against a ball is an example of a third class lever.

Answer : The speed of the wave is 0.17 m/s

Explanation :

It is given that,

Wavelength of a wave, λ = 40 m

Time taken, t = 4 minutes = 240 seconds

Frequency, [tex]\nu=\dfrac{1}{T}=\dfrac{1}{240}\ Hz[/tex]

Speed of the wave = frequency × wavelength

v = υ × λ

[tex]v=\dfrac{1}{240}\times 40[/tex]

v = 0.167 m/s

or v = 0.17 m/s

The speed of the wave is 0.17 m/s

Hence, this is the required solution.