How high a column of sae 30 oil would be required to give the same pressure as 700 mm hg?

Answer:

μ = .4842

Explanation:

Assuming constant acceleration and the object is sliding on a level surface:

Let's start off by finding the acceleration of the object.

v² = v₀² + 2aΔx

Now, we can make a free-body diagram and see that the only force opposing the object's motion is the friction force -- this is the only force in the x-direction.

We can use Newton's 2nd Law: F = ma to solve for the coefficient of friction.

F = ma

Now, we have:

The mass cancels out and solving for the coefficient of friction gives us:

We know the acceleration is -4.75 m/s² and g = -9.81 m/s²:

The coefficient of kinetic friction between the surfaces, assuming constant acceleration and a flat surface, is 0.4842.

Answer:

it is refracted

Explanation:

Answer:

multiply

Explanation:

multiply

Answer:

90km/h

Explanation:

To calculate the average translational kinetic energy, we can use the following formula: KE = (1/2)mv²Where KE is the kinetic energy, m is the mass of the particle, and v is the velocity of the particle.

The kinetic energy is directly proportional to the velocity and the mass of the particle. Therefore, if we want to find the average kinetic energy, we need to find the average velocity and mass of the particles.

KE = (1/2)mv²,

where KE is the kinetic energy, m is the mass of the particle, and v is the velocity of the particle.

To calculate the average kinetic energy, we need to use the formula

Average KE = (1/2) x Average mass x (Average velocity)²

We can then use the above formula to find the average kinetic energy.

In conclusion, the average kinetic energy is directly proportional to the average velocity and the average mass of the particles.

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The magnitude of the beetle's average velocity for the whole trip is approximately 0.106 m/s.

To find the magnitude of the average velocity, we'll need to calculate the total displacement and total time.

The table is 1.5 m on each side.

The beetle travels along two sides, so its total displacement is 1.5 m + 1.5 m = 3.0 m.

The total time taken is 20.0 s + 12.5 s = 32.5 s.

The average velocity can be calculated as:
Average velocity = Total displacement / Total time
Average velocity = 3.0 m / 32.5 s ≈ 0.092 m/s

Summary: The magnitude of the beetle's average velocity for the whole trip on the square kitchen table is approximately 0.092 m/s.

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The beetle's average velocity for the trip is calculated by finding the total displacement (2.12 m) and dividing it by the total time (32.5 s). This results in an average velocity of 0.065 m/s.

The subject of this question is Physics, particularly dealing with concepts of displacement, average velocity, and vector quantities. The average velocity, in this case, is the total displacement (change in position) divided by the total time. The beetle's trip consists of two legs: first, it travels east for 1.5 m, then turns north and travels for another 1.5 m. This makes the total displacement of the beetle to be 1.5 m east + 1.5 m north = 2.1 m in a northeast direction. The total time of this trip is 20.0 s + 12.5 s = 32.5 s.

When it comes to calculating the magnitude of this displacement (ignoring the north/east directions and focusing only on the total distance), we need to consider that the beetle has essentially moved diagonally across a square table. If we treat this as a 45-degree right triangle, where the legs are each 1.5 m, the hypotenuse (total displacement) can be found using the Pythagorean theorem: hypotenuse = √(1.5^2 + 1.5^2) ≈ 2.12 m.

The average velocity of the beetle is now found by dividing this total displacement by the total time: average velocity = total displacement / total time = 2.12 m / 32.5 s = 0.065 m/s. So, the magnitude of the beetle's average velocity for the entire trip is 0.065 m/s.

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An ensemble forecast is considered robust when the following conditions are met:

1) The individual members of the ensemble produce similar forecasts.

This means that the different members of the ensemble are in agreement with each other in terms of the predicted weather pattern, temperature, or other relevant meteorological variables.

2) The ensemble mean is a good predictor of the actual outcome.

The ensemble mean is calculated by averaging the forecasts from all the members of the ensemble.

If the ensemble mean is close to the observed value, it suggests that the ensemble forecast is reliable.

4) The ensemble spread is not too large.

The ensemble spread is a measure of the variability of the different members of the ensemble.

If the spread is too large, it indicates that the model is uncertain about the forecast, and the confidence in the forecast is reduced.

However, if the spread is too small, it can indicate that the model is not capturing all the sources of uncertainty, and the forecast may be overly confident.

5) The ensemble has a good track record.

A model that has produced accurate forecasts in the past is more likely to produce reliable forecasts in the future.

Therefore, a robust ensemble forecast is one that has a proven track record of accuracy and reliability.

In summary, an ensemble forecast is considered robust when the individual members of the ensemble produce similar forecasts.

The ensemble mean is a good predictor of the actual outcome, the ensemble spread is not too large, and the ensemble has a good track record of accuracy and reliability.

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The potential energy and kinetic energy are constantly changing because of law of energy conservation as the kinetic energy is constantly being converted into potential energy and vice versa.

The law of conservation of energy states that energy can neither be created nor destroyed but can be converted from one form to another.

The total mechanical energy of any system is made up of kinetic energy and potential energy.

The kinetic energy is the energy of the object due to its motion while the potential energy is the energy of the object due to its height above the ground.

Based on the law of conservation of energy, the kinetic energy of an object can be converted into potential energy and from potential energy to kinetic energy.

Thus, the potential energy and kinetic energy are constantly changing because of law of energy conservation as the kinetic energy is constantly being converted into potential energy and vice versa.

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The force exerted by the biceps and the elbow is 239.9 N and 215.89 N respectively.

When we use only your forearms to lift an object, assume that your biceps are the main muscle that lifts your arm. Suppose the weight of the forearm he is 1.50 kg. If the biceps is attached to the forearm 2.50cm from the elbow, with the forearm parallel to the floor, flex the biceps to hold a 950g ball on the end of the elbow at a distance of 36.0cm from the elbow.

Against this background,

forearm mass = 1.50 kg

forearm length = 2.50 cm

The weight of the ball is 950 g.

36.0 cm ball spacing

Forearm strength needs to be calculated. Balance Elbow Using

Torque,

Fb x Db = Wf x Df/2 + Wball x Dball

Putting Value,

Fb x .025 = 1.5 x 9.8 x .36/2 + 0

95 x 9.8 x 0.36

Fb = 239.9 N

Now elbow force,

Fb = Fl + Wf + Wb

Fl = Fb - Wf - Wb

Putting value,

Fl = 239 .9 - (1.5 x 9.8 ) - (0.95×9.8)

Fl = 215.89 N.

Therefore the force on the elbow is 215.89 N.

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An atomic mass unit (amu) is one-twelfth of the mass of an unbound carbon-12 atom, and it is used to express the mass of atomic and subatomic particles.

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Answer:8.1g

Explanation:

Explanation:

you can find by using. volume = mass/ density of aluminium.

Answer:

ndndnskiaidjdjjdndndkkskdldo

Answer:

In humans, each cell normally contains 23 pairs of chromosomes, for a total of 46.

The magnitude of the magnetic force on the proton is 4.31 × 10⁻¹¹ N.

Given values: B = 5.5 Tθ = 25°q = 1.602 × 10⁻¹⁹ VC = 1.00 × 10⁷ m/s Formula: The formula to calculate the magnetic force is given as;

F = qvBsinθ

Where ;F is the magnetic force on the particle q is the charge on the particle v is the velocity of the particle B is the magnetic field strengthθ is the angle between the velocity of the particle and the magnetic field strength Firstly, we need to determine the angle between the velocity vector and the magnetic field vector.

From the given data, The angle between velocity vector and x-axis;α = -15°The angle between magnetic field vector and x-axis;β = 25°The angle between the velocity vector and magnetic field vectorθ = 180° - β + αθ = 180° - 25° - 15°θ = 140° = 2.44346 rad Now, we can substitute all given values in the formula;

F = qvBsinθF

= (1.602 × 10⁻¹⁹ C) (1.00 × 10⁷ m/s) (5.5 T) sin (2.44346 rad)F

= 4.31 × 10⁻¹¹ N

Therefore, the magnitude of the magnetic force on the proton is 4.31 × 10⁻¹¹ N.

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Answer:

A child holds the bar of a set of weights without moving I think

Answer:

This is because the 11 positive protons and 10 negative electrons end up with an overall charge of +1.

Explanation:

Answer:

One electron in it's outer shell

Answer:

By Gauss' Law the sphere will appear externally as if all of the charge were concentrated at the center of the sphere.

E = K Q / r^2 = K Q / .528^2

Q = 1710 * .528^2 / 9.00E9 Coulombs

Q = 5.30E-8 Coulombs on sphere

V = 4/3 π R^3 = 4/3 π * .384^3 = .237 m^3

ρ = Q / V = 5.30E-8 / .237 = 2.23E-7 C/m^3

At .223 from center Q = 4/3 π .223^3 * ρ  (charge outside this radius will not affect electric field outside .223 m)

Q = 2.23E-7 * 4/3 * π * .223^3 = 1.04E-8 Coulombs

E = 9.00E9 * 1.04E-8 / .223^2 = 1880 N/C

Answer:

The time it takes the ball to fall 3.8 meters to friend below is approximately 0.88 seconds

Explanation:

The height from which the student tosses the ball to a friend, h = 3.8 meters above the friend

The direction in which the student tosses the ball = The horizontal direction

Given that the ball is tossed in the horizontal direction, and not the vertical direction, the initial vertical component of the velocity of the ball = 0

The equation of the vertical motion of the ball can therefore, be represented by the free fall equation as follows;

h = 1/2 × g × t²

Where;

g = The acceleration due gravity of the ball = 9.81 m/s²

t = The time of motion to cover height, h

Then height is already given as h = 3.8 m

Substituting gives;

3.8 = 1/2 × 9.81 × t²

t² = 3.8/(1/2 × 9.81) ≈ 0.775 s²

∴ t = √0.775 ≈ 0.88 seconds

The time it takes the ball to fall 3.8 meters to friend below is t ≈ 0.88 seconds.

Option A. An electromagnetic wave at very long wavelength (low frequency) best describes a radio wave.

A radio wave is best described as an electromagnetic wave at a very long wavelength or low frequency. It is not a pressure wave. Radio waves are a type of electromagnetic radiation, which also includes other forms such as visible light, infrared, and X-rays. The term "wavelength" refers to the distance between two consecutive points in a wave, such as from one crest to the next. In the case of radio waves, the wavelength is quite long, ranging from several millimeters to hundreds of meters. This long wavelength allows radio waves to travel long distances and pass through obstacles such as buildings and trees. Radio waves are used for various purposes, including communication, broadcasting, and radar systems. For example, when you listen to the radio, the sound is encoded onto a carrier wave, which is a specific radio wave frequency. The receiver then extracts the sound from the carrier wave, allowing you to hear it. Similarly, radar systems use radio waves to detect and track objects like airplanes or weather patterns. To summarize, a radio wave is an electromagnetic wave at a very long wavelength or low frequency. It is not a pressure wave. Radio waves are used for communication, broadcasting, and radar systems due to their ability to travel long distances and pass through obstacles. They play a crucial role in everyday life, allowing us to enjoy wireless communication and entertainment.

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The given reaction, HCl + NaOH --- NaCl + H₂O is an example of an exothermic reaction. Hence, option A is correct.

In a reaction, the energy released in the form of heat is called an exothermic reaction. In an exothermic reaction, the heat energy is transferred to the surroundings. The chemical equation is Reactant = Product + Energy.

The energy absorbed from the surroundings is called an endothermic reaction. The heat energy taken from the reactants to form a product is called an endothermic reaction. It is described by the chemical equation as Reactant + Energy = Product.

From the given reaction,

HCl + NaOH --- NaCl + H₂O

HCl and NaOH is reactant and NaCl and water is a product. When strong acid (HCl) is mixed with a strong base (NaOH), it gives sodium chloride(NaCl) and water along with heat energy.

When the product is formed from the reactant, heat energy is released. This reaction is also called a Neutralisation reaction. The neutralization reaction are exothermic reaction, that forms chemical bonds by the release of energy.

When water is formed as a product by the release of greater energy than the energy absorbed is called a Neutralization/ exothermic reaction. Hence, the correct option is A) It is exothermic.

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Answer:

Explanation:

Velocity by definition means speed and direction of an object. This means it has a value and a positive or minus sign indicating direction. Speed is the absolute value of velocity because there is no direction correlated with speed. If you add a direction, it is then called velocity

Answer:

answers are conductive and electric potential

Explanation:

Charges are equally spaced over the surface of a conductive sphere and the electric potential across any two points on the sphere is zero

The first type of brush to demonstrate that it was more effective than a manual brush was the electric toothbrush.

Electric toothbrushes were developed and introduced as an alternative to manual toothbrushes in the mid-20th century. The electric toothbrush operates with rotating or vibrating bristles, powered by an electric motor. This automated brushing action is believed to provide more thorough and consistent cleaning compared to manual brushing.

Numerous studies and clinical trials have shown that electric toothbrushes can be more effective in removing plaque, reducing gum inflammation, and improving overall oral hygiene compared to manual toothbrushes. The automated brushing motion of electric toothbrushes can help individuals achieve proper brushing technique and reach areas that are difficult to clean with a manual brush.

Since their introduction, electric toothbrushes have gained popularity and have continued to evolve with advanced features such as timers, pressure sensors, and various brush head designs to cater to different oral care needs.

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The transduction of sound waves to changes in membrane potential takes place : in the inner ear, specifically in the cochlea.

The cochlea is a spiral-shaped structure in the inner ear responsible for converting sound waves into electrical signals that can be interpreted by the brain.

Within the cochlea, there are specialized sensory cells called hair cells. These hair cells have tiny hair-like projections called stereocilia that are embedded in a gel-like structure called the tectorial membrane. When sound waves enter the cochlea, they cause the fluid inside the cochlea to vibrate.

As the fluid moves, it causes the basilar membrane (located underneath the hair cells) to move up and down. This motion causes the stereocilia on the hair cells to bend. The bending of stereocilia opens ion channels, allowing certain ions, such as potassium, to enter the hair cells. This influx of ions generates changes in the membrane potential of the hair cells, creating electrical signals.

The electrical signals are then transmitted through the auditory nerve to the brain, where they are interpreted as sound. Thus, the transduction of sound waves to changes in membrane potential occurs in the hair cells of the cochlea.

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Answer:

Explanation:

Since forces are acting in opposite direction

Net force on the car = 50 - 30 = 20 N

mass of car

= weight / g

= 100 / 10

m = 10 kg

acceleration of car = net force / mass

= 20 / 10

= 2 m /s² .

The linear speed of the clothes as a spin in the barrel is 102.1 m/s.

The linear speed of the clothes is the measure of the change of displacement of the clothes with time.

Mathematically, the formula for linear speed is given as;

v = ωr

where;

The angular speed of the wash machine is given as;

ω = 1950 rpm = 1950 rev/min x 2π rad/rev x 1 min/60 s = 204.2 rad/s

v = 204.2 rad/s x 0.5 m

v = 102.1 m/s

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Answer:

Explanation:

Discount the time here; it's not important. It doesn't tell you how long it takes the car to stop, it only refers to reaction time, which means nothing in the scheme of things.

The useful info is as follows:

initial velocity = 20 m/s

final velocity = 0 m/s

a = -10 m/s/s

and we are looking for the displacement. Use the following equation:

\(v^2=v_0^2+2a\)Δx

where v is the final velocity, v₀ is the initial velocity, a is the deceleration (since it's negative), and Δx is displacement. Filling in:

\(0^2=(20)^2+2(-10)\)Δx and

0 = 400 - 20Δx and

-400 = -20Δx so

Δ = 20 meters

Answer:

C should be the correct answer,

Explanation:

The gas which produce heat in the atmosphere as it is increased is called a greenhouse gas.  Gases like argon , nitrogen, and Oxygen etc. is not a greenhouse gas. Since O3 is not a greenhouse gas it cannot produce heat in the atmosphere .

Hope you understand,

The positive effects of Industrialization are that it

hope it helps

Answer:

C

Explanation: