Mass of substance is 0.6324 kg
Given:
volume = V = 680ml = 0.68 L
density = D = 0.930
To Find:
mass in kg
Solution: mass, in physics, quantitative measure of inertia, a fundamental property of all matter. It is, in effect, the resistance that a body of matter offers to a change in its speed or position upon the application of a force.
Density = mass/volume
mass = Density x Volume = 0.93 x 680
Mass = 0.6324 kg
Hence, the mass of substance is 0.6324 kg
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On hoods where sashes open vertically, work with the hood sash in the _____ position
On hoods where sashes open vertically, work with the hood sash in the lowest position.
What Is A Sash On A Fume Hood?In the event of a fire, the fume hood sash offers a containment space. It functions as a blast barrier. The sash itself, together with the bypass grill above the sash, controls the fume hood's airflow properties. The sash's position does regulate the air velocity traveling through the fume hood, even if it has no effect on the amount of air passing through the fume hood. Air velocity is another element that affects chemical vapor capture. Raising the sash reduces the capture velocity, allowing vapors to start flowing over the sill and into the room's air.
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How much did chevron pay in cash dividends to common shareholders during the first nine months of 2013? please provide your answer in millions without comma separator or decimal (ex: 343323456)
The correct answer for chevron pay in cash dividends to common shareholders during the first nine months of 2013 is 5572144100 dollors .
The dividend paid by Chevron foe 9 months of 2013 is $ 5572 millions.
Calculation:
No. Of outstanding shares = 1,921,429,000
Dividend per share = $2.9
Dividend paid = No. of outstanding shares * dividend per share
= 1,921,429,000 * 2.9
= $5,572,144,100
A dividend is a payment made to shareholders in exchange for their investment in a company's equity, and it is usually derived from the company's net profits. When a cash dividend is paid, the funds are transferred to a liability account known as dividends payable.
When the company makes the payment on the dividend payment date, which is usually a few weeks after the ex-dividend date, this liability is removed. Cash dividends and tick dividends have no effect on a company's net income or profit.
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Electrical insulating gloves marked with a beige label have a maximum use voltage level of _____ v.
The maximum use voltage level for electrical insulating gloves with a beige label is 17000 v AC.
By electrical insulating gloves, what do you mean?To prevent burns and electrical shocks, users should wear electrically insulated rubber gloves. To shield workers from electrical shock, these are constructed of dielectric materials. Electricians working on electrical lines don rubber gloves, sometimes known as lineman's gloves. The gloves are tested at voltages higher than those for which they are rated. Rubber insulating gloves are the first line of defense, offering protection against shock and electrocution when coming into touch with electrified electrical parts and equipment, in contrast to arc flash protective suits, which are intended to lessen or eliminate injuries after an incident occurs. Rubber is a reliable form of shock protection because it doesn't conduct electricity. Rubber is a natural insulator, thus it will prevent electric currents from passing through your skin, unlike many other materials that behave as conductors.
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what do scientists do with a theory of a new evidence does not support a theory??
The scientists will search and do more research about it
Complete the statement detailing the relative change in [h ][h ] when the phph of a solution changes from 6.406.40 to 8.40.
When a solution's pH increases from 6.40 to 8.40. is 100 times smaller.
What is the solution described?In chemistry, a solution is a homogeneous mixture of two or more compounds in their relative proportions, which can be constantly changed up to what is known as the limit of solubility. Although solutions of gases and solids are possible, the term "solution" is most frequently used to refer to the liquid condition of matter.
What three types of solutions are there?Solutions that are isotonic, hypotonic, and hypertonic (tonicity).
What is the significance of the solution?Any of the phases of matter can dissolve in another phase in a solution, which is a homogenous mixture of molecules. Solution chemistry is crucial because the majority of chemical reactions, whether they occur in a lab or in nature, take place in solutions, whether they involve solids, liquids, or gases.
According to given statement:pH = -log [H+]
6.4 = -log [H+]
[H+] = 3.981*10^-7 M
pH = -log [H+]
8.4 = -log [H+]
[H+] = 3.981*10^-9 M
We can see that [H+] at 8.40 is lower by 100 times as compared to [H+] at pH = 6.40.
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River water held behind a dam is a form of ________. group of answer choices
a. potential energy
b. chemical energy
c. thermodynamics
d. kinetic energy
Potential energy is present in the river water behind a dam.
How is potential energy defined?Potential energy is a form of stored energy that is dependent on the relationship between different system components. When a spring is compressed or stretched, its potential energy increases. If a steel ball is raised above the ground as opposed to falling to the ground, it has more potential energy.The object's mass, its mass in relation to some reference points, and the gravitational field it is in all affect the potential energy of the object.Joule is the SI unit of potential energy as a result (J)As weight and height increase, gravitational potential energy rises.
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A plane lands on a runway with a speed of 115 m/s, moving east, and it slows to a stop in 11.0 s. what is the magnitude and direction of the plane's average acceleration during this time interval?
By using uniform motion, the acceleration of plane is - 10.45 m/s² .
We need to know about the uniform motion to solve this problem. The uniform motion is the motion of an object which has acceleration applied. It can be determined as
vt = vo + a . t
vt² = vo² + 2a . s
s = vo . t + 1/2 . a . t²
where vt is final velocity, vo is initial velocity, a is acceleration, t is time interval and s is displacement.
From the question above, we know that:
vi = 115 m/s
vt = 0
t = 11 s
By using first equation, we can calculate the acceleration
vt = vo + a . t
0 = 115 + a . 11
11a = -115
a = - 10.45 m/s²
Hence, the acceleration of plane is - 10.45 m/s² .
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The body process in which an adequate supply of oxygen converts glucose into energy is called:________
Aerobic metabolism can occur both aerobically (using oxygen), or anaerobically (without oxygen). During aerobic cellular respiration, glucose reacts with oxygen, forming ATP that can be used by the cell.
What is Cellular respiration ?Through the process of cellular respiration, organisms mix oxygen with food molecules, directing the chemical energy contained in these substances toward life-sustaining processes while excreting carbon dioxide and water as waste.
Glycolysis, also known as the citric acid cycle, is the first stage of cellular respiration. The Krebs cycle, also known as the electron transport chain, is the second stage Anaerobic and aerobic respiration are the two basic forms of cellular respiration. It need oxygen (O2) to make ATP during an exclusive type of cellular respiration known as aerobic respiration.Learn more about Cellular respiration here:
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What did aristotle and ptolemy say about the relationship of earth to other celestial bodies?.
Aristotle and Ptolemy said that earth is in the center and all other planets move in a circular motion around Earth.
Aristotle from Classic Greece and Ptolemy from Roman Egypt agreed on three facts:
Earth and other celestial bodies are spherical in shape.Earth is in the center and all other celestial bodies revolve around it.The other planets orbit in a circular path.This model of the solar system with Earth in the center is called as Geocentric model.
Therefore, Aristotle and Ptolemy said that earth is in the center and all other planets move in a circular motion around Earth.
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A car is traveling at a speed of 33 m/s . (a) what is its speed in kilometers per hour? (b) is it exceeding the 90 km/h speed limit?
According to the statement:
a) speed is equal to 118 km/h in kilometres per hour.
b) yes it is exceeding 90km/h.
What does speed mean?The pace at which an object's position changes in any direction is referred to as speed. Speed is defined as the ratio of something like the distance traversed to the time required to cover that distance. . . Speed is a scalar quantity since it just has a direction and no magnitude..
How are the speeds determined?Speed is determined by dividing the distance by the time. Calculating the units for speed requires knowledge of the units for both time and distance.. The units in this example will be meters per second (m/s), since the distance is measured in meters (m) and the time is measured in seconds (s).
(a)s₂= 118.km/h is its speed in kilometres per hour.
1h = 3600s
1km = 1000m
s₂= (33m/s) *[tex]\left(\frac{60 \times 60}{1000}\right)[/tex]
= 118.8km/h
s₂= 118.km/h
(b) yes it is exceeding 90km/h.
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Assuming that the relationship between spring compression and height is quadratic, how far will the ball go at the highest setting, which compresses the spring 3 cm ?
Assuming that the relationship between spring compression and height is quadratic, 2.25m far will the ball go at the highest setting, compresses the spring 3 cm
How do you calculate a compression spring's solid height?The solid height, h1, of an unground spring is (n+1)d, where n is the number of coils and d is the wire diameter (including platings and coating) in inches. The height, h2, of ground but not squared springs is (n-1)d. The solid height, h3, of ground and squared springs is (n-0.75)d
When a spring is compressed, the potential energy is stored in the mechanical bonds between atoms, which may be thought of as little springs. The spring as a whole cannot decompress until it breaks, but little portions may when they fall off. The majority of the stored energy is used to decompress each little component.
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U = 3, 9 , v = 4, 2 (a) find the projection of u onto v. (b) find the vector component of u orthogonal to v.
Answer:
(a) At U = 3, 9 , v = 4, 2, the projection of u onto v is w1=<2,8>
(b)At U = 3, 9 , v = 4, 2, the vector component of u orthogonal to v is w2 = <4,-1>
Explanation:
A
The projection of u onto v is given by:
w1= projvu = (u⋅v||v||2)v
Given that u= <6,7> and v=<1,4>, we can find the projection of u onto v as shown below:
w1= projvu = (u⋅v||v||2v=(<6,7>⋅<1,4><1,4>⋅<1,)
=(6⋅1+7⋅41⋅1+4⋅4)<1,4>
=3417<1,4>
=<2,8>
Part B
The vector component of u orthogonal to v is given by:
Using the given vectors and the projection found in part (a), we can find the vector component of u orthogonal to v as shown below:
w2=u−projvu
=<6,7≻<2,8>
=<(6−2),(7−8)>
=<4,−1>
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The force that accelerates a rocket in outer space is exerted on the rocket by the?
Gases at pressure are released by rockets as they travel towards space. According to Newton's third law, the combustion chamber's exhaust gases push the rocket with an accelerating force known as the thrust.
Explain exactly Newton's Third Law:According to Newton's third law, if an object A pulls on an object B, then object B must exert an equal-sized and opposite-direction force on the first thing directed in the opposite direction. This law illustrates a symmetry in nature whereby forces always occur in pairs and whereby no body can exert a force without also being subjected to one.
What are Newton's 3rd law examples?Action and response are always equal but always move in the opposite direction, according to Newton's third law of motion. A human walking on the ground, a hammer driving a nail, a magnet attracting a paper clip, and a horse pulling a cart are all examples of Newton's third rule of motion.
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Use logarithmic differentiation to find the derivative of the function. y = x4 sin x
The derivative of the function is dy/dx = 4([tex]x^{4sinx}[/tex])[(sin x) / x + (cos x) (ln x)]
y = [tex]x^{4sin x}[/tex]
Taking the log of both sides:
ln y = sin x ln [tex]x^{4}[/tex] = (sin x) * (4 ln x) = 4 (sin x)(ln x)
Now differentiate both sides. On the left you'll need to use the chain rule, and on the right you'll use the product rule:
1/y dy/dx = 4[(sin x) (1/x) + (cos x)(ln x)] = 4 [(sin x) / x + (cos x)(ln x)]
Multiply both sides by y
dy/dx = y * 4 [(sin x) / x + (cos x)(ln x)]
Since y = [tex]x^{4sinx}[/tex], we can rewrite this as:
dy/dx = [tex]x^{4sinx}[/tex] * 4 [(sin x) / x + (cos x)(ln x)]
dy/dx = 4[tex]x^{4sinx}[/tex] [(sin x) / x + (cos x)(ln x)]
Chain rule is the formula used to find the derivative of a composite function. Product rule is used to find derivative of products of two or more functions.
Therefore, the derivative of the function y = [tex]x^{4sin x}[/tex] is dy/dx = 4([tex]x^{4sinx}[/tex])[(sin x) / x + (cos x) (ln x)]
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If you are in the unfortunate event of having a collision with an animal the first thing you should do is:_________
If you are in the unfortunate event of having a collision with an animal the first thing you should do is to slow down the vehicle to a stop along the edge of the road and check whether the other passengers are safe.
Then, according to the Road Traffic Act of 1988, you should report the accident to a nearby police station or Blue cross within 24 Hours.
The next humane thing you can do is to clear it to safe spot away from the road if it is a wild animal and in case of a wild animal and if it is a pet you should call the owner.
Therefore, If you are in the unfortunate event of having a collision with an animal the first thing you should do is to slow down the vehicle to a stop along the edge of the road and check whether the other passengers are safe.
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A point on a standing wave that is always stationary is a(n) _____. antinode maximum minimum node
A point on a standing wave that is always stationary is an antinode.
What is antinode?An antinode is the location where constructive interference of the incoming and reflected waves creates the maximum amplitude of the wave.
Antinodes are points on a stationary wave that oscillate with maximum amplitude.
Nodes are points of zero amplitude and appear to be fixed.
Thus, a point on a standing wave that is always stationary is an antinode.
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A schematic can tell an electrician that the switches are normally
until the sensor senses smoke.
a. locked
b. open
c. closed
d. charged
The correct answer is Option B) Open.
A schematic can tell an electrician that the switches are normally open
until the sensor senses smoke.
What is a schematic diagram?A simple, understandable graphical representation of a plan or model is called a schematic diagram. Simple lines and symbols are used in schematics to convey details like what, how, and where. A schematic diagram's primary role is to highlight circuit components and the relationships between them. Schematics are a very useful tool for troubleshooting since they show which parts are connected in series or parallel and how.
An example of an electrical switch is one that is normally open. A typically open switch remains "off" when it is not compressed. The inside electrical connections are to blame for this. In a typically open switch, the contacts are open when the switch is off. This indicates that the switch is "off" because the electrical connection is damaged.
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When a retailer offers t-shirts in small, medium, large, and x-large, and in 25 colors, the competitive strategy they are using is?
When a retailer offers t-shirts in small, medium, large, and x-large, and in 25 colors, the competitive strategy they are using is Variety
What is competitive strategy ?A business uses a set of rules and practises known as a competitive strategy to acquire a competitive edge in the market. It is the procedure for choosing and carrying out strategies that enable a company to strengthen its position in the market.
This plan was developed after evaluating the opportunities, threats, strengths, and weaknesses of the opposition and contrasting them with your own.Establishing a competitive advantage in the market is the goal of a competitive strategy. Porter's Five Forces Model is the main instrument for assessing an organization's competitive position in the market.Learn more about Competitive strategy here:
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How deep under the surface of a lake would the pressure be double that at the surface?
Answer:
approx 33 ft
Explanation:
One atmosphere of pressure is added per 33 ft of depth
A certain reaction has an activation energy of 43.41 kj/mol. at what kelvin temperature will the reaction proceed 7.50 times faster than it did at 317 k?
The temperature required to increase the reaction rate by 7.50 times will be 332.63 K .
The speed at which a chemical reaction proceeds is known as the reaction rate.
We are given that ,
The activation energy = E = 43.41 kj/mol
Initial temperature = T₁ = 317 k
Therefore we can write as, the temperature at which reaction has 7.50 times faster than at 317 K be T₂ . Then the rate of a reaction increases because the rate constant increases with temperature.
The relation between temperatures, rate constants, and activation energy is given as,
(k₁/k₂) = E/R [(1/T₁ ) - (1/T₂)]
Where, k₁ is rate constant at temperature T₁ and k₂ is rate constant at temperature T₂ & R is gas constant having value 8.314 j/kmol .
Thus putting all the given values in above equation then we get,
7.50k/k = (434100 j/mol)/(8.314j/kmol)[(1/317k) - (1/T₂)]
7.50 = 52213.1344 k [ 0.00315 k⁻¹ - 1/T₂]
1/T₂ = 0.00315 K⁻¹ - (7.50/52213.1344)
T₂ = 332.63 K
Therefore the temperature required to increase the reaction rate by 7.50 times is given as T₂ = 332.63 K
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Amazon delivery boxes are launched from a horizontal conveyor belt moving at a rate of 3 m/s into bins for shipping. If the surface of the conveyor belt is 1.4 m off the ground, what is the range of each Amazon box?
Show some work
The range of each Amazon box that are launched from a horizontal conveyor belt is 1.62 m.
According to equations of motion,
s = ut + 1 / 2 at²
s = Distance
u = Initial velocity
t = Time
a = Acceleration
Since the conveyor belt is at a height of 1.4 m, it has a vertical motion when falling from the conveyer belt.
h = 1 / 2 gt²
1.4 = 1 / 2 * 9.8 * t²
t = √ 0.29
t = 0.54 seconds
The range is the horizontal distance covered,
[tex]d_{x}[/tex] = [tex]V_{x}[/tex] * t
[tex]d_{x}[/tex] = 3 * 0.54
[tex]d_{x}[/tex] = 1.62 m
Therefore, the range of each Amazon box that are launched from a horizontal conveyor belt is 1.62 m.
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A drop in room temperature to 65of that causes the heater to turn on provides an example of a(an):_______
Answer:
stimulus
Explanation:
What is the magnitude and direction of the magnetic flux density b within the air?
Magnetic flux density - It is the force acting per unit current per unit length on a wire placed to magnetic field at right angle.
It is denoted by B
unit of B is tesla (T)
The total no. of magnetic field lines passing through a area is called magnetic flux.
Magnitude of the magnetic flux - It is equal to the area of the surface and having perpendicular direction to the plane of the surface.
Its unit is weber (Wb)
Direction to the magnetic flux density - The direction is north pole to the south pole.
The magnetic field lines are known as lines of magnetic flux.
flux lines are not in direction of force but perpendicular.
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If you have to change the composition of a substance to measure that property, it is a
physical property.
O True
O False
Answer:
False
Explanation:
Physical properties can be measured without changing the composition of the substance. Physical properties of matter include color, hardness, malleability, solubility, electrical conductivity, density, melting point, and boiling point.
However, the chemical properties have to be measured by changing the composition of the substance.
Have a lovely rest of your day! :)
using a(n) researchers can examine the brain's magnetic fields, which help researchers understand how certain tasks influence brain activity based on the speed and strength of the magnetic field.
Magnetoencephalography (MEG) allows researchers to examine the brain's magnetic field. Which helped researchers to understand how certain tasks influence brain activity.
It isn't. Invaluable tool to study the large scale brain activity. And interactions with the body.
MEG was developed in 1960s .
In this technique weak magnetic forces associated with electrical activities of brain are monitored .
It collects activity from neurons visualized as brain waves and it is used with MRI in magnetic source imaging.
Med fields passes through the head without any distortion.
It provides a Spatial and temporal resolution.
Magnetoencephalography (MEG) allows researchers to examine the brain's magnetic field.
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For motion along a straight line it ______ possible for speed to be constant while acceleration is not zero.
For motion along a straight line it NOT possible for speed to be constant while acceleration is not zero.
If the acceleration is not zero means that the speed has changed whether to higher (positive acceleration) or lower (negative acceleration) if the object is slowing down.
When the speed is constant, it means that the velocity at the beginning of the motion and the velocity at the ending of the motion are the same.
What is acceleration?It is a physical quantity that indicates the variation of velocity as a function of time, it is expressed in units of distance per time squared e.g.: m/sec2 ; km/h2
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What would the ratio of deprotonated to protonated histidines be if the phph decreased to 6.40?
The ratio of deprotonated to protonated histidines is [tex]10^{6.4 - pK_{a} }[/tex] : 1
We know that,
pH = p[tex]K_{a}[/tex] + ( log [ [tex]A^{-1}[/tex] ] / [ HA ] )
where,
[ [tex]A^{-1}[/tex] ] represents deprotonated form
[ HA ] represents protonated form
Given that,
pH = 6.4
pH = p[tex]K_{a}[/tex] + ( log [ [tex]A^{-1}[/tex] ] / [ HA ] )
6.4 = p[tex]K_{a}[/tex] + ( log [ [tex]A^{-1}[/tex] ] / [ HA ] )
[ [tex]A^{-1}[/tex] ] / [ HA ] = [tex]10^{6.4 - pK_{a} }[/tex]
The relationship between pH and p[tex]K_{a}[/tex] shown above is known as Henderson-Hasselbach equation
Therefore, the ratio of deprotonated to protonated histidines is [tex]10^{6.4 - pK_{a} }[/tex] : 1
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If an electron is detached from an atom, the atom is converted to a positive ion called a(n):________
If an electron is detached from an atom, the atom is converted to a positive ion called a(n): Cation
Cations are positively charged ions formed when neutral atoms lose electrons. Chemical elements that are cations include:
Alkali metals that lose an electron and form a cation with 1+ charge.The alkali metals of the earth, which lose 2 electrons and form 2+ cation.Aluminum, which loses 3 electrons to form 3+ cation.What is an atom?The atom is the smallest part of the composition of matter, it is indivisible and is composed of a nucleus that has protons and neutrons, and around the nucleus there are the electrons.
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The assumption that the earth moved about the sun in a circle is known as the ___________ model.
Answer:
heliocentrism, a cosmological model in which the Sun is assumed to lie at or near a central point (e.g., of the solar system or of the universe) while the Earth and other bodies revolve around it.
The ball in front of you is going to drop one meter. how long will it take to fall?
The ball will take 0.45 seconds to reach the ground
How will we solve this question?We will use Newton’s laws of motion, so
H= [tex](1/2)gt^2[/tex] taking height= 1m
[tex]1= (1/2) x 9.8 x t^2[/tex]
[tex]t=\sqrt{10/49} = 0.45 seconds[/tex]
What are the three laws of motion given by Newton?The 3 laws of motion given by Newton are as follows:
1) Unless an unbalanced force acts upon it, an item at rest remains at rest, and an object in motion continues to move in a straight line at a constant pace.
2) An object's acceleration is influenced by its mass and the force being applied.
3) Whenever one thing applies force to another, the second object applies the opposing, equal force to the first.
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