The gas flow speed in a pipeline with a diameter of 0.250 m delivering 1.55 m³ of gas per second is approximately 31.56 m/s.
Explanation:The question asks for the flow speed of the gas in a natural-gas pipeline with a specific diameter, which can be calculated through the continuity equation used in fluid dynamics. This equation states that the volume flow rate (Q) is equal to the velocity of the flow (v) times the cross-sectional area of the pipe (A). Therefore, we can rearrange the equation to find the velocity as V = Q/A.
The cross-sectional area A of the pipeline can be calculated using the formula for the area of a circle since the pipe is essentially a circular cylinder: A = πr², where r is the radius of the pipeline. Given the pipeline diameter of 0.250 m, the radius is half this value or 0.125 m. Substituting this into the area formula gives A = π*(0.125 m)² = 0.0491 m².
Finally, we can find the flow speed by dividing the given volume flow rate (1.55 m³/s) by the calculated cross-sectional area: V = Q/A = 1.55 m³/s/0.0491 m² = 31.56 m/s. So, the gas flow speed in the pipeline is approximately 31.56 meters per second.
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which of the following ideas provided an important step toward a more complete understanding of blackbody radiation?
Answer:
Light is composed of discrete chunks that must be absorbed as units
Explanation:
which of the following discoveries can be directly attributed to the use of imaging radar
Final answer:
Imaging radar has enabled the monitoring of flood extents, improved aircraft detection via Doppler technology, and contributed significantly to space exploration by mapping celestial bodies.
Explanation:
The use of imaging radar has led to several significant discoveries. One such discovery is the ability to monitor flood extents under any weather condition, as demonstrated by data from the European Resource Satellite (ERS-1), which clearly depicted the smooth surface of a flooded Mississippi River deflecting radio signals away while the surrounding rougher land reflected them. Additionally, the Doppler radar technology has enabled the differentiation of aircraft from ground echoes by leveraging the Doppler shift, significantly improving aerial detection systems. Beyond aviation and weather forecasting, radar has been instrumental in space exploration, determining distances to planets, rotation periods of Venus and Mercury, and mapping the terrain of various celestial bodies with high resolution.
Which statement is true? A) All waves travel at the same speed through any medium. B) All waves travel at the same speed if no medium is present. C) Electromagnetic waves require a medium, but mechanical waves do not. D) Mechanical waves require a medium, but electromagnetic waves do not. Eliminate
An electron with a kinetic energy of 3.90 ev collides with a sodium atom.
A man pulls on his dog's leash to keep him from running after a bicycle. Which term best describes this example? Select one: A. negative work B. positive work C. negative force D. positive force
Answer:negative work
Explanation:
This is right
which statement best describes Gay-Lassac’s law
Gay-Lussac's law states that the pressure of a given amount of gas is directly proportional to its temperature on the Kelvin scale, provided the volume is constant. This was initially discovered by Guillaume Amontons and later refined by Joseph Louis Gay-Lussac. The mathematical representation is P proportional to T, P = constant × T or P = kx T.
Explanation:The best description of Gay-Lussac's law is that it states that the pressure of a given amount of gas is directly proportional to its temperature on the Kelvin scale when the volume is held constant. Guillaume Amontons was the first to empirically establish this relationship between pressure and temperature of a gas around 1700, and Joseph Louis Gay-Lussac defined the relationship more accurately around 1800. This relationship is expressed mathematically as PxT or P = constant × T or P = kx T.
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A car travels straight for 20 miles on a road that is 30 degrees north of east what is the east component of the cars displacement to the nearest tenth of a mile
is it possibke to start with 25g of reactants and end with 35g of products?why or why not?
Which of the following best describes acceleration
A. S/M
B. M/S
C. M2
D. M/S2
Why is the reactor coolant water kept contained within the primary loop instead of allowing it to mix with the feed water and leave through the cooling tower? it is contaminated and radio active?
Answer:
Yes, It is contaminated and radio active
Explanation:
The coolant in the primary loop is actually in contact with the reactor fuel. So it will have some trace amount of the reactor fuel and all the other radioactive by products like cobalt.
Also the neutrons in the reactor will convert the hydrogen in the water into radioactive tritium. and the oxygen into radioactive nitrogen.
This is why the primary loop water is kept isolated from the feed water.
1.The question below refers to the following graph.
What is the approximate period of this wave?
15 centimeters
15 seconds
10 seconds
5 seconds
2. The question below refers to the following graph.
What is the wavelength of this wave?
10 cm
15 cm
60 cm
cannot be determined
3. The question below refers to the following graph.
What is the frequency of this wave?
1 wave/sec
10 waves/sec
0.1 wave/sec
cannot be determined
1. 10sec
2. Can not be determined
3. 0.1wave/sec
Answer :
(1) T = 10 seconds
(2) Wavelength cannot be determined.
(3) Frequency, [tex]\nu=0.1\ waves/sec[/tex]
Explanation :
(1) From the given graph :
Time period of the wave is defined as the time taken by it to complete one cycle.
So, the period of this wave is (C) " 10 seconds".
(2) The distance between two consecutive crest or the trough is called the wavelength of the wave.
From the graph it is clear that the distance between two consecutive crests is 10 cm(see attached figure).
So, the correct option is (a) "10 cm".
(3) As the time period of the wave is 10 seconds.
So, [tex]f=\dfrac{1}{T}[/tex]
[tex]f=\dfrac{1}{10\ s}\ waves/sec[/tex]
[tex]f=0.1\ waves/sec[/tex]
So, the correct option is (c) " 0.1 wave/sec ".
If energy is absorbed because chemical reaction is ______.
A. a product
B. limiting
C. exothermic
D. endothermic
I MARK BRAINLIEST, PLEASE HELP, THANKS IN ADVANCE! :))
The reaction is D. endothermic.
Explanation:Absorption or need of energy from surroundings is called endothermic process. Heat is the major common form of energy which is absorbed in this process. In this process, enthaply of reactant is less than the product.
For example, an ice cube placed in the hand for some time starts to melt and it takes energy in the form of heat from the hand. This process always requires energy because of the breaking of existing and formation of new chemical bonds.
The air in a cool region underneath cloud cover will have _____ a region with no cloud cover.
Answer:
The air is a homogeneous mixture of gases that make up the Earth's atmosphere, which remain around the planet by the attraction force of gravity.
Its properties changes with the altitude, the pressure, the temperature and the density. For example, there is a relation that is inversely proportional between the temperature and the air density.
When the temperature decreases the density increases.
Therefore, the air in a cool region of the atmosphere will be denser than the air in a hot region of the atmosphere.
In other words:
The air in a cool region underneath cloud cover will have a higher density than a region with no cloud cover
Two people are pushing on a desk to the right with a force 15n each what is the net force on the desk
Which formula represents Charles’s law? P1V1 = P2V2 V1T1 = V2T2
Charles's law formula describes a direct relationship between the volume and absolute temperature of a gas at constant pressure. The formula is V1/T1 = V2/T2. It explains why gas contracts or expands with temperature changes.
Explanation:The formula for Charles's law describes a direct relationship between the volume and absolute temperature (measured in Kelvin) of an ideal gas, provided the pressure remains constant. The formula is V1/T1 = V2/T2 where V1 and V2 are the initial and final volumes and T1 and T2 are the initial and final temperatures.
For example, if you have a gas in a balloon at room temperature (say, 300 Kelvin), and the balloon is inflated to a certain volume, if you then cool the gas to half the initial temperature (150 Kelvin), the volume of the gas (balloon) will also contract to half of its initial volume. This is the principle of Charles's law, showing a direct temperature-volume relationship in gases.
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Charles's Law is represented by the formula V₁/T₁ = V₂/T₂, which shows the relationship between the volume and temperature of a gas at constant pressure.
Charles's Law describes the relationship between the volume and temperature of a gas at constant pressure. According to this law, the volume of a gas is directly proportional to its temperature when pressure remains constant. When represented as mathematical formula the Charles's Law is:
V₁/T₁ = V₂/T₂
Here, V₁ and T₁ represent the initial volume and temperature of the gas, while V₂ and T₂ represent the final volume and temperature of the gas.
Complete Question
Which of the following formulas best describes Charles's law? V₁/T₁ = V₂/T₂ , P₁V₁ = P₂V₂ , P₁V₁/P₂V₂ , P₁/T₁ = P₂/T₂
*a small object with a momentum of 6 kg∙m/s to the west approaches head-on a large object at rest. the small object bounces straight back with a momentum of 5 kg∙m/s. what is the change in the momentum of the small object? what is the impulse exerted on the small ball? what is the impulse exerted on the large object?
The impulse exerted on the large object will be [tex]J=11\ kg\frac{m}{s}[/tex]
what will be the impulse?1) The change in the momentum of the small object is given by the difference between its final momentum and its initial momentum:
[tex]\Delta p=(p_f-p_i)[/tex]
where [tex]p_f\ \ p_i[/tex] are the final and initial momentum of the small object. Substituting the numbers of the problem, we find
[tex]\Delta p=-5-6=-11\ \frac{kgm}{s}[/tex]
where we put a negative sign in front of pf because the direction of the object after the collision is opposed to its initial direction.
2) The impulse is equal to the product between the force applied to an object and the time interval:
[tex]J=F\times \Delta t[/tex] (1)
since the force is the product between the mass and the acceration: F=ma, and the acceleration is equal to the change in velocity divided by the time, we can rewrite (1) as
[tex]J=F\times \Delta t=ma\Delta t=mv\frac{\Delta t}{\Delta t}=mv=\Delta p[/tex]
So, the impulse is equal to the variation of momentum. Therefore, the impulse exerted on the small object is
[tex]J=\Delta p=-11\ \frac{kgm}{s}[/tex]
3) We have to find the final momentum of the large object. Initially, its momentum is zero, because it is at rest. Using the law of conservation of momentum,
[tex]p_i+0=p_f+P_f[/tex]
where are the final and initial momentum of the small object, while is the final momentum of the large object. By substituting the numbers we had before:
[tex]P_f=p_i-p_f=6-(-5)=11\ \frac{kgm}{s}[/tex]
So, the impulse exerted on the large object is equal to its variation of momentum:
[tex]\Delta p=P_f-p_i=11-0=11\ \frac{kgm}{s}[/tex]
Hence the impulse exerted on the large object will be [tex]J=11\ kg\frac{m}{s}[/tex]
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Which of the following are disadvantages of solar energy? Check all that apply. A. It contributes to global warming. B. It is expensive. C. It is not equally effective for all areas of the world. D. It is not effective at all times of day.
Which of the following are more reactive than tin?
Check all that apply.
A. Gold
B. Calcium
C. Aluminum
D. Copper
pick more than one it multiple answer
B and C are right for apex!!
The headlights of a typical truck are powered by a 12 V battery. What current do they draw if the resistance is 4.8 ohms?
The headlights of a typical truck are powered by a 12 V battery, then the current they draw if the resistance is 4.8 ohms would be 2.5 Ampere.
What is resistance?Resistance is the obstruction of electrons in an electrically conducting material.
V=IR
As given in the problem, the headlights of a typical truck are powered by a 12 V battery, the find out the current drawn if the resistance is 4.8 ohms.
By using Ohm's Law,
The voltage of the battery = 12 volt
The resistance of the resistor = 4.8 Ohm
V = I × R
12 = I × 4.8
I = 12 / 4.8
I = 2.5 Ampere
Thus, If the headlights of a typical truck are powered by a 12 V battery, then the current they draw if the resistance is 4.8 ohms would be 2.5 Ampere.
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When light waves strike a blue object, what happens to the light waves of all colors except blue?
Answer:
All colors are absorbed by the object except blue color.
Explanation:
When a white beam of light any object the light beam gets dispersed in its constituent colors. The object reflect a single color and absorb all remaining colors. So the object appears of the color which is reflected by object.
When the light beam strikes the blue object it gets dispersed in its constituent colors. All the colors are absorbed by the object except blue color. Blue color is reflected by the object.
Thus, the object appears of blue color.
What forms of energy are involved when snow on a mountain breaks loose, resulting in an avalanche?
During an avalanche, the ___energy of the snow on the mountain is converted into ___ energy as the snow cascades down.
Drop down one: Elastic
Kinetic
Potential
Radiant
Drop down two: Chemical
Kinetic
Nuclear
Potential
A forklift lifts 5 boxes from the ground to a height of 2 meters (m). The boxes push down with a force of 1000 newtons (N). How much work was done by the forklift to lift the boxes?
50 POINTS!! I'M BEING TIMED, PLEASE HURRY!!
A box is sitting on the floor. It is then pulled with a force, Ft. The free-body diagram of the box is shown. Which describes the motion of the box? It is moving up with a net force of 20 N. It is moving to the right with a net force of 10 N. It is in dynamic equilibrium with a net force of 0 N. It is in static equilibrium with a net force of 0 N.
Without the skeletal system, the body could not fight off infection. Please select the best answer from the choices provided. T F
Answer:
TRUE
Explanation:
got it right on edge 2022.
The statement Without the skeletal system, the body could not fight off infection is false.
The skeletal system provides support, protection, and movement for the body, and it also plays a role in the production of blood cells through bone marrow. However, the primary function of fighting off infections is carried out by the immune system, which includes the lymphatic system, the spleen, the thymus, and bone marrow, among other components. While bone marrow is part of the skeletal system and is crucial for producing immune cells, the skeletal system itself is not the sole or primary defense against infection. Therefore, the statement is incorrect because it overstates the role of the skeletal system in immune function. The immune system, not the skeletal system, is specialized to fight off infections
Which of these is MOST LIKELY to cause natural pollution?
Answer:
volcano
Explanation:
the ash and stuff pollutes the air
Which changes in an electric motor will make the motor stronger? Check all that apply.
To strengthen an electric motor, increase the number of coils, enhance the magnetic field's strength, and optimize the commutation process.
Explanation:To make an electric motor stronger, several changes can be implemented. Increasing the number of coils in the motor will increase the torque, as the magnetic force exerted on each coil contributes to the overall twisting force on the motor's shaft. Enhancing the strength of the magnetic field within the motor, either by using stronger magnets or by increasing the current that produces the magnetic field, can also lead to a more powerful motor. Finally, ensuring the efficiency of the commutation process - the timing of the current's reversal to maintain continuous torque - is also crucial for motor strength. Factors such as the precise adjustment of commutators and brushes can minimize energy loss and improve performance.
Ron hits his golf ball but is disappointed when it doesn't follow the course to the left. what does newton's first law of motion say about the travel of an object?
a.every action has an equal and opposite reaction applies.
b.inertia accelerates due to the unbalanced forces present.
c.an object at rest will move when external force is applied.
d.it will travel in a straight path unless changed by an external force. eliminate
Answer: the answer is D if you do t wanna read all that
Which of the following is an example of a safe laboratory produced?
A) eating or drinking from laboratory glasware
B) Tying back long hair and lose clothing
C) testing an odor by directly inhaling the vapor
D) touching hot objects with your bare hands
photoelectric effect definition
Briefly describe the three intelligences included in Robert Sternberg’s triarchic theory of human intelligence.
Answer:
Responses may vary but should include some or all of the following information: Sternberg’s theory of intelligence includes analytical, practical, and creative intelligence. Analytical intelligence is the type of intelligence used to problem solve. It involves abstract reasoning ability and evaluation skills. Practical intelligence is the type of intelligence that involves the ability to understand everyday tasks and how efficient one is in adapting to the surrounding environment. Creative intelligence is the type of intelligence that involves the ability to react to novel situations or stimuli.
Explanation:
hope this helped! ^-^
Robert Sternberg's triarchic theory includes analytical intelligence (problem-solving, analysis), creative intelligence (creating, imagining), and practical intelligence (application of knowledge in day-to-day situations).
Explanation:Robert Sternberg's triarchic theory of human intelligence consists of three types or categories: analytical intelligence, creative intelligence, and practical intelligence. Analytical intelligence relates to problem-solving and the analytical evaluation of information. For example, answering a multiple-choice quiz requires analytical intelligence. Creative intelligence involves creating, designing, imagining, or supposing. A student using creative intelligence might generate innovative ideas for a school project. Practical intelligence pertains to the application of intellectual skills in everyday contexts. One might use practical intelligence when navigating a social situation or solving real-world problems.
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