Answers
Pressure tells how much force is on an area.
12. The pressure exerted by Earth's atmosphere is air pressure.
13. The density of an object is its mass divided by its volume.
14. A(An) hydraulic device uses fluid to transmit a force.
15. The flow of smoke up a chimney is partly explained by Bernoulli's principle.
True or False questions
16. Water pressure increases as depth increases. True
17. Air pressure is measured using a barometer. True
18. The buoyant force acts in a downward direction. False
19. The buoyant force on an object is equal to the weight of the fluid the object displaces. True
20. Archimedes' principle explains how an airplane flies. False
What is the gravityThe buoyant force is an upward force exerted by a fluid that opposes the weight of a partially or fully immersed object. It is caused by the difference in pressure between the top and bottom of the object. The pressure at the bottom of the object is greater than the pressure at the top because there is more fluid above it pushing down.
The magnitude of the buoyant force is equal to the weight of the fluid displaced by the object. This is known as Archimedes' principle. For example, if you place a ball in a cup of water, the buoyant force on the ball will be equal to the weight of the water that the ball displaces.
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see text below
Completion
Read each word in the box. In each sentence below, fill in the correct word or words. Not all words will be used.
mass
Bernoulli's principle
force
air pressure
gravity
hydraulic device
11. Pressure tells how much ---is on an area.
12. The pressure exerted by Earth's atmosphere is -----------
13. The density of an object is its ------------divided by its volume.
14. A(An) ----------uses fluid to transmit a force.
15. The flow of smoke up a chimney is partly explained by -----
True or False
If a statement is true, write true. If it is false, write false.
16. Water pressure increases as depth increases.
17. Air pressure is measured using a barometer. 18. The buoyant force acts in a downward direction.
19. The buoyant force on an object is equal to the weight of the fluid the object displaces.
20. Archimedes' principle explains how an airplane flies.
Related Questions
PLEASE HELP!!
As a 15.1-gram sample of a metal absorbs 48.75 J of heat, its temperature increases 25.0K. What is the specific heat capacity of the metal?
A) 0.129 J/gK B) 1.95 J/gK C) 3.23 J/gK D) 7.74 J/gK
Answers
m(metal) = 15,1 g.
Q = 48,75 J.
ΔT = 25 K.
Q = C · ΔT · m(metal).
C = Q ÷ ΔT · m(metal).
C = 48,75 J ÷ 25 K · 15,1 g.
C = 0,129 J/g·K.
As a 15.1-gram sample of a metal absorbs 48.75 J of heat, its temperature increases 25.0K. [tex]0.129 \frac{\mathrm{J}}{\mathrm{g} \mathrm{K}}[/tex] is the specific heat capacity of the metal
Answer: Option A
Explanation:
Specific heat term explains the amount of heat needs to be added with unit mass in order to increase the temperature by a degree Celsius. Its formula is given by,
[tex]Q=m \times c \times \Delta T[/tex]
Where,
[tex]\Delta T=\text { final } T-\text {initial} T=25.0 \mathrm{K}[/tex]
[tex]Q \text { is the heat energy in Joules }=48.75 \text { Joules }[/tex]
[tex]c \text { is the specific heat capacity }[/tex]
[tex]m \text { is the mass of the metal }[/tex]
Plugging in the values
[tex]c=\frac{Q}{m \times \Delta T}=\frac{48.75 \mathrm{J}}{15.1 \mathrm{g} \times 25.0 \mathrm{K}}=\frac{48.75 \mathrm{J}}{377.5 \mathrm{g} \mathrm{K}}=0.129 \frac{\mathrm{J}}{\mathrm{g} \mathrm{K}}(\text { Answer })[/tex]
Why doesn't peppermint improve your reaction?
Answers
Peppermint in many forms such as tea, candy, and oil can be used to help improve mental awareness. The menthol “stimulates the Hippocampus area of the brain which controls mental clarity and memory. The odor triggers you to wake up and pay attention.” This explains why many people believe that peppermint makes you smarter, when really it makes you more alert.
Peppermint also has the ability to improve athletic performance as well as helping to improve reaction times.
Overall, peppermint can improve your mental awareness but, no, it does not actually make you smarter.
Which of the following use of chemicals is correct? URGENT QUESTION
A. Window cleaner is used to clean a food contact surface
B. Chemicals are used at double the recommended strength for dificult to clean items.
C. Concentrated degreaser is stored in a chemical storage cabinet.
D. A spray bottle used to water plants is unlabeled.
Answers
The correct use of chemicals from the options provided is that a concentrated degreaser needs to be stored in a chemical storage cabinet. This is to ensure safety and prevent contamination or accidents. The correct option is C.
The correct use of chemicals, particularly in settings where food is handled, is crucial for health and safety. Among the options provided:
Window cleaner is not suitable for use on food contact surfaces due to its chemical composition, which may not be food safe.Using chemicals at double the recommended strength can be dangerous and is not advisable as it may lead to harmful residues or reactions.Concentrated degreaser should indeed be stored in a chemical storage cabinet to prevent accidents and contamination.An unlabeled spray bottle, especially one used to water plants, represents a risk as it may lead to confusion and misuse.Therefore, the correct use of chemicals is represented by option C: Concentrated degreaser is stored in a chemical storage cabinet. This practice ensures that hazardous substances are kept in a safe location and reduces the risk of accidental injury or contamination.
what are two physical changes that could occur with a piece of paper?
Answers
Which kind of diagram shows changes in the three kinds of rocks over time? A. rock cycle B. stratification process C. crystallization rate D. temperature change
Answers
Answer:
A. rock cycle
Explanation:
Rock cycle shows the changes in the three kinds of rocks over time.
The rock cycle refers to the description of the geological processes that rocks go through to become igneous, sedimentary and metamorphic.
The cycle shows the time it takes for the different types of rocks to form and how this change is related to the water cycle and the way the tectonic plates move.
The rock cycle begins with the formation of igneous rock as the first stage.Igneous rocks can form when magma penetrates through cracks in existing rocks or by cooling lava from volcanic eruptions.
The formation of sedimentary rock as a second stage.Sedimentary rocks are formed by the consolidation of sediments that come from erosion.
That is, igneous rocks undergo different processes such as erosion, transport and weathering, which causes the rock to transform into small particles (sediments).
Over time, they are transformed due to the weight of the successive layers deposited and the action of water, forming rocks by a process called lithification.
The formation of metamorphic rock as a third stage.The metamorphic rocks suppose the alteration in solid state of rocks that are already consolidated in the earth's crust.
That is, sedimentary rocks are affected by the movement of the earth's crust related to the movement of tectonic plates and the formation of mountains.
Therefore, we can conclude that rock cycle shows the changes in the three kinds of rocks over time.
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Many dinosaur bones are radioactive. Because of this, they are usually painted over with lead paint. Postulate A reason for why some of these very old fossils would have a radioactive signal and where it might be coming from?
Answers
Terrlel uses a microscope to look t slides of plant cells. he sees a cell with two nuclei that have visible chromosomes. which stage of cell division is this cell?
Answers
Plants perform photosynthesis and respiration. Dead plants are broken down and become part of the soil. Which of the following matter do plants help to cycle through ecosystems? Select one:
a. carbon only
b. carbon, oxygen, and nitrogen only
c. carbon and oxygen only d. carbon, oxygen, nitrogen, and water
Answers
D <<<==== answer.
Final answer:
The correct answer is "carbon, oxygen, nitrogen, and water". Plants are essential in cycling carbon, oxygen, nitrogen, and water through ecosystems via processes like photosynthesis, respiration, transpiration, and interactions with nitrogen-fixing bacteria.
Explanation:
Plants play a crucial role in cycling matter through ecosystems by participating in several biogeochemical cycles. During the photosynthesis process, they absorb carbon dioxide from the atmosphere and release oxygen, which is essential for the survival of most living organisms. Meanwhile, respiration in plants, animals, and decomposers returns carbon dioxide to the atmosphere. Plants are also involved in the water cycle through transpiration, and in the nitrogen cycle, through nitrogen-fixing bacteria that reside in the roots of certain plants like legumes. Therefore, plants help to cycle carbon, oxygen, nitrogen, and water through ecosystems.
what model is used to show the pattern of traits that are passed from one generation to the next in family
Answers
what is the part of a solution that dissolves called
Answers
The equation 24x2+25x−47ax−2=−8x−3−53ax−2 is true for all values of x≠2a, where a is a constant.
What is the value of a?
A) -16
B) -3
C) 3
D) 16
Answers
The number of seats in the first 12 rows of a high school auditorium form an arithmetic sequence the first row has 9 seats the second row has 11 seats.
a) write a recursive formula to represent the sequence
b) write an explicit formula to represent the sequence.
c) how many seats are in the 12th row.
plz help me ASAP it's a math question not chemistry
Answers
S1 = 9
S(n) = S (n-1) +2
b) Explicit formula; is that of an arithmetic progression; such that if a is the first term , and d is the common difference , then the n th term will be given by the formula: a + (n-1) d; where a is 9, and d is 2
Hence; for n th row = 9+ 2(n-1)
c) Number of seats in 12 th row using the formula in b.
n = 12 , a = 9, d = 2
therefore; 9 + 2(12-1)
= 9 + 2(11)
= 31 seats
There are 31 seats in the 12th row.
a) The first question is to obtain the recursive formula so we will have;
S1 = 9
S(n) = S (n-1) +2
b) To obtain the explicit formula of the arithmetic progression
Where;
a= first term
d =common difference
It then follows that the n th term is given by a + (n-1) d
So;
a = 9, and
d= 2
For n th row = 9+ 2(n-1)
c)the number of seats in 12 th row can be obtained by;
9 + 2(12-1)
= 9 + 2(11)
= 31 seats
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Table salt is the compound sodium chloride (NaCl). Use the periodic table to find the molar mass of NaCl
Answers
atomic mass:
Na = 22.98 a.m.u
Cl = 35.45 a.m.u
Therefore:
NaCl = 22.98 * 1 + 35.45 * 1
NaCl = 22.98 + 35.45
NaCl = 58.43 g/mol
hope this helps!
the answer to this question is 58.44
Will mark as Brainliest.
For the balanced equation shown below, how many moles of O2 will react with 0.3020 moles of CO2?
2C2 H5 OH + 6O2 → 4CO2 + 6H2O
Question options:
0.151 moles O2
0.201 moles O2
0.302 moles O2
0.453 moles O2
Answers
what statement best descrubes sulfuric acid (H2SO4).
A. sulfuric acid is a compound.
B. sulfuric acid is a mixture.
C. sulfuric acid is an element.
D. sulfuric acid is a suspension.
Answers
Rainwater will enter the ground at x if the ground is a) saturated and permeable
B) saturated and impermeable
C) unsaturated and permeable
D) unsaturated and impermeable
Answers
Final answer:
Rainwater enters the ground effectively when the soil is unsaturated and permeable, allowing the infiltration and percolation process to replenish groundwater sources.
Explanation:
The question 'Rainwater will enter the ground at x if the ground is a) saturated and permeable b) saturated and impermeable c) unsaturated and permeable d) unsaturated and impermeable' pertains to the concepts of groundwater recharge, infiltration, and the nature of soil permeability. Rainwater enters the ground through a process known as infiltration, which is significantly influenced by the soil's saturation level and its permeability. In this context, option C: unsaturated and permeable is the correct answer. This is because unsaturated soil indicates that there is room for more water in the soil's pore space, and permeability means the soil has pathways through which rainwater can move. When soil is unsaturated and permeable, it allows for effective infiltration and percolation of rainwater into deeper layers, eventually replenishing groundwater sources.
If I add 475mL of water to 75.0mL of a 0.315M NaOH solution, what will the molarity of the diluted solution be?
Answers
V(NaOH) = 75 mL ÷ 1000 mL/L = 0,075 L.
c(NaOH) = 0,315 M = 0,315 mol/L.
n(NaOH) = c(NaOH) · V(NaOH).
n(NaOH) = 0,075 L · 0,315 mol/L.
n(NaOH) = 0,023625 mol.
V(solution) = 0,475 L + 0,75 L.
c(solution) = 0,023625 mol ÷ 0,550 L.
c(solution) = 0,043 mol/L.
How is a watershed related to a river system
Answers
Answer:
The stream mouth is where a waterway streams into a bigger waterway, for example, another stream, a lake, or a sea. A watershed limit, likewise called a seepage isolate, marks the external most point of confinement of a watershed. A watershed is a tract of land depleted by a waterway and its tributaries.
A watershed, or a drainage basin, captures all the water from rain or snow fall, and directs it into a river or stream. A river system includes a main river and its tributaries. Together, the watershed and the river system form part of the hydrologic cycle, where a watershed feeds the river system, contributing to the overall flow of water on the earth's surface.
Explanation:A watershed is closely related to a river system as they are both integral parts of the hydrological cycle. A watershed, also known as a drainage basin, refers to an area of land where all of the water that falls as precipitation either drains off into the same place, typically a river, lake, or ocean. It captures the rainfall and snow melt and directs it into a single point, say a river or a stream.
On the other hand, a river system includes a river channel along with its tributaries (smaller streams or rivers that flow into the main river). The river system serves as the main transportation route of the water from the watershed. So, a watershed feeds a river system and together they contribute to the overall flow of water on earth's surface. For instance, the Amazon River system is fed by multiple small and large watersheds covering a large area of South America.
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hen car tires are on hot pavement for too long, the pressure inside will ___________ and the volume within the tire will _____________.
Answers
At 685 mmHg pressure and 50°C, a gas has a volume of 5.35 L. If the volume of the container decreases to 1.25 L, what is the amount of the pressure change?
Answers
Answer:
The amount of the pressure change is 2,246.8 mmHg.
Explanation:
In order to determine change in pressure we have to find the pressure of the gas when it occupied 1.25 L of volume.
So,to calculate the new pressure, we use the equation given by Boyle's law.
This law states that pressure is directly proportional to the volume of the gas at constant temperature.
The equation given by this law is:
[tex]P_1V_1=P_2V_2[/tex] (at constant temperature)
where,
[tex]P_1\text{ and }V_1[/tex] are initial pressure and volume.
[tex]P_2\text{ and }V_2[/tex] are final pressure and volume.
We are given:
[tex]P_1=685 mmHg\\V_1=5.35 L\\P_2=?\\V_2=1.25 L[/tex]
Putting values in above equation, we get:
[tex]685 mmHg\times 5.35 L=P_2\times 1.25 L[/tex]
[tex]P_2=\frac{685 mmHg\times 5.35 L}{1.25 L}=2931.8 mmHg[/tex]
The amount of the pressure change = [tex]P_2-P_1[/tex]
[tex]P_1-P_2=2931.8 mmHg-685 mmHg=2,246.8 mmHg[/tex]
which is a scientific claim? At least 75 percent of the class will pass the physical science test today because they studied more than two hours for it. According to the star of the number-one teen TV show, crushed rosemary and olive oil spread over pimples will draw out the bacteria and prevent scarring. Plants fertilized once per week with Super Plant Food Formula have been shown in testing to produce twice as much fruit as plants that are not. Placing half-filled one-gallon jugs of water out on the lawn prevents moles from occupying the space underground.
Answers
That answer is the most scientific because it states the word "testing" and in science they do a bunch of test to make a scientific claim.
How many moles of propane (C3H8) are in a 7.00-L tank at 20.0°C and 5.45 atm of pressure?
Answers
Temperature in kelvin :
20.0ºC + 273 => 293 K
R = 0.082
Volume =7.00 L
Pressure = 5.45 atm
Number of moles = ??
Therefe:
P * V = n * R * T
5.45 * 7.00 = n * 0.082 * 293
38.15 = n * 24,026
n = 38.15 / 24.026
n = 1.587 moles of propane ( C3H8 )
hope this helps!
the amount of propane in the tank at the given temperature and pressure is 1.59moles.
Given the data in the question;
Volume of tank; [tex]V = 7.00L[/tex]Temperature; [tex]T = 20.0^oC = 293.15K[/tex]Pressure; [tex]P = 5.45atm[/tex]Amount of propane; [tex]n = \ ?[/tex]Ideal Gas LawThe Ideal gas law states "that pressure multiplied by volume is equal to moles multiply by the universal gas constant multiply by temperature. It is expressed;
[tex]PV = nRT[/tex]
Where P is pressure, V is volume, n is the amount of substance, T is temperature and R is the ideal gas constant ( [tex]R = 0.08206Latm/molK[/tex] ).
The determine the amount of propane in the tank, we substitute our given values into the equation above.
[tex]PV = nRT\\\\5.45atm * 7.00L = n * 0.08206Latm/molK * 293.15K\\\\38.15Latm = n * 24.055889Latm/mol\\\\n = \frac{38.15Latm}{24.055889Latm/mol}\\ \\n = 1.59moles[/tex]
Therefore, the amount of propane in the tank at the given temperature and pressure is 1.59moles.
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How does gravity keep the planets in orbit around the sun
Answers
Gravity from the sun is even and makes a planet orbit the sun by exerting a force that pulls the planet towards it. Since the gravity of the sun is always the same (or very, very similar), the planet's orbit stays the same.
Hope this helps!
What is the chemical formula of this organic compound
Answers
How much heat is required to change the temperature of a 15 g aluminum can with 100 g of water from 24.5°C to 55°C?
Answers
While heat capacity of water = 4.186 J/g°C
Heat = heat gained by water + heat gained by aluminium
Heat gained by water = 100 × 4.186 × 30.5
= 12767.3 Joules
Heat gained by aluminium = 15 × 0.9 × 30.5
= 411.75 Joules
Heat required = 13179.05 Joules or 13.179 kJoules
What needs to be added to liquid water at the Earth's surface in order to evaporate it into gaseous water
Answers
Answer: Yes heat is correct.
Explanation:
Calculate the hydrogen-ion concentration [H+] for the aqueous solution in which [OH–] is 1 x 10–11 mol/L. Is this solution acididc, basic, or neutral? Show your work. (3 points)
Answers
kw= 1 x10^-14
OH-= 1 x10 ^-11
(H+)= KW / OH-
concentration of H+ = (1x10^-14) /.(1 x 10 ^-11) = 1 x10 ^-3
Ph= -log (H+)
PH=-log ( 1 x 10 ^-3) = 3 therefore the solution is acidic since the PH less than 7
Helpz mez plzz pwzzzzz
Answers
The 2004 Indian Ocean tsunami was caused by a major earthquake that originated below the earthquake epicenter, which is the point on the ocean's surface directly above the earthquake focus. The dashed lines on the map indicate the path of the tsunami's waves.
The correct answer is option C.
On December 26, 2004, a major earthquake occurred in the Indian Ocean, triggering a tsunami that resulted in the loss of thousands of lives. The earthquake originated below the earthquake epicenter, which is the point on the ocean's surface directly above the earthquake focus. The dashed lines on the map indicate the path of the tsunami's waves.
The earthquake epicenter is important because it is the point on the ocean's surface where the tsunami waves are generated. The waves radiate outward from the epicenter in all directions, with the largest waves occurring closest to the epicenter. The waves then travel across the ocean, decreasing in height as they move away from the epicenter.
The 2004 Indian Ocean tsunami was one of the deadliest tsunamis in recorded history, with an estimated 230,000 people killed. The tsunami waves reached heights of up to 30 meters (100 feet) in some areas, and caused widespread damage to coastal communities.
The 2004 tsunami was a reminder of the destructive power of tsunamis. It is important to be aware of the risks associated with tsunamis and to know what to do if a tsunami warning is issued.
Therefore, from the given options the correct one is C.
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Why might a rubber raft burst if it is left in the sun on a summer day?
Answers
Answer: This is because of increase in air pressure inside the rubber raft.
Explanation:
According to Gay-Lussac's Law: 'The pressure of the gas at constant volume is directly proportional to the temperature in Kelvins'.
[tex]Pressure\propto Temperature[/tex](at constant Volume)
or [tex]\frac{Pressure}{Temperature}=constant[/tex]
So, when we left rubber raft in a sun on a summer day temperature of the air inside the rubber raft increases due to which pressure of an air inside the rubber raft also increases. And by this increase in pressure rubber raft bursts.
The BEST example of diffraction is the image of
Question 8 options:
a ring around the Sun caused by particles in the air.
a pencil that appears broken in a glass of water.
a fingerprint that appears to be enlarged under a magnifying glass.
your image in a mirror