Answers
Answer:
22. C. Pz > Py > Px
23. B. 5.0 × 10⁴Pa
24. B. Upward thrust exerted by the liquid
25. B. The volume of the object immersed in the liquid decreases
26. D. When a body is wholly or partially immersed it experiences upthrust equal to the weight of the fluid displaced
Explanation:
22. The more you go deeper into the sea, the more the pressure of the water increases pushing down on you.
The reason why salt water is very dense is that when the salt dissolves in the water, it adds to the mass of the water, which makes the water more denser.
Due to this, we can assume that the water pressure exerted on the fish will be greater beneath the sea than the lake at the same depth.
Answer: C. Pz > Py > Px
----------------------------------------------------------------------------------------------------------
23.
Given:
Density of water = 1000 kg m⁻³
Atmospheric pressure at sea level, Patm = 1.0 × 10⁵ Pa]
Depth of water in sea = 5m
To find the pressure exerted by the water on the fish, we use the formula: P = hpg
P = pressure
h = height or depth of water
p = density of water
g = gravitational field strength
We are given the depth and density, but not the gravitational field strength
Gravitational Field Strength: Measures how much gravity there is
And since we live on earth, the gravitational field strength is 10 N/kg
Depth, h = 5m
Density, ρ = 1000 kg/m³
Gravitational Field Strength, g = 10 N/kg
Now we substitute these into the formula:
P = hpg
P = (5)(1000)(10)
Multiply 5 and 1000 to get 5000
P = 5000 × 10
Multiply 5000 and 10 to get 50000
P = 50000Pa
↓
P = 5.0 × 10⁴Pa
Answer: B. 5.0 × 10⁴Pa
----------------------------------------------------------------------------------------------------------
24. When a body is fully or partly immersed in a liquid, it undergoes an apparent loss in its weight due to upward thrust exerted by the liquid.
The upward thrust is the same as the weight of the fluid being displaced by an object.
Answer: B. Upward thrust exerted by the liquid
----------------------------------------------------------------------------------------------------------
25.
When you add common salt to water it becomes denser, which can increase the mass and volume of the water. Due to water becoming denser, it can make an object thats less dense float. Also, density and volume are inversely proportional to each other, meaning that when density increases, volume decreases.
Answer: B. The volume of the object immersed in the liquid decreases.
----------------------------------------------------------------------------------------------------------
26.
Achimede's principle states that:
Answer: D. When a body is wholly or partially immersed it experiences upthrust equal to the weight of the fluid displaced.
Related Questions
For brainliest and 100 points
Ben is pushing a small trolley 10 N to the north and but Gary is pushing the trolley 5 N to the south. What is the total applied force on the trolley?
5N
2N
20N
40N
Answers
Answer:
The total applied force on the trolley is 5 N toward the North.
Explanation:
yes
Which of the following can explains convection?
A.Hot air is less dense than cold air.
B.The wind blow takes place from higher position to lower position
C.The particles in hot air are lighter than those in cold air.
D.The gas pressure of hot air is greater than that of cold air.
E.The particles in hot air move quicker than that of cold air.
Answers
Answer:
A) would be the best explanation because hot air is less dense and would rise to the top of a column of air
The worker in the picture is
a.) letting the pulley do all the work
b.) not doing work because he is using a pulley
c.) doing work because he is moving the bale of cotton
d.) transforming mechanical energy to potential energy
Answers
Answer:
the worker is doing work because he is moving the bale of cotton
Two thermometers are calibrated, one in degrees Celsius and the other in degrees Fahrenheit. At what temperature are their readings numerically the same
Answers
Answer:
To change degrees Celsius in degrees Fahrenheit, the formula is:
F = 1.8C +32F=1.8C+3
Explanation:
C = 1.8C +32C=1.8C+32
C = -40C=−40
T=-40+273.15=233.15\ KT=−40+273.15=233.15 K
For pea plants, T represents a dominant allele for tall pea plants and t is the recessive allele for short pea plants. If two plants with the Tt genotype are crossed, what is the probability that offspring will exhibit the dominant trait?
Answers
Answer:
75%(TT,Tt,tt) Hope that helps
What will happen to the period of a ball-on-a-spring if the ball is replaced by a smaller one with half the mass
Answers
When the ball on a spring is replaced by a smaller ball with half the mass : The period decrease by 29%
Calculate the Period
We will apply the formula below to calculate period
T = [tex]2\pi \sqrt{\frac{m}{k } }[/tex]
where :
T₁ / T₂ = [tex]\sqrt{\frac{m_{1} }{m_{2} } }[/tex] where m₂ = m₁ / 2
Therefore :
T₂ = [tex]\frac{T_{1} }{\sqrt{2} }[/tex] = 0.71 T
Hence we can conclude that the period will decrease by 29% ( i.e 100 - 71 ).
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(b) Fig. 7. 2 shows a metal sphere on an insulating support.
C
Fig. 7. 2
A student has available two rods, one charged positively and one charged negatively. Using
one of these rods, she gives the sphere a uniform negative charge by induction
State which rod she chooses, and describe the procedure she follows.
Answers
The rod she chooses, to give the sphere a uniform negative charge by induction is the positively charged rod.
Charging by inductionCharging an object by induction is a process of inducing a charge on the object by bringing another charged object close to it.
Charge on the sphereWhen a positively charged rod is brought near a neutral sphere (equal negative and positive charge), the positive charge of the rod will repel the positive charge of the sphere, leaving the sphere with excess negative charge.
Thus, the rod she chooses, to give the sphere a uniform negative charge by induction is the positively charged rod.
Learn more about charging by induction here: https://brainly.com/question/8418256
Distinguish between infrasonic and ultrasonic sound waves.
Answers
How we could distinguish them is that the infrasonic sounds are the lower limit of human hearing while ultrasonic sound is above human hearing. The sound of frequency more than 20,000Hz are called ultrasonics while the frequency less than 20Hz are called infrasonics.
Explanation:
I hope it helps! Have a great day!
Anygays-
Since many wavelengths of light are measured in nanometers, it's useful to know that planck's constant (h) multiplied with the speed of
light (c) is equal to 1240 eVnm.
This is useful, as E = hf, or otherwise written as E= .
With this information in mind, solve the following:
A photon has 1.6 eV of energy. What is the wavelength of this photon?
O a
410 nm
Ob
775 nm
Ос
1984 nm
Od
306 nm
Answers
Answer:
E = h f and since f = c / λ we have E = h c / λ
Thus λ = h c / E
Also, 1 ev = 1.6E-19 C
λ = 6.63E-34 * 3.0E8 / (1.6 * 1.6E-19)
λ = 6.63 * 3.0 / (1.6 * 1.6) * E-7
λ = 7.77E-7 = 777 nanometers
(B) is correct
Do people actually see me inverted?☹
Answers
Answer:
of course is clear
Explanation:
very clear
When observed from earth, the wavelengths of light emitted by a star are shifted toward the red end of the electromagnetic spectrum. This redshift occurs because the star is:.
Answers
Answer:
When observed from Earth, the wavelengths of light emitted by a star are shifted toward the red end of the electromagnetic spectrum because: the star is moving away from planet Earth.
A star is a giant astronomical or celestial object that contains a luminous sphere of plasma and bounded together by its own gravitational force.
A redshift can be defined as a displacement (shift) of the spectral lines of celestial or astronomical objects toward longer wavelengths (the red end of an electromagnetic spectrum), as a result of the Doppler effect.
Hence, a redshift is considered to be a subtle change in the color of visible electromagnetic radiation from stars (starlight), as observed from planet Earth.
In conclusion, a redshift occur when observing a star from planet Earth because the star is moving away from planet Earth.
Read more: brainly.com/question/17934476
Explanation:
have a great day :)
Please help me with the blanks
Answers
Answer:
wavelength and frequency
Explanation:
wavelength is the distance between waves while frequency is the number of times in which the wave occurs.
Please help answer the following questions ASAP
Answers
Answer:
renewable are fuels that can be reused while non renewable are fuels that can not be used again
15 points!! PLEASE ANSWER! I NEED IT QUICK!
What happens to the energy of a wave if the amplitude of the wave is doubled?
How does the frequency of a wave relate to the energy of the wave?
Answers
Answer:
See below ↓
Explanation:
We know that the energy of a wave is directly proportional to the amplitude of a the wave. That means it directly varies, so when one increases/decreases, the other does the same.
Therefore, when the amplitude of a wave is doubled, the energy of the wave is also doubled.
Similarly, in the case of the frequency of the wave, it is also directly proportional to the energy of the wave.
⇒ E ∝ ν
What are some downsides to fossil fuels? (Select all that apply.)
They release large amounts of carbon dioxide when burned.
They are in a limited supply.
They are expensive to extract compared to other forms of energy.
They do not replenish themselves.
Answers
Answer:
They release large amounts of carbon dioxide when burned.
They are expensive to extract compared to other forms of energy.
They do not replenish themselves
Explanation:
Levi observed properties of three different waves and recorded observations about each one in his chart. which statement is best supported by the table? wave w and y are light waves. wave x is a sound wave. wave w is a light wave. waves x and y are sound waves. waves y is a sound wave. waves x and w are light waves. wave w is a sound wave. waves x and y are light waves.
Answers
For the three different waves observed and recorded, Waves X and Y are light waves. This is further explained below.
What is a wave?Generally, A wave is simply defined as a disturbance that propagates through a medium from one point to another.
In conclusion, Wave Z is impossible to classify, Waves X and Y are light waves, and Wave W is a sound wave.
Read more about Wave
https://brainly.com/question/23271222
Answer:
D
Explanation:
Viewed from a distance, how would a flashing red light appear as it fell into a black hole?.
Answers
Explanation:
Light rays that pass close to the black hole get caught and cannot escape. so what ends up happening to the light is that it starts bending due to the strong gravitational force of the black hole.
Copper (II) chloride reacts with magnesium nitride
Answers
Answer:
I don't know
Explanation:
because I'm not smart
How much work do you do on a 25- kg backpack when you walk a horizontal distance of 100m ?
Answers
Answer:
2,500
Explanation:
A scientist adds different amounts of salt to 5 bottles of water. She then measures how long it takes for the water to boil. What is the responding variable in this experiment? 0 A. The kind of bottles used O B. The brand of salt used O C. The amount of salt added to the water O D. The time it takes for the water to boil
Answers
Answer:
d.the time it takes for the water to boil
Explanation:
it is because salt was added to the water.so the responding variable is the time taken to boil the water
1. What is the approximate age of the fossil described in the activity?
1.8 million years
18 million years
.9 million years
90 million years
Answers
Answer:
B.
Explanation:
It should be B. 18 million years ago.
I apologize if it is incorrect-
I hope it helps! Have a great day!
Anygays-
Answer:
B. 18 million years
Explanation:
The answer is B. 18 million years
I hope it helps! Have a great day!
Muffin ^^
Please Help Physics!
1. Sound travels through a guitar string at 600 m/s, making a sound wave in the air with a speed of 333 m/s. In 1–2 sentences, explain how the wavelength and frequency of the wave in the string compare to the wavelength and frequency of the wave in the air.
Answers
The wavelength and frequency of the sound in the string is greater than the wavelength and frequency of the sound in the air.
Wavelength and freqeuncy of the soundThe wavelength and frequency of the sound is determined using the following formulas.
v = fλ
f = v/λ
λ = v/f
where;
f is the frequency of the soundλ is the wavelengthWavelength and frequency of the sound in the stringf = 600/λ
λ = 600/f
Wavelength and frequency of the sound in airf = 333/λ
λ = 333/f
Thus, the wavelength and frequency of the sound in the string is greater than the wavelength and frequency of the sound in the air.
Learn more about wavelength and frequency here: https://brainly.com/question/10728818
Consider the following statements.
A. Heat flows from an object with higher
thermal energy to one with lower thermal energy;
B. Heat flows from an object at higher tem-
perature to an object at lower temperature;
C. Heat flows from an object in liquid state
to an object in solid state.
Which statements are true?
Answers
Answer:The heat flows from an object at a higher temperature to the object at a lower temperature. Thus the option A is correct.
Explanation:What is heat flow?
The flow of heat is the transfer of heat that concerns its generation, use and conversion, and exchange.The heat flow follows the laws of the thermodynamics. Heat will flow from the body that is at a higher temperature and will move towards a body of a lower temperature. Thereby maintaining an equilibrium state. As energy is needed to warm or heat up the cold body there is an exchange of energy that takes place.
Infrared radiation is part of a 'family' of waves that also includes visible light and radio waves. What name is given to this 'family'? Give the full name, not the abbreviation.
Answers
Infrared radiation is a part of electromagnetic waves,which also include the visible light and radio waves.
What are electromagnetic waves?The electromagnetic radiation consists of waves made up of electromagnetic field which are capable of propogating through space and carry the radiant electromagnetic energy.
The radiation are composed of electromagnetic waves which are synchronized oscillations of electric and magnetic fields . They are created due to change which is periodic in electric as well as magnetic fields.
In vacuum ,all the electromagnetic waves travel at the same speed that is with the speed of air.The position of an electromagnetic wave in an electromagnetic spectrum is characterized by it's frequency or wavelength.They are emitted by electrically charged particles which undergo acceleration and subsequently interact with other charged particles.
Learn more about electromagnetic waves,here:
https://brainly.com/question/8553652
#SPJ2
How would the removal of the rabbit population affect the other populations in
the ecosystem?
A.
B.
The field mouse population will decrease.
The snake population will increase.
The lizard population will increase.
The tree population will decrease.
C.
D.
Answers
A toy train is going around a circular track of a radius of 1.2 m as shown on the diagram. The train takes 9 seconds to complete one lap of the circular track.
(a) Calculate the speed of the train
(B) on the diagram draw in the train's velocity and acceleration vectors at B. Label clearly.
(c) For the train to move in a circle like this there
must be a centripetal force acting on it.
Explain how this force is being produced
Answers
Explanation:
r=1.2, Period(T) = 9s
a) Speed(V) = ωr
ω = 2 x Pi(3.142) x frequency
frequency = 1/period
therefore; the frequency will be 1/9 = 0.1Hz
Therefore Speed(V) = 2 x 3.142 x 0.1 x 1.2=0.75m/s
C) Centripetal and centrifugal forces are the forces experienced by rotating objects. The centripetal force keeps an object moving in a circle and is always pointed toward the center of that circle. For instance, the gravitational force of the sun is a centripetal force that keeps the Earth orbiting around it. Its direction is always orthogonal to the motion of the body and towards the fixed point of the instantaneous center of curvature of the path.
What is the momentum of an object that has a mass of 0.03 grams and a velocity of 1200 m/s2
Answers
answer is 36
because the formulae of momentum is
mass×velocity
What is the angular speed, in rad/s, of a flywheel turning at 813. 0 rpm?.
Answers
Answer:
The angular speed will be 85.13 rad/sec
Explanation:
Please Answer this question
Answers
Answer:
T = 14.7 N
Explanation:
When released the two blocks will accelerate
See diagram below (hope it is not too confusing or unclear)
describe the ways that people are trying to use technology to protect the environment and increase sustainability.
WILL NAME BRAINLIEST please help
Answers
Answer:
One way people are using technology to protect the environment is:
Using digital devices for communicating and storing information means that there is less reliance on paper, which reduces deforestation. Since trees are an important source of oxygen and also absorb carbon dioxide, this further reduces climate change.
Environmental technology has enabled us to capture this naturally occurring energy and convert it into electricity or useful heat through devices such as solar panels, wind, and water turbines.
Explanation:
Have a great of your day
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