The current is increased by a factor of 8.
From 18/35 A. to 144/35 A.
The electric current changes from 0.514 ampere to 4.14 ampere, i.e, electric current flow in the circuit increases 8 times.
What is electric current?A stream of charged particles, such as electrons or ions, travelling through an electrical conductor or a vacuum is known as an electric current. The net rate of electric charge flowing through a surface or into a control volume is how it is calculated.
Initial electric current flowing through the circuit = (18 volt ÷ 35 ohms)
= 0.514 ampere.
When the initial voltage of 18 V is doubled, and the initial resistance of 35 Ohms is reduced by a factor of 4, electric current flowing through the circuit will be = (2 × 18 volt )÷ (35 ohms÷4)
= 4.114 ampere.
Hence, electric current changes from 0.514 ampere to 4.14 ampere, i.e., electric current flow in the circuit increases 8 times.
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physical sciences Practical test
so ummmm what about ?
because I cant see any actual question?
What are some ways that humans depend on the ocean?
Answer:
A lot of the earth oxygen comes from the ocean around 50%-80%
Explanation:
Answer:
fishingswimming/entertainmentthe algae that gives us oxygenwater! It evaporates and gives us rainresearchExplanation:
What is the relationship between the density of a substance and the speed of sound through that substance?
Answer:The greater the density of a medium, the slower the speed of sound. This observation is analogous to the fact that the frequency of a simple harmonic motion is inversely proportional to m, the mass of the oscillating object. The speed of sound in air is low, because air is easily compressible.
Explanation:
3/8 of light initial intensity is absorbed in the breaker with length of 2cm filled with 9% solution. Find the length of the beaker should be used to get transmittance 1/3 for the same solution
Answer:
Assume I1 = Io * T1 transmission proportional to thickness
I2 = Io * T2 I is intensity of light absorbed (3/8 absorbed)
I1 / I2 = T1 / T2
T2 = T1 * (I2 / I1) = 2 * (2/3 / 3/8) = 2 * 16/9 = 32/9 thickness for 2/3 absorbed
The length of the beaker when the transmittance is changed to one-third is 13.78 cm.
The given parameters;
length of the beaker when 3/8 of the light intensity is absorbed = 2 cm = 0.02 mTo find:
the length of the beaker when there is 1/3 transmittanceThe length of the beaker is calculated by applying Beer-Lambert law;
[tex]\frac{I}{I_o} = e^{-cl}[/tex]
[tex]\frac{I_1}{I_0} = e^{-cl_1} = \frac{3}{8} \ ----(1)\\\\\frac{I_2}{I_0} = e^{-cl_2}= \frac{1}{3} \ ---- (2)[/tex]
divide equation (1) by equation (2);
[tex]\frac{e^{-cl_1}}{e^{-cl_2}} = \frac{3}{8} \times \frac{3}{1} \\\\ (c \ is \ constant \ for \ both) \\\\e^{-l_1 + l_2} = \frac{9}{8} \\\\l_2 - l_1 = ln(\frac{9}{8} )\\\\l_2 - 0.02 = 0.1178\\\\l_2 = 0.1178 + 0.02\\\\l_2 = 0.1378 \ m\\\\l_2 = 13.78 \ cm[/tex]
Thus, the length of the beaker when the transmittance is changed to one-third is 13.78 cm.
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A DC generator is the same as a(n)
A. electric motor.
B. AC generator.
C. armature.
D. electric current.
Answer:
A DC generator is the same as a(n)
C. armature
Which of the following is an example of potential energy?
A. The plant sitting on the desk
B. The airplane Flying in the air
C. The car driving on the Street
D. The person standing up
Answer:
A
Explanation:
potential energy is energy due to position
HELP ME PLSSS What are the possible genotypes
of the F, offspring? What are the
possible phenotypes of the F,
offspring?
Answer:
the answer is b i think
Answer:Within an individual organism, the specific combination of alleles for a gene is known as the genotype of the organism, and (as mentioned above) the physical trait associated with that genotype is called the phenotype of the organism.
Explanation:
The phenotype is the trait those genes express. ... Looking at the possible offspring, each box (or possible offspring) has two copies of the dominant gene. This means there is a 100% chance of the offspring having brown eyes, or being BB. It's important to note here that each box represents a possible offspring.
Could Mars be a suitable alternative to Earth as a second home for humans? Explain your answer.
Answer:
yes
Explanation:
After the Earth, Mars is the most habitable planet in our solar system due to several reasons: Its soil contains water to extract. It isn't too cold or too hot. ... Gravity on Mars is 38% that of our Earth's, which is believed by many to be sufficient for the human body to adapt to.
Please help will mark brainliest
Why is the melting of ice a physical change?
A.
It changes the chemical composition of water.
B.
It does not change the chemical composition of water.
C.
It creates new chemical bonds.
D.
It forms new products.
E.
It is an irreversible change that forms new products.
Answer:
b
Explanation:
it melts yes but it's still water [same element] so there fore it's a physical change
Answer:
It does not change the chemical composition of water. Explanation: A physical reaction is defined as the reaction in which a change in shape, size takes place. No new substance gets formed in these reactions.
Explanation:
Hope this helped
Write a one paragraph essay about the importance of the different biomolecules in our life.
Answer:
#tried my bestt
do mark me as brainlist
Biomolecules are made by living organisms and they are made because they are functional. Biomolecules, or at least most of them, do not exist outside of living organisms because they are too complex to be created by chance chemical collisions. The odds of a single average sized protein to form by chance has been calculated at 1 out 10 to the 77th power. Biomolecules REQUIRE intelligent agency to form them.
The four main purposes of biomolecules are:
1. Structure (some proteins)
2. Energy storage and release (carbohydrates)
3. Protective layers (lipids)
4. Information storage and communication (DNA, RNA, endocrines of numerous various types and manipulated molecules, such as fatty acids)
a hole in a copper plate has a diameter of 1.325 cm at 21C°. At what tempreture is the diameter equal to 1.164 cm
Answer:14C
Explanation:
Label the parts of the wave.
Answer:
A: Wavelength
B: Crest
C: Trough
D: Amplitude
Answer:
A:
✔ crest
B:
✔ amplitude
C:
✔ trough
D:
✔ wavelength
Explanation:
Can someone please help me with this
Answer:
B because the earth rotational axis tilt away from the sun.
Radiation present in the environment but not produced by humans is called ______.
Answer:
background
Explanation:
any help would be appreciated! :)
Answer:
primary voltage/secondary voltage = number of turns on primary coil/number of turns on secondary coil
V1/V2= N1/N2
1.5/5 = 150/N2
0.3 = 150/N2
N2= 150/0.3
N2 = 500
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pls help
Can humans start to direct their own evolution and take over natural selection? Are we influencing our own evolution?
Answer:
yes they can
Explanation:
sure if they want
Photos A and B both show the same field of view containing a star-forming molecular cloud. One of the photos was taken in visible light and the other in infrared light. Which one is the visible-light photo, and how do you know?
Hello. You did not present the photos to which the question refers, which makes it impossible for your question to be answered. However, I will try to help you in the best possible way.
Your question informs us that the photos are of a star-forming molecular cloud. The molecular cloud has dust, especially when the star is forming. In this case, we must keep in mind that in photos taken in visible light, the dust is able to appear, especially in space, where this dust would not reflect light, unlike the star in formation. In this case, we can conclude that in the case of the photo taken in visible light, we could see the molecular cloud as a dark spot, due to the dust. However, it would not be possible to view it in a photo taken with infrared light.
what type of wave travels through matter only??
A mechanical wave can only travel through matter.
What are the most essential skills in Team Handball and why?
Answer:
The most important skill in handball is passing or throwing
Explanation:
You need to be able to pass the ball with accuracy. Throwing and shooting drills are normally incorporated into every training session for handball.
Answer:
Explanation:
The most important skill in handball is passing or throwing. You need to be able to pass the ball with accuracy. Throwing and shooting drills are normally incorporated into every training session for handball.
the molecules in a solid state have _______ energy then molecules in a gas state
Answer:
less
Explanation:
hope this helps....................:)
verify the law of moment.
Explanation:
TO VERIFY THE PRINCIPLE OF MOMENTS WHICH STATES THAT IF A NUMBER OF COPLANAR FORCES ACTIING ON A BODY S ,KEEP IT IN EQUILIBRIUM AND THEIR MOMENT ARE TAKEN ABOUT ANY POINT IN THEIR PLANE,THE SUM OF THE CLOCKWISE MOMENTS ,IS EQUAL TO SUM OF ANTICLOCKWISE MOMENT.
please mark me brainlist :)Answer:
TO VERIFY THE PRINCIPLE OF MOMENTS WHICH STATES THAT IF A NUMBER OF COPLANAR FORCES ACTING ON A BODY, KEEP IT IN EQUILIBRIUM AND THEIR MOMENT ARE TAKEN ABOUT ANY POINT IN THEIR PLANE, THE SUM OF THE CLOCKWISE MOMENTS, IS EQUAL TO SUM OF ANTICLOCKWISE MOMENT.
HELP!!! 50 POINTS
4. Predicting What would have happened, in terms of thermal energy transfer, if the water temperature had originally been10.0°C? Explain your reasoning.
Context:Background InformationThe quantity of energy transferred by heat from a body depends on anumber of physical properties of the body and its surroundings. For a given substance, the rate at which thermal energy is transferred by conduction depends on temperature difference, cross-sectional area,and a thermal conductivity constant that is unique to the substance.By choosing one of these properties as a manipulated variable and making the other properties controlled variables, the effect of the manipulated variable on thermal conduction can be determined experimentally.In this investigation, you will study the rates of cooling of three containers of water of equal volume but different surface area.
Answer:
do u have a picture of the question?
Explanation:
it would be easier to solve
1. An elevator is moving up at a constant velocity of 2.5 m/s, as illustrated in the
diagram below: The passenger has a mass of 85 kg,
a. Construct a force diagram for the passenger
Calculate the distance of the end of a valley bearing in mind that the echo takes 0.7 seconds to be heard from the moment when the sound was produced.a
Answer:238m
Explanation:Distance = speed x time
Speed = 340 m/s
340 m/s x .07 s = 238m
pls answer this right I will give you a brainiest.
Answer:
i would pick c
Explanation:
because, w and y it is very bright and bright can be very conductive like it said.
In the nucleus ______________
tell cells what to do and how to change.
Answer:
i believe it is dna
Explanation:
if i remember correctly if the dna tells the cell what to do and how to do it
Consider two walls, A and B, with the same surface areas and the same temperature drops across their thicknesses. The ratio of their thermal conductivities is kA/kB=4 and the ratio of the wall thickness is LA/LB=2. The ratio of heat transfer rates through the walls qA/qB is:
(a) 0.5
(b) 1
(c) 2
(d) 4
(e) 8
(f) None of them
Answer:
(c) 2
Explanation:
Heat transfer across the walls due to conduction is given by:
[tex]q = -KA\frac{\Delta T}{L}[/tex]
where,
q = heat transfer rate
K = thermal conductivity
A = Area
ΔT = change in temperature
L = thickness
For wall A:
[tex]q_A = -K_AA\frac{\Delta T}{L_A}[/tex]
For wall B:
[tex]q_B = -K_BA\frac{\Delta T}{L_B}[/tex]
Because the change of temperature and area of walls are the same. Dividing both terms:
[tex]\frac{q_A}{q_B} = \frac{\frac{K_A}{L_A} }{\frac{K_B}{L_B}}\\\\ \frac{q_A}{q_B} =\frac{\frac{K_A}{K_B} }{\frac{L_A}{L_B}}[/tex]
using values given in the question:
[tex]\frac{q_A}{q_B} = \frac{4}{2}\\\\\frac{q_A}{q_B} = 2[/tex]
Therefore, the correct answer is:
(c) 2
A 31 kg child is traveling at 4 m/s while sledding down a hill. What is the child's kinetic energy at the bottom of the hill?
Answer:
K.E = 248 J
Explanation:
Since the child is travelling at a given velocity. The kinetic energy of the child down the hill can be given by the following formula:
[tex]K.E = \frac{1}{2}mv^2\\[/tex]
where,
m = mass of the child = 31 kg
v = velocity of the child = 4 m/s
Therefore,
[tex]K.E = \frac{1}{2}(31\ kg)(4\ m/s)^2\\[/tex]
K.E = 248 J
Why is your weight the same any place on Earth?
Answer: A person can weigh differently at various place on Earth because of the fluctuations in Earth's gravity, according to a new high-resolution map. ... Earth's gravity is weaker at the equator due to centrifugal forces produced by the planet's rotation
Explanation:
A rocket experiences a 45,000 N force as it accelerates at 30 m/s/s. What is the mass of the rocket?
Answer:
15,00kg
Explanation:
here's your solution
=> force = 45,000N
=> acceleration = 30m/s^2
=> mass = ?
=> Mass = force/acceleration
=> mass = 45,000/30
=> mass = 15,00kg
hope it helps