Using ohms law
[tex]\\ \sf\longmapsto \dfrac{V}{I}=R[/tex]
[tex]\\ \sf\longmapsto I=\dfrac{V}{R}[/tex]
[tex]\\ \sf\longmapsto I=\dfrac{12}{80}[/tex]
[tex]\\ \sf\longmapsto I=0.15A[/tex]
Read the ruler in millimeters to the correct degree of precision
3.50
3.55
35
35.1
Answer:
The answer is = 35.1 you can see by zooming.
Answer:
The answer would be 35.1
What type of evidence is needed for a hypothesis to be supported or not supported?
O demonstrative evidence
O observational evidence
O physical evidence
O circumstantial evidence
Answer:
Answer in Observational evidence (b)
The evidence needed to formulate a hypothesis is observational evidence. From keen observations, we are formulating a scientific hypothesis.
What is hypothesis ?Hypothesis is a plausible scientific statement which predicts a process or result of an experiment based on observations. Hypothesis can be made from well established scientific records also.
Some are formulating hypothesis based on some intuitions, while some others are formulated based on inductions or deductions. An experiment starts from a clear cut hypothesis.
A hypothesis must be testable, falsifiable. A scientific hypothesis must be based on a strict observation and for a considerable time and the observations must support for the statement derived for the solution.
Hence, the evidence is needed for a or a hypothesis to be supported or not supported is observational evidence.
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density of certain liquid is2.4 g/cc. calculate the mass of 100cc of such liquid
Answer:
Explanation:
Density = mass / volume
density = 2.4
volume = 100 cm^3
2.4 = m / 100 Multiply both sides by 100
2.4 * 100 = m
m = 240 grams
A car has steady speed of 8 m/s .How far
does the car travel in 8s
Answer:
Explanation:
Distance traveled = steady speed * time duration = 8m/sec * 8 sec = 64 meters
Answer:
64 m
Explanation:
Multiply 8 m by 8.
A car with a mass of 1200kg is travelling at 72kmh^-1 when the driver sees a dog running across the street. He applies the brakes and 10 seconds later the car is moving at 18kkmh^-1.
A) Calculate the initial momentum of the car.
B) Calculate the final momentum of the car.
C) Calculate the change in momentum of the car.
D) Calculate the net force applied by the brakes of the car.
Please find attached photograph for your answer. Please do comment whether it is helpful or not.
Does the government think about the welfare of its citizens? Justify (Mention any 2 points)
Answer:
Yes government thinks about the welfare of its citizens because:-
1 they are developing new things day by day.
2 they distribute clothes and different things to their citizens
A space station worker found herself floating free 100 meters from the space station because her safety line became unhooked
Answer:
Explanation: is that suppose to be the question or are you just saying?
According to the graph the acceleration of the object is ?
A) Constant
B) decreasing
C) increasing
D) zero
Answer:
your answer is (B) decreasing
I hope it's helps you
Can someone tell me which is which on what i put i dont know what i should put
A bullet fired from a pistol travelled 50 metres to the target in 0.08s. What was its speed?
Its speed is 4m/s
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Convergent plate boundaries are when plates
collide
move past each other
move apart
Explanation:
Collide is your answer
have a good day.
a hot metal block is placed into 50g of water in an insulated container the water increases in temperature from 20c to 32c the specific heat capacity of water is 4200j/kgk calculate the quantity of heat energy supplied to the water from the metal
Answer:
25,000 joules
given the formula
Q=Mc(final temperature - initial temperature)
M=50 grams convert to kilogram 0.5
c= 4200 j/kg/k
final temperature=32c
initial temperature=20c
Why is running or jogging good aerobic excercise? Explain
Answer:
Running is faster, uses more kilojoules and demands more effort from the heart, lungs and muscles than jogging. Running requires a higher level of overall fitness than jogging. Both running and jogging are forms of aerobic exercise.
Explanation:
Record the length of the line shown in centimeters.
7.30
7.12
7.3
7.28
Please help will be marked most brainlist !!
Zooming I. On the image the red line is just short of the 3rd line past the 7 so it is not 7.3 but just a little under.
Answer: 7.28
5 reasons why people should use electricity wisely
Answer:
1. heating
2. entertainment
3. cooling
4.educational purpose
5.comfort
help with the number 2 question
Answer:
It is frequently stated that the value of the acceleration due to gravity at the pole is larger than at the equator because the poles are closer to the center of the earth due to the earth's oblateness. ... The measured value is larger because the earth's density is not uniform but increases toward the center.
Answer:
as explained that poles have more gravitational
force (9.83m/s^2) as the poles of earth is nearer to the center because it is flat at poles
but certainly at equator is having less gravitational force (9.78m/s^2) as it is Farr from centre of earth because it is bulgded at equator.
hence, poles have more gravitational force as co.pared to that of equator.
hope this helped you
any confusion the comment it.
a heat engine gives out 400J of heat energy as the useful work.calculate the energy given to it as input if its efficiency is 40%?
Answer:
E(efficiency) = E(out) / E(in)
.4 = 400 J / E (in)
E (in) = 1000 J
Heat input : 1000J
What is efficiency of a heat engine ?
The efficiency of a heat engine is defined as the ratio of work done by the heat engine absorbed per cycle.
Given : work output = 400 J
Efficiency = 40 % = 0.4
heat input = ?
Efficiency = work output / heat input
0.4 = 400/heat input
heat input : 1000J
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Any two waves that meet as they travel through the same medium will interact. If the two waves are in phase their crests will coincide and they will experience _____ interference, producing a wave with a(n) _____ amplitude.
Answer:
constructive
alpitude
the density of the metal is 8.9g/cm³.what does it mean. What is the importance of the value
Density of the metal is 8.9g/cm^3
It means per 1cm^3 Volume there is 8.9g of Mass occupied .Density:-
[tex]\boxed{\sf Density=\dfrac{Mass}{Volume}}[/tex]
SI unit:-
SI unit of density is kg/m^3
CGS unitCGS unit of density is g/cm^3
what is the density of a 75 g block of wood measuring 12 cm x 8cm x 9cm
Answer:
density is equal to mass divided by volume (m/v)
volume: 12×8×9=864cm³
75÷864=0.09
Answer: 0.09g/cm³
5. A ball with momentum of 16 kg x m/s strikes a ball at rest. What is the total momentum of both balls after the collision? a. -16kg x m/s b. -8 kg x m/s c. 8 kg x m/s d. 16 kg x m/s? help please
Answer:
D. 16 Kgm/s
Explanation:
Let the momentum of the two balls be A and B respectively.
Momentum A = 16 kgm/s
Momentum B = 0 kgm/s (since the ball is at rest).
Total momentum = A + B
Total momentum = 16 + 0
Total momentum = 16 Kgm/s
Momentum can be defined as the multiplication (product) of the mass possessed by an object and its velocity. Momentum is considered to be a vector quantity because it has both magnitude and direction.
Mathematically, momentum is given by the formula;
Momentum = mass * velocity
what is pulley? How does it help in lifting weight?
Hey there!
A pulley is a "system" that has a rope attached to carry heavy materials off the ground. Once you pull the rope, the heavy item will be carried.
Hope this helps!
Have a great day!
A car moves with an average speed of 45 mph. How long does a car take to travel 90 miles?
Answer:
It took 2 hours
Explanation:
[tex]{ \bf{time = \frac{distance}{speed} }} \\ [/tex]
distance is 90 miles
speed is 45 miles per hour
[tex]t = \frac{90}{45} \\ \\ t = 2 \: h[/tex]
Answer:
2 hours
Explanation:
45 times 2 is 90
Why is carbon said to provide a “backbone” in many molecules?(1 point)
Carbon atoms can form chains and branches with each other, and other atoms can attach to these.
Carbon atoms have long narrow shapes, allowing many other atoms to attach to them.
Carbon atoms have full shells of electrons, allowing electrical signals to pass through them easily.
Carbon atoms have half-full shells of electrons, allowing electrical signals to pass through them easily.
Answer:
The carbon atom has unique properties that allow it to form covalent bonds to as many as four different atoms, making this versatile element ideal to serve as the basic structural component, or “backbone,” of the macromolecules.
Carbon is said to provide a “backbone” in many molecules because Carbon atoms can form chains and branches with each other, and other atoms can attach to these, therefor the correct answer is option A
What is a Chemical compound?The chemical compound is a combination of two or more either similar or dissimilar chemical elements, for example, H₂O is a chemical compound made up of two oxygen atoms and a single hydrogen atom.
As given in the problem carbon is said to provide a “backbone” in many molecules because Carbon atoms can form chains and branches with each other, and other atoms can attach to these.
The fact that carbon atoms may share electrons with one another to build lengthy chains with other carbon atoms accounts for the enormous variety of organic molecules. Catenation is a characteristic of carbon that makes it special. By transferring their valence electrons to neighboring carbon atoms, carbon atoms can create lengthy chains.
Thus, therefore the correct answer is option A
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Is ambition a good or bad thing?
Answer:
some amount of ambition is good for your motivation but excess ambition is dangerous.
In your own words, provide two examples of scientific data that scientists use to explain how the Big Bang could
have been the birth of the Universe.
Explanation:
One example of how the big bang could have been the birth of the universe is the expansion of it... (Expand on it) (It says in your own words)
estimate my age in seconds 14 years old
1. A car starts from rest and accelerates uniformly for 8.0 s. It reaches a final speed of 15
ms1
a. What is the acceleration of the car?
b. What is the average velocity of the car?
C. Calculate the distance travelled by the car.
Answer:
a. [tex]a=1.875\,ms^{-2}[/tex]
b. [tex]v_{0} =7.5\,ms^{-1}[/tex]
c. [tex]s=60\,m[/tex]
Explanation:
Given,
[tex]u=0\,ms^{-1}\,;[starts\,from\,rest]\\v=15\,ms^{-1}\\t=8\,s[/tex]
a. We know,
∴[tex]v=u+at\\=>15=0+a*8\\a=1.875\,ms^{-2}[/tex]
b. We know,
∴[tex]s=\frac{u+v}{2}*t\\=>s=\frac{0+15}{2}*8\\s=60\,m[/tex]
average velocity,[tex]v_{0} =\frac{s}{t}=\frac{60}{8}=7.5\,ms^{-1}[/tex]
c. From b, the answer is 60 m
hope you have understood this....
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difference between:
1.distance and displacement
2.centripetal froce and centrifugal force
3.speed and velocity
4.velocity and acceleration
Explanation:
Distance is a scalar quantity that refers to "how much ground an object has covered" during its motion. Displacement is a vector quantity that refers to "how far out of place an object is"; it is the object's overall change in position.Centripetal force is the force REQUIRED for circular motion. Centrifugal force is the force that makes something flee from the center.Speed is the time rate at which an object is moving along a path, while velocity is the rate and direction of an object's movement.Velocity is the rate of change of displacement. Acceleration is the rate of change of velocity.The acceleration of a particle is given by a = c1 + c2v, where a is in millimeters per second squared, the velocity v is in millimeters per second, and c1 and c2 are constants. If the particle position and velocity at t = 0 are s0 and v0, respectively, determine expressions for the position s of the particle in terms of the velocity v and time t.
The expression for the position of the particle in terms of velocity and time is given as, s = vt
The given expression:
[tex]a = c_1 + c_2v[/tex]the unit of a = mm/s²the velocity, v = mm/sc₁ and c₂ are constantthe position of the particle at time, t = 0, is s₀ and v₀To find:
The expression for the position s of the particle in terms of the velocity v and time tDetermine the value of the constants from second equation of motion given as:
[tex]s = vt + \frac{1}{2}at^2\\\\substitute \ the \ given \ value \ of \ a\\\\s = vt + \frac{1}{2}(c_1 + c_2v)t^2\\\\s = vt + \frac{1}{2} c_1 t^2 + \frac{1}{2} c_2vt^2\\\\divide \ through\ by \ t^2\\\\\frac{s}{t^2} = \frac{v}{t} + \frac{1}{2} c_1 + \frac{1}{2} c_2v\\\\multiply \ through \ by \ 2\\\\\frac{2s}{t^2} = \frac{2v}{t} + c_1 + c_2v\\\\when \ t = 0\\\\0 = 0 +c_1 + c_2v\\\\c_1 + c_2v = 0\\\\from \ the \ original \ equation;\\\\s = vt + \frac{1}{2} (c_1 + c_2v)t^2\\\\[/tex]
[tex]s = vt + \frac{1}{2}(0)^2\\\\s = vt[/tex]
Thus, the expression for the position of the particle in terms of velocity and time is given as, s = vt
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