The work done on the car due to friction is -125 J.
What is workdone?Work is said to be done when a force moves an object through a certain distance.
To calculate the workdone on the car by friction, we use the formula below
Formula:
W = m(v²-u²)/2.......... Equation 1
Where:
W = Work done due to fricionm = mass of the carv = Final velocityu = Initial velocityFrom the question,
Given:
m = 10 kgv = 0 m/su = 5 m/sSubstitute these values into equation 1
W = 10(0²-5²)/2W = 5(-25)W = -125 JHence, The work done on the car due to friction is -125 J.
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In science, a new hypothesis must be (mark all correct answers):
1. falsifiable by experimental testing or observations.
2. completely consistent with all previous laws and theories of science.
3. possible to prove correct.
4. based solely on physical causes.
Answer:
1, 2, and 3.
Explanation:
Hypotheses must be able to be proven false, otherwise it’s a law. It must be consistent with other theories otherwise it’s not true, and it has to be possible to prove correct, otherwise it’s a theory.
The true statement is "Falsifiable by experimental testing or observations." The correct option is 1.
In science, a hypothesis is a proposed explanation or prediction for a phenomenon or set of observations.
A new hypothesis is a fresh idea put forth by a scientist to explain a phenomenon or observation that has not been explained or understood fully by existing scientific theories or hypotheses.
The new hypothesis should be based on previous knowledge and observations, and it should be testable and falsifiable through experiments or observations. Scientists use hypotheses to guide their research and develop theories, which are more comprehensive explanations backed up by multiple lines of evidence.
Therefore, only Option (1) is the correct answer.
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If the pressure exerted by the liquid of density 500kg/m3 is 20,000Pa. What is height of liquid column.
The height of the liquid column is 4.08 metres.
The peak of the liquid column is 4.08 metres.
What's strain exerted with the aid of a liquid?As we realize that any liquid exerts a strain at a factor relies upon on the density of the liquid and the vertical intensity. depth is given = h and the acceleration because of gravity is g.
calculation:-
pressure = ρgh
ρ = density of the liquid
g = accaleration due to gravity
h = depth from the surface
l = 500kg/m3
p = 20,000
g = 9.8 ms-2
20,000Pa= 500*9.8*h
h=4.08m
What's the stress density?The stress is the measure of pressure acting on a unit region. Density is the measure of the way intently any given entity is packed, or it is the ratio of the mass of the entity to its extent. The relation between strain and density is direct. exchange in stress will be contemplated in a exchange in density and vice-versa.
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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
Answer:
The total applied force on the trolley is 5 N toward the North.
Explanation:
yes
Use the table to answer the question.
Planet
Estimated Mass of Planet (1024 kg)
Venus
4.87
Mars
0.642
Jupiter
1.898.0
Neptune
102.0
A spacecraft flies within 500.000 km of each of these planets. Which one would gravitationally attract the spacecraft the most?
3
Venus
Mars
Jupiter
Neptune
Answer:
Jupiter is by far the largest.
G = K M / R^2 = K C M since R is given as 5E5 km
G = gravitational attraction
Why is glass a good insulator?(1 point)
Explanation:
Glass is good insulator because of the following reason:
It is poor conductor of heat and electricityIt doesn't allow the flow of current/electron between two atoms, ions or species.It can be easily prepared in industries.It is eco friendly, It does not lead to deforestation like wooden insulator does, and doesn't harm/pollute the environment like rubber and plastic insulator does.It can be used upto high temperature level because it have high melting point (1700°C)Thanks for joining brainly community!
Glass is considered a good insulator because of its special way its molecules are arranged and its properties.
Why is glass a good insulator?Glass is not like other solid materials because it doesn't have a regular structure. This messy pattern of atoms in glass makes lots of tiny holes and dirt in the material. Air bubbles and dirt make it harder for heat to move through the glass, so less heat moves through it.
Glass doesn't transfer heat easily because it has low thermal conductivity. Glass does not allow heat to move through it easily and helps to keep heat inside.
Glass does not easily let electricity pass through it. This means that it doesn't let electricity pass through easily. Glass cannot conduct electricity because it does not have any free electrons or mobile charged particles.
Glass allows infrared radiation, which is a type of heat energy, to pass through it. Glass lets light in but stops some heat from getting through.
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The chemical combination of atom a and atom b would result in
Answer:
A molecule
Explanation:
Two identical (same mass and shape) balls of clay are flying through the air. Ball A is
moving to the right at 4 m/s, while ball B is moving left at 6 m/s. They collide in a
perfectly inelastic collision. What is the velocity of the resulting mass (positive is to
the right)?
Answer in units of meters/second (m/s)
The velocity of the resulting mass after the perfectly inelastic collision of identical balls of clay A and B is 1 m/s to the left.
Conservation of linear momentum
The final velocity of the two identical balls is determined by applying the principle of conservation of linear momentum as shown below;
m₁u₁ + m₂u₂ = v(m₁ + m₂)
where;
u₁ is the initial velocity of ball Au₂ is the initial velocity of ball Bv is the final velocity of both balls after collisionm₁ and m₂ are masses of the two ballsm₁ = m₂ = m
let right direction = positive direction
let left direction = negative direction
m(4) + m(-6) = v(m + m)
4m - 6m = 2mv
-2m = 2mv
v = -2m/2m
v = - 1 m/s
Thus, the velocity of the resulting mass after the perfectly inelastic collision of identical balls of clay A and B is 1 m/s to the left.
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Please Answer this question
Answer:
T = 14.7 N
Explanation:
When released the two blocks will accelerate
See diagram below (hope it is not too confusing or unclear)
Hello people ~
Quantisation of charge implies _____
(a) charge cannot be destroyed
(b) charge exists on particles
(c) there is a minimum permissible charge on a particle
(d) charge, which is a fraction of a coulomb is not possible.
(d) charge, which is a fraction of a coulomb is not possible.
Explanation:
Quantisation implies that the charge, which is a fraction of a coulomb is not possible.
charge which is less than that on electron is not possible.everything has a charge (electrons)Basic minimum charge = 1.6 x 10⁻¹⁹
Answer:
Option D
Explanation:
Let's see
According to quantization of charge property
Q=ne wher n is a integerSo
it means that charge should be integer always like 5e,-7e ,3C etc.
But
frcation of coulomb denotes to rational number i e set Q hence its not possible
if a Bob at rest explodes into two pieces? explain
Answer:
the pieces must travel in opposite directions.
Explanation:
If a bomb at rest explodes into two pieces, the pieces must travel in opposite directions. Explain A bomb at rest explodes into two pieces. Let the mass of bomb be M and mass of two pieces be m1 respectively. Now, according to conservation of momentum: are velocities of two masses after explosion.
If a 20g bullet has a momentum of 8kg calculate its velocity
Explanation:
I hope this helps, you can ask any questions for clarification
Which of these is evidence of global warning?
A) Rising global temperatures
B) An overall decrease in sea levels
C) Stable precipitation patterns
D) An increase in the size of glaciers
Answer:
D
Explanation:
because the glaciers melt adding more water into the sea which make the sea levels rise.
Is the sun making the side walk a chemical or phsical change
Answer: it is chemical .
Explanation: because chemical change that results in the formation of new chemical substances. During the sun tanning, both vitamin D and melanin are produced. your welcome <3 .
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Question: A hemisphere is uniformely charged positively. The electric field a point on a diameter away from the centre is directed
(a) perpendicular to the diameter
(b) parallel to the diameter
(c) at an angle tilted towards the diameter
(d) at an angle tilted away from the diameter
As the electric field is present at a point on diameter the electric field intensity at the electric field components are parallel to the diameter hence they cancel out .
So the field is directed perpendicular towards the diameter
Option A
Think about the process of pulling down the spring and letting it go. For this event, list each form of energy associated with the spring and the weight. (Hint: Use the Energy Graph.)
Answer:
gravitational 2.force of gravityExplanation:
1.it ocours when an object is thrown into the sky. 2.iy ocurs when an object is falling or being pulled from the sky
6. Aste owing questions 1. Answer question i and ii based on the information given below. In biology laboratory, Tashi observed a cell under a microscope. While on the cell, his attention was drawn to a tiny star like close to a large dense spherical body at the centre. He also observer many rod shaped structures scattered inside the cell. (i) Identify the cell organelles observed by Tashi. body a (ii) Is it a plant cell or an animal cell? 3. Study the diagram of a cell in Figure 1.8 and answer the following questions. i. In which group of organisms would you find this cell? Give reasons to support your answer. ii. Name the parts labelled A, B, C, and D. B TO D
The cell is an animal cell and the rod-shaped structures in the cell are mitochondria.
What are cell organelles?Cell organelles are membrane-bound structures found within the cell of eukaryotes which carry out specific functions in the cell.
Some cell organelles include:
mitochondria ribosomes Golgi bodies endoplasmoc reticulumThe rod-shaped structures in the cell are mitochondria.
Asters are star-shaped structures found within the cell which are found close to the nucleus d
at the early mitosis in an animal cell.
Asters do not form during mitosis in plants.
Therefore, the cell is an animal cell and the rod-shaped structures in the cell are mitochondria.
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What is a common characteristic of outer planets?
Answer:
They are all composed of gases.
Explanation:
The inner planets are mainly composed of types of rock. The surface and interior is rocky but the atmosphere is composed of gases. The outer planets happen to be composed mainly of gas, or in other terms, elements. The two primary elements that make up these planets are hydrogen and helium. Because the inner planets are made up of primarily, they have given the nickname the "Terrestial Planets" and the outer planets are called "Gas Giants" because of their gas (elements) composed atmospheres and overall interiors.
Answer: A: they are composed of gas
Explanation:
Which planets are terrestrial? select three options. jupiter mars mercury uranus venus
Mars, mercury, and venus are the planets that are terrestrial planets.
What is the terrestrial planet?A terrestrial planet is one that is predominantly made up of silicate rocks or metals. The inner planets nearest to the Sun, are Mercury, Venus, Earth, and Mars, as terrestrial planets within the solar system.
Mars, mercury, and venus are the planets closest to the sun.
Hence mars, mercury, and venus are the planets that are terrestrial planets.
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Applying definitions Samantha ran 90 meters in 35 seconds to catch up with her dog. When she got to him, she played with him for 70 seconds before they walked back in 75 seconds. Did Saman tha travel at constant speed? What was Samantha's average speed?
No, Saman didn't travel at constant speed
v₁ = 90/35 = 2.57 m/s
v₂ = 0
v₃ = 90/75 = 1.2 m/s
Average speed = total distance/time
Average speed = (90+90)/(35+70+75) = 1 m/s
A man standing between two walls fires a gun and hears two echo. if he stands 200m closer to one of the wallsand the time differenve between the two echos is 0.176seconds,detrmine the distance between the walls(sped of sound in air is 340m/s)
Answer:
850m
Explanation:
The answer should be 850m
I apologize if it is incorrect-
Have a great day!
Anygays-
Two small speakers, 0.695 m apart, are facing in the same direction. They are driven by one 668 Hz oscillator and therefore emit identical sound waves in phase with one another at the respective points of origin. (The speed of sound waves in air is 343 m/s.)
(a) A sound engineer wishes to stand in front of one of the speakers, at the closest point (i.e., smallest x-value) where intensity is at a relative maximum. At what distance x from the nearest speaker should he position himself? (Enter your answer in m.)
(b) The sound engineer now wishes to stand at the closest point along that line where intensity is at a relative minimum. At what distance x should he position himself now? (Enter your answer in m.)
A) The distance x from the nearest speaker when intensity is at maximum ; 0.4272 m
B) The distance x from the nearest speaker when intensity is at minimum ; 0.8123 m
Given data :
Distance between speakers ( d ) = 0.695 m
Frequency of oscillator = 668 Hz
Speed of sound waves in air ( v ) = 343 m/s
A) Determine the distance x from the nearest speaker when he stands where intensity is at maximumGiven that
λ = v / f
= 343 / 668
= 0.5135
Also
Δx = [tex]\sqrt{d^2+x^2} - x[/tex]
Δx = λ for maximum intensity
λ = [tex]\sqrt{d^2+x^2} - x[/tex]
x = ( d² - λ² ) / λ
= ( 0.695² - 0.5135² ) / 0.5135
= 0.4272 m
B) Determine the distance x from the nearest speaker when he stands where intensity is at minimumGiven that
λ = v / f
= 343 / 668
= 0.5135
Also
Δx = S₁P - S₂P
Δx = [tex]\sqrt{d^2+x^2} - x[/tex]
since the intensity is minimum
Δx = λ/2
Therefore
λ/2 = [tex]\sqrt{d^2+x^2} - x[/tex]
x = ( d² - λ²/4 ) / λ
= ( 0.695² - 0.5135² / 4 ) / 0.5135
= ( 0.695² - 0.0659 ) / 0.5135
= 0.4171 / 0.5135 = 0.8123 m
Hence we can conclude that The distance x from the nearest speaker when intensity is at maximum ; 0.4272 m and The distance x from the nearest speaker when intensity is at minimum ; 0.8123 m.
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Name all the energy transfers that occur to make a solar-powered traffic light work (name what generates the energy, and what kind of energy it turns to):
If a bar magnet's nuetral region is broken in two, what will most likely occur?
Answer:
If a bar magnets neutral region is broken into two, the newly cut faces will become the new north or south poles of the smaller pieces.
Answer:
Explanation:
You will create two separate bar magnets. Let's say we have a bar magnet with a north pole at the top region, and a south pole in the bottom region. The magnetic field lines will run from the north pole to the south pole. If the bar magnet were broken into the two, the portion containing the north pole will now have a south pole at the point where it was broken. Similarly, the section containing the south pole will have a north pole at the point where it was broken.
The reason for this is because magnetic monopoles do not exist. There are electric monopoles, those are called electrons. But there are no magnetic monopoles. There is no such thing as a magnetic charge. Mathematically, this is captured in Maxwell's equations. The divergence of the magnetic field is always zero, which means there is no such thing as a magnetic monopole. There is nothing theoretically stopping a magnetic monopole from existing. A lot of theories actually favor it. We just have no proof of it, so we assume they dont exist.
You are sitting at a coffee shop and you overhear a conversation at the next table. Two mothers are discussing their teen children and complaining about their behavior- erratic and irrational behavior, displaying little to no logic and reason. One says to the other, I just don’t know who he is. You have just listened to the NPR article and learned about the Endocrine System. You offer the following advice……
Answer:
Explanation:
Our five-year-old, Gabriel, is a very bright, funny, charming little guy. But he still has a lot of tantrums, which we thought would be over by this age. He reacts very poorly to consequences. He will get very threatening and aggressive physically and verbally: slamming doors, hitting, and lashing out verbally. We are constantly negotiating with limit setting. When we hold to the limit, he will escalate and sometimes will have very intense tantrums that can last over 30 minutes. When he is happy, he is the most delightful child. But the second something doesn’t happen exactly how or when he wants it, he is explosive. We are totally exhausted
How long is a wave that has a frequency of 2.70X102 Hz and is moving through copper at 3560 m/s?
The wavelength of a wave that has a frequency of 2.70X102 Hz and is moving through copper at 3560 m/s is 13.19m.
How to calculate wavelength?The wavelength of a wave can be calculated using the following formula:
λ = v/f
Where;
λ = wavelength (m)v = speed (m/s)f = frequency (Hz)According to this question, a wave has a frequency of 2.70X10² Hz and is moving through copper at 3560 m/s. The wavelength is calculated as follows:
λ = 3560/270
λ = 13.19m
Therefore, the wavelength of a wave that has a frequency of 2.70X102 Hz and is moving through copper at 3560 m/s is 13.19m.
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A loudspeaker diaphragm is oscillating in simple harmonic motion with a frequency of 379 Hz and a maximum displacement of 0.562 mm. What are the (a) angular frequency, (b) maximum speed, and (c) magnitude of the maximum acceleration
Answer:
f = 379 / s given
A) ω = 2 pi f = 2380 / sec
B) Vmax = ω A = 2380 / sec * .000562 m = 1.34 m.s
C) amax = -ω^2 A = -(2380)^2 * .000562 = -3180 m/s^2
A girl is travelling on her bike at a speed 2.54 m/s. If the girl and her bike have a kinetic energy of 193 J, what is the combined mass of the girl and her bike? Show all your work.
Answer:
About 59.83 kg
Explanation:
The formula for kinetic energy is [tex]KE = \frac{1}{2}mV^2[/tex], where KE = Kinetic Energy in Joules (J), m = mass in kilograms (kg), and V = Velocity in meters per second (m/s).
In this problem, we are given the Kinetic Energy amount as 193 Joules and the Velocity as 2.54 m/s. Let's plug it into our equation
[tex]193 = \frac{1}{2} * 2.54^2m[/tex]Now, let's solve this equation.
Step 1: Simplify both sides of the equation.
[tex]193 = 0.5 * 2.54 * 2.54 * m[/tex] [tex]193=3.2258m[/tex]Step 2: Divide both sides by 3.2258.
[tex]193/3.2258 = 3.2258m/3.2258[/tex] m ≈ 59.830 kilogramsin a railyard a train is being put together from freight cars.An empty freight car coasting 10 m/s strikes a loaded car that is stationary and the cars couple together. Each of the cars Haas a mass of 3000kg when empty and the loaded car contains 12000kg of canned soda . with what speed does the combination of the two cars start to move?
Answer:m1v1 + m2v2 = (m1f + m2f)vf. 3000kg(10.0m/s) + (15000kg)(0.0m/s) = (18000kg)(vf).
Explanation:
How much energy is given to each coulomb of charge that flows through a 1. 5-v battery?.
Answer:
1.5 jouls for 1 coulomb
Explanation:
energy(U)=charge(q)*potential(V)
so U for 1 coulomb U=1*1.5=1.5 jouls
and for 1 electron U=(1.6*10^(-19))*1.5= 2.4*10^(-19) jouls
Questions #4, 5, and 6:
Part 1 of 3: Two moles of helium gas initially at 335 K and 0.58 atm are compressed isothermally to 1.44 atm. Find the final volume of the gas. Assume that helium behaves as an ideal gas. The universal gas constant is 8.31451 J/K · mol. Answer in units of m³.
Part 2 of 3: Find the work done by the gas. Answer in units of kJ.
Part 3 of 3: Find the thermal energy transferred. Answer in units of kJ.
For two moles of helium gas initially at 335 K and 0.58 atm are compressed isothermally to 1.44 atm, The solutions are is mathematically given as
V2=0.03818 m3W=-5.065KJQ =5.065 KJWhat is the final volume of the gas?Generally, the equation for the Ideal gas law is mathematically given as
PV=nRT
Therefore
V1=2*8.31451*335/(0.58*1.01325*105)
V1=0.09479 m3
Also
V2=V1*(P1/P2)
V2 =0.09479*(0.58/1.44)
V2=0.03818 m3
b)
W=nRTLn(V2/V1)
W=2*8.31451*335*Ln(0.03818/0.09479)
W=-5.065KJ
c)
In conclusion, Heat energy
Q=-W
Q =5.065 KJ
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