Please I need help with this question (see image).
Show workings where necessary.
Answer:
I think the reason why ice is forming on the aluminium lumps and not the beaker, is because:
The beaker is already on the same temperature as the mixture inside it: as a result, there is no heat transfer.
on the other hand, the Aluminium Lumps is at a way lower temperature than the mixture and as a result, there is heat transfer from the water around the lumps to the aluminium Lumps itself.
turning the water into ice.
Heat is lost from the water, and gained on the aluminium.
Since the water was turned to ice.
we can say that the final temperature of the heat transfer process is 0°C.
Notice that we'll be making use of the latent heat of fusion for ice. since water is being converted to ice at 0°C.( workout is in above attachment)
I need help with this
Answer:
position 1 and 4................
Why is training important?
What is a 60 kg car's velocity if it has a momentum of 2400 kg m/s?
Answer:
40m/s
Explanation:
momentum = mass * velocity
momentum / mass = velocity
2400kg*m/s / 60kg = 40m/s
A mixture of 5 cm3 of CH4 and 100 cm3 of air is exploded. Assume air is 80% N2 by volume and 20% O2 by volume. The resulting mixture is cooled. All volumes are measured at room temperature and pressure.
CH4(g) + 2O2(g) → CO2(g) + 2H2O(l)
What is the composition of the resulting gas?
Answer:
The composition of the resulting gas;
A. 5 cm³ of CO₂, 10 cm³ of O₂, 80 cm³ of N₂, and 10 cm³
Explanation:
The given parameters are;
The volume of CH₄ in the mixture of air and methane = 5 cm³
The volume of air in the mixture of air and methane = 100 cm³
The percentage by volume of nitrogen, N₂ in the air = 80%
The percentage by volume of oxygen, O₂ in the air = 20%
The equation for the reaction of the chemical reaction between the methane and the air in the mixture is given as follows;
CH₄(g) + 2O₂(g) → CO₂(g) + 2H₂O(l)
Therefore, we have;
1 mole of CH₄ reacts with 2 moles of O₂ to produce 1 mole of CO₂ and 2 moles of H₂O
By Avogadro's law, we have that equal volumes of all gases at the same temperature and pressure contains equal number of molecules
Therefore, we have;
1 cm₃ of CH₄ reacts with 2 cm³ of O₂ to produce 1 cm³ of CO₂ and 2 cm³ of H₂O
From which we have;
5 cm₃ of CH₄ reacts with 10 cm³ of O₂ to produce 5 cm³ of CO₂ and 10 cm³ of H₂O (steam)
The volume of the oxygen used in the reaction = 10 cm³
The volume of oxygen present in the air = 20% × 100 cm³ = 20 cm³
The volume of nitrogen present in the air = 80% × 100 cm³ = 80 cm³
Therefore, the composition of the resulting gas is given as follows;
1) 80 cm³ Nitrogen
2) 10 cm³ Oxygen
3) 5 cm³ CO₂
4) 10 cm³ H₂O
The final composition of all the gases in the mixture has been [tex]\rm 80\;cm^3[/tex] Nitrogen, [tex]\rm 10\;cm^3[/tex] oxygen, [tex]\rm 5\;cm^3[/tex] carbon dioxide, and [tex]\rm 10\;cm^3[/tex] water (steam). Thus, the correct option is A.
The mixture of air has been composed of 20 % oxygen and 80 % nitrogen. The volume of air has been [tex]\rm 100\;cm^3[/tex]. Thus, the volume of oxygen and nitrogen in the air has been:
The volume of oxygen, [tex]V_O_2=20\;\rm cm^3[/tex]
The volume of nitrogen, [tex]V_N_2=80\;\rm cm^3[/tex]
Since the reaction, the nitrogen has been remained unused, thus the final composition of nitrogen has been [tex]\rm 80 \;cm^3[/tex].
The balanced equation for the reaction of methane with oxygen has been:
[tex]\rm CH_4\;+\;2\;O_2\;\rightarrow\;CO_2\;+\;2\;H_2O[/tex]
According to Avogadro's law, the presence of gases at the same temperature has volume proportional to the moles of the gases.
Thus, from the balanced chemical equation:
[tex]\rm 1\;cm^3\;CH_4=2\;cm^3\;O_2[/tex]
Thus,
[tex]\rm 5\;cm^3\;CH_4=10\;cm^3\;O_2[/tex]
Since the available oxygen has been [tex]\rm 20\;cm^3[/tex], the remaining oxygen after the reaction has been [tex]\rm 10\;cm^3[/tex].
Thus, the final composition of oxygen has been [tex]\rm 10\;cm^3[/tex].
Methane has been the limiting reactant. Thus, the concentration of carbon dioxide and water formed has been:
[tex]\rm 1\;cm^3\;CH_4=1\;cm^3\;CO_2\\5\;cm^3\;CH_4=5\;cm^3\;CO_2[/tex]
The final composition of carbon dioxide has been [tex]\rm 5\;cm^3[/tex].
[tex]\rm 1\;cm^3\;CH_4=2\;cm^3\;H_2O\\5\;cm^3\;CH_4=10\;cm^3\;H_2O[/tex]
The final composition of water (steam) has been [tex]\rm 10\;cm^3[/tex].
The final composition of all the gases in the mixture has been [tex]\rm 80\;cm^3[/tex] Nitrogen, [tex]\rm 10\;cm^3[/tex] oxygen, [tex]\rm 5\;cm^3[/tex] carbon dioxide, and [tex]\rm 10\;cm^3[/tex] water (steam). Thus, the correct option is A.
For more information about the composition of gas, refer to the link:
https://brainly.com/question/4391235
Which of the following concepts helps explain the modern technology used in 3D films?
a. retinal disparity
b. convergence
c. overlap (interposition)
d. stroboscopic movement
Answer:
a.
Explanation:
what are metalloids?
Answer:
a type of chemical element whose properties are intermediate between those of metals and nonmetals.
a stone of 1kg is thrown with a velocity of 20m/s and comes to rest after travelling a distance of 50 m. calculate the force exerted on the object.
Answer:
Force = -4N
Explanation:
Given the following data;
Mass = 1kg
Initial Velocity = 20m/s
Distance = 50m
To find the acceleration;
We would use the third equation of motion;
Since, it comes to rest, its final velocity is zero (0).
V² = U² + 2as
Substituting into the equation, we have;
0 = 20² + 2*a*50
-400 = 100a
a = -400/100
a = -4m/s²
Now to find the force exerted
Force = mass* acceleration
Force = 1*(-4)
Force = -4N
in a hydraulic press, a force of 20N is applied to a piston of 0.20m2 what is the pressure transmitted through the liquid?
Answer:
,
Explanation:
I need help!!! What is the answer!!
Answer:
A I think hope it helps!!
TB 70 states that to determine acceleration 1 or 2 things must change. What must change for acceleration to occur?
Answer:
Revise
Test
1
2
3
4
5
6
7
Newton’s Second Law
Unbalanced forces
When the forces acting on an object do not balance, the resultant force will cause the object to accelerate in the direction of the resultant force.
In other words, a resultant force on a body will cause it to change its velocity. This simply means that unbalanced forces will cause:
acceleration
deceleration
change in direction
Explanation:
Select the community facility which typically has a variety of offerings for physical activity like team sports, exercise classes, and swimming.
Bowling Alley
Golf Course
Skate Park
YMCA
Answer:
YMCA
Explanation:
i know everything ;)
Answer: It should be YMCA if im not wrong i took the test a while back.:)
Explanation:
Most energy obtained from water is converted from _____.
groundwater
tidal generators
waterfalls
potential energy behind dams
Answer: potential energy behind dams
Explanation:
groundwater, tidal generators, and waterfalls don't produce enough kinetic energy.
Describe how you would draw a diagram that shows the electric field between two particles that
attract each other.
Answer:
draw the two atomic structures and then focus in on the electrons either gaining or losing and draw them with arrows and dots
Explanation:
i got a 5/5
20 characters
3. A 900 kg car has a velocity of 22.0 m/s.
a. Find the momentum (p) of the car.
Given:
m=
V=
Unknown:
P=
Solution:
p = mv
(IT IS NOT A Multiple choice question)
Answer:
19800kgm/s
Explanation:
Given parameters:
Mass of car = 900kg
Velocity = 22m/s
Unknown:
Momentum of the car = ?
Solution:
The momentum of a body is the quantity of motion it possess.
So;
Momentum = mass x velocity
So;
Momentum = 900 x 22 = 19800kgm/s
As particles of matter move faster, an object's
increases.
particle arrangement
temperature
O particle attraction
O potential energy
Answer:
temperature
Explanation:
The movement of particles in an object is directly proportional to the temperature of the object. As the temperature increases, the kinetic energy increases too. This makes the last option (potential energy) incorrect.
The increased kinetic energy results to particles moving farther from each other, which means the particle attraction becomes weaker. This makes the third option (particle attraction) incorrect.
The particle arrangement shows the particles being widely separated. Therefore the arrangement decreases because they become less intact. This makes the first option (particle arrangement) incorrect.
approaching a dangerous intersection the driver slows her car from 40 meters per second to 15 meters per second in 5 seconds what is the acceleration
Answer:
- 5 m/s^2
Explanation:
Givens
vi = 40 m/s
vf = 15 m/s
t = 5 seconds
Formula
a = (vf - vi)/t
a = (15 - 40)/5
a = -25/5
a = - 5 m/s^2
Don't be bothered by the minus sign. It just means she is slowing down.
Please Help Me!!!!!!
Answer:
a.
Explanation:
When an unbalanced force acts on an object
Answer:
What is the question?
Explanation:
I can help you but if you ask!
What is a positive component of Heath called:
Answer:
vegetables food, sport sport sport
Explanation:
????!!!!
Find an everyday situation that involves density or buoyancy and explain it.
Answer:
Explanation:
Swimming. When you go swimming, your body floats but somewhat sinks as well because we weigh less when we're in the water. We are less dense.
Or taking a bath, the soap sinks to the bottom and the washcloth somewhat floats and sinks because of the air trapped in the middle. But the rest of the washcloth is sinking because it's absorbed the water which makes it denser.
Brainliest??
A 1,100 kg car comes uniformly to a stop. If the vehicle is accelerating at 1.2 m/s", which
force is closest to the net force acting on the vehicle?
Answer:
Gravitaitional pull
Explanation:
Guessing
A 100w lightbulb is on for 30 seconds. How much energy was transferred?
A student rides a bicycle for 15 miles in 3 hours. What is the student's speed? What else would you need to know for Velocity?
Answer:
5 miles per hr.
Explanation:
15/3=5 miles 3/3=1 hour
not too sure about velocity bruddah.
Answer:
11 minutes 60 seconds per mile
7 minutes 27.39 seconds per kilometer
5 miles/hour
8.05 kilometers/hour
134.11 meters/minute
2.24 meters/second
Explanation:
5 miles per hour :)
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Acceleration Due to Gravity - Free Fall
V=V;+gt
vir initial velocity (m/s)
=final velocity (m/s)
g=gravity (10 m/s2)
t = time (s)
1. What is the velocity of a dropped object after it has fallen
downward for 3.0s?
V=V;+gt
Vi = 0
8 = 10
t = 3
2. A brick is thrown down off a bridge with a velocity of 5 m/s. What
is its velocity after it has fallen for 2 seconds?
I
3. An arrow is launched straight up from the ground. It reaches its
highest point in 6 s. What velocity was it released at?
a b c d
A V=V+gt
dhehehdhehdhshehehehehehe
Which has more kinetic energy, a basketball rolling at a walking pace or a baseball rolling at the pace of someone running? How could we find out ?
Answer:
answer 2 because the baseball has less mass then the 1st one
The grocery store is 20 miles away
from where you live. You drive your
car and it takes .5 hours to get there.
What was your rate of speed?
Answer:
40mph
Explanation:
20miles .5 miles away if you go 20 mph you get there in a hour soo if you double to 40 mpg you get there in 0.5
Answer:
40 mph
Explanation:
you went 20 miles in half a hour, multiply twenty by 2 and you get 40
Fish have gills that-
A. Help regulate body temperature
B. Take in oxygen needed for survival
C. Help maintain balance in the water column
D. Obtain carbon dioxide from water for survival
Answer:
B) Take in oxygen needed for survival
Explanation:
Even though fish can live their lives underwater, they still need oxygen to “breathe”
How far would a car traveling at a speed of 35 miles per hour if it traveled for 3 hours?
Answer:
105
Explanation:
Simple math, 35x3=105.
Answer:
105
Explanation:
multiply your time by speed to get distance
Tonya is riding a motorcycle that goes from 30 m/s to 75 m/s in 5s. She is heading south to Florida. What is her acceleration?