Answer:
about 30.714degC
Explanation:
Assuming
specific heat of water at 4200 J/kg * K
specific heat of aluminum 900 J/kg * K
(actual values to higher precision differ, and also change slightly with temperature).
To raise the aluminum's temp by 1K we need 900J * (210g / 1kg) = 189J
189J given by the water decreases its temp by 1K * (189J / 4200J) * (1kg / 550g) = 0.0(81)K.
So every K the temp of aluminum rises, 0.0(81)K falls the temp of the water.
At a difference of (32degC - 15degC) = 17K, we infer the temp will balance out after 17K / (1K + 0.0(81)K) "steps", so about 15.714.
The final temperature will be around 30.714degC
The final temperature of the water-aluminum mixture is 30.7 ⁰C.
The given parameters;
mass of the water, = 550 ginitial temperature of the water, = 32⁰Cmass of the aluminum, 210 ginitial temperature of the aluminum = 15⁰ Cspecific heat capacity of water = 4.184 J/g⁰Cspecific heat capacity of aluminum = 0.9 J/g⁰CThe final temperature of the mixture is determined by applying the principle of conservation of energy;
Heat lost by the water = Heat gained by the aluminum
[tex]mc_w \Delta t = mc_{AL} \Delta t\\\\550 \times 4.184 \times (32 - t) = 210\times 0.9 \times (t - 15)\\\\73638.4 - 2301.2t = 189t - 2835\\\\76473.4 = 2490.2t\\\\t =\frac{76473.4}{2490.2} \\\\t = 30.7 \ ^0C[/tex]
Thus, the final temperature of the water-aluminum mixture is 30.7 ⁰C.
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A boat pulls an inner tube behind it using a rope. The rope exerts a force 155 N on the inner tube at an angle of 5.88 above the horizontal. What are the horizontal and vertical components of this force?
Answer:
154 N horizontal (to the right) 15.9 N vertical (up)
Explanation:
I got it right :)
Activity: Is it the same?!
Reflection of light (and other forms of electromagnetic radiation) occurs when the waves encounter a surface or other boundary that does not absorb the energy of the radiation and bounces the waves away from the surface. The simplest example of visible light reflection is the surface of a smooth pool of water, where incident light is reflected in an orderly manner to produce a clear image of the scenery surrounding the pool. Throw a rock into the pool (see Figure 1), and the water is perturbed to form waves, which disrupt the reflection by scattering the reflected light rays in all directions.
Some of the earliest accounts of light reflection originate from the ancient Greek mathematician Euclid, who conducted a series of experiments around 300 BC, and appears to have had a good understanding of how light is reflected. However, it wasn't until a millennium and a half later that the Arab scientist Alhazen proposed a law describing exactly what happens to a light ray when it strikes a smooth surface and then bounces off into space.
In this activity you will be working as an engineer that is working to modify different kinds of digital cameras and to study the effect of changing incident angle on the reflected angle.
Method
Explain the steps of your experiment and identify the scientific variables:
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
• Independent Variable
----------------------------------------------------------------------------------------------------------------
• Dependent Variable
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
if anyone does ib myp 3. pleaseeee helppp im gonnnnaaa fail.
sciences by concept myp 3 formative assesment.
im giving 50 points please just help meeeeeeeeeeee
Answer:r other boundary that does not absorb the energy of the radiation and bounces the waves away from the surface. The simplest example of visible light reflection is the surface of a smooth pool of water, where incident light is reflected in an orderly manner to produce a clear image of the scenery surrounding the pool. Throw a rock into the pool (see Figure 1), and the water is perturbed to form waves, which disrupt the reflection by
Explanation:
Activity: Is it the same?!
Reflection of light (and other forms of electromagnetic radiation) occurs when the waves encounter a surface or other boundary that does not absorb the energy of the radiation and bounces the waves away from the surface. The simplest example of visible light reflection is the surface of a smooth pool of water, where incident light is reflected in an orderly manner to produce a clear image of the scenery surrounding the pool. Throw a rock into the pool (see Figure 1), and the water is perturbed to form waves, which disrupt the reflection by scattering the reflected light rays in all directions.
Some of the earliest accounts of light reflection originate from the ancient Greek mathematician Euclid, who conducted a series of experiments around 300 BC, and appears to have had a good understanding of how light is reflected. However, it wasn't until a millennium and a half later that the Arab scientist Alhazen proposed a law describing exactly what happens to a light ray when it strikes a smooth surface and then bounces off into space.
In this activity you will be working as an engineer that is working to modify different kinds of digital cameras and to study the effect of changing incident angle on the reflected angle.
Method
Explain the steps of your experiment and identify the scientific variables:
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
• Independent Variable
----------------------------------------------------------------------------------------------------------------
• Dependent Variable
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
if anyone does ib myp 3. pleaseeee helppp im gonnnnaaa fail.
sciences by concept myp 3 formative assesment.
im giving 50 points please just help meeeeeeeeeeee
describe briefly the potential energy it has ( roller coaster)
Answer:
The energy that it starts with at the top of the inclinede Plane
Explanation:
Hope I helped:)
Need help as fast as possible please
I will mark BRAINLIST only for correct answers babes :)
Thank you!
Answer:
1) Image
2) virtual
i hope its right ! :)
Explanation:
The type of energy that a moving object has that increases when the speed of that object increases and is called ____.
Answer:
no
Explanation:
Answer:
The answer is Kinetic Energy.
Explanation:
Kinetic energy basically means energy of mass that's in motion.
A runner weighing 70 kg, moving at a speed of 8.8 m/s, rounds
a bend with a radius of 25 m. What is the centripetal force
needed to keep this runner on the curve?
a 250 N
b 100 N
C 217 N
d 158 N
Answer:
217 N
Explanation:
Answer:217N
Explanation:
SOS: I completely forgot what net force is...
What is the kinetic energy of a 2.1kg baseball and is traveling at 10 m/s?
Answer:
Explanation:
KE = 1/2mv^2
KE = 1/2(2.1)(10)^2
KE=105N
34 Which of these human characteristics shows discontinuous variation?
A blood group
B hair color
C height
D weight
Answer:
Blood group
Explanation:
Answer:
A. Blood group.
Explanation:
They could purely random genetic changes.
Which statement accurately describes viscosity?
A. A liquid with larger molecules resists movement more than a liquid with smaller molecules does.
B. A material slows or completely blocks the flow of electrons through it.
C. A material with relatively weak bonds between its particles can be shaped into a thin sheet.
D. Attractive forces between molecules at the surface cause a liquid to resist spreading out.
The statement that accurately describes viscosity is option D: Attractive forces between molecules at the surface cause a liquid to resist spreading out. Option D
Viscosity is a measure of a fluid's resistance to flow. It quantifies how easily a fluid can be deformed or how readily it flows. In liquids, viscosity arises from the cohesive forces between molecules.
When molecules in a liquid are attracted to each other, they tend to stick together and resist movement. At the surface of the liquid, there is a greater degree of attractive forces between the molecules since they have fewer neighboring molecules to interact with.
This surface tension creates a resistance to the spreading out of the liquid and causes it to exhibit a more rounded or droplet-like shape.
The attractive forces between molecules at the surface of a liquid contribute to the cohesive forces within the liquid as a whole, resulting in a higher viscosity.
The stronger the attractive forces between the molecules, the higher the viscosity of the liquid. For example, honey has a higher viscosity compared to water because the molecules in honey have stronger attractive forces, making it flow more slowly.
Option A is not an accurate description of viscosity. Viscosity is not solely determined by the size of the molecules in a liquid but rather by the strength of the attractive forces between the molecules.
Option B describes electrical conductivity, not viscosity. It refers to a material's ability to slow down or impede the flow of electrons.
Option C describes the property of malleability, not viscosity. It refers to a material's ability to be shaped into a thin sheet without breaking.
Therefore, option D accurately describes viscosity by highlighting the role of attractive forces between molecules at the surface of a liquid in resisting the spreading out of the liquid
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What element atomic number is in Group 17 and Period 6?
[tex] \\ [/tex]
The halogen elements are the six elements in Group 17 of the periodic table. Group 17 is the second column from the right in the periodic table and contains six elements: fluorine (F), chlorine (Cl), bromine (Br), iodine (I), astatine (As), and tennessine (Ts).
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Hope It Helps!
What is physical activity?
Answer:
answer is b. any movement that uses your muscles and requires energy
Explanation:
how gumamela reproduced
An incident ray traveling in a slower medium strikes a boundary with a faster medium. What happens when its angle of incidence is greater than the critical angle?
A.
The refracted ray makes an angle of 90°.
B.
There is total internal reflection in the faster medium.
C.
There is total internal reflection in the slower medium.
D.
The reflected ray makes an angle of 90°.
E.
The reflected ray makes an angle equal to the critical angle.
Answer:
D. The reflected ray makes an angle of 90°.
Explanation:
Why does thunder come before lightning?
Answer:
That is because light travels much faster than sound waves. … It takes approximately 5 seconds for the sound to travel 1 mile.
Explanation:
If the thunder follows the lightning almost instantly, you know the lightning is too close for comfort.
what do you call a material which is capable of reducing friction when applied between moving parts?
Answer:
The material is called a Lubricant.
Hope it helps! ☺️
which of the following instrument measure time most accurately
a pendulum clock
b sundial
c quartz watches
d sand clock
An object has a force of 88N to the right Wth an acceleration of 8 m/s2 to the right. What is the mass of the object? (mass has a unit of kg.)
Answer:
your answer is 11
Explanation:
To what temperature will a 50.0 g piece of glass raise if it absorbs 5275 joules of heat and its specific heat capacity is 0.50 J/g°C? The initial temperature of the glass is 20.0°C.
Answer:
Final temperature, T2 = 131895°C
Explanation:
Given the following data;
Mass = 50g
Initial temperature = 20°C
Quantity of heat = 5275J
Specific heat capacity = 0.50 J/g°C
To find the final temperature;
Heat capacity is given by the formula;
[tex] Q = mcdt[/tex]
Where;
Q represents the heat capacity or quantity of heat.
m represents the mass of an object.
c represents the specific heat capacity of water.
dt represents the change in temperature.
Making dt the subject of formula, we have;
[tex] dt = \frac {Q}{mc} [/tex]
Substituting into the equation, we have;
[tex] dt = \frac {5275}{50*0.50} [/tex]
[tex] dt = \frac {5275}{25} [/tex]
dt = 131875°C
Now, the final temperature T2 is;
But, dt = T2 - T1
T2 = dt + T1
T2 = 131875 + 20
T2 = 131895°C
The final temperature when a glass piece absorbs heat 5275 joules will be T2= 231 C
What is heat capacity?
The heat capacity is defined as the amount of heat any material can absorb when the temperature is changed to unit quantity.
Given the following data;
Mass = 50g
Initial temperature = 20°C
Quantity of heat = 5275J
Specific heat capacity = 0.50 J/g°C
To find the final temperature;
Heat capacity is given by the formula;
[tex]Q= mc(T_2-T_1)[/tex]
Where;
Q = represents the heat capacity or quantity of heat.
M= represents the mass of an object.
C= represents the specific heat capacity
T1= initial temperature
T2 = Final temperature
Substituting into the equation, we have;
[tex]Q=mc(T_2-T_1)[/tex]
[tex](T_2-T_1)=\dfrac{Q}{mc}[/tex]
[tex](T_2-T_1)=\dfrac{5275}{50\times 0.50}[/tex]
[tex]T_2=211+T_1[/tex]
[tex]T_2=211+20=231 ^oc[/tex]
Thus the final temperature when a glass piece absorbs heat 5275 joules will be T2= 231 C
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Question 7 of 10
Which observation is evidence of refraction in this photo?
A. The top of the man's head appears disconnected from the rest of
his head.
B. The man's arm is clearly seen under the water.
C. The snorkel in the man's mouth appears yellow.
a
D. The water in which the man is swimming is transparent.
Answer: it is A
Explanation: A p e c
A protein-digesting enzyme when mixed with starch solution would
Answer:
It would produce fat..........
8. If Bulb 8 burns out, how will the remaining bulbs be affected?
1
2
3
4
5
6
7
8
An object has a mass of 3 kg and an acceleration 7 m/s2to the left. What is the force?
Answer:
your answer is 21 n
Explanation:
A skateboarder coasts a distance of 20 meters in 4 seconds. What is the person's speed?
Answer:
5 m/s
Explanation:
The formula of speed is : distance/time taken.
The skateboarder covered a distance of 20 meters in 4 seconds. So,
Distance = 20 meters
Time Taken = 4 seconds
Speed = 20/4 = 5 m/s
The Sankey diagram shows the energy transfers in an LED light bulb.
(look at the attached photo)
Answer:
B)20%
Explanation:
only the 2j of energy is getting used out of 10j.all other 8j are wasted as heat.
therefore the efficiency=2/10*100=20
A saw becomes warm when it is used to cut a log of wood.Give reason
Explanation:
a part of the kinetic energy of the sun is converted into heat as it cuts the log of wood it is due to this heat that becomes worm .Thus, kinetic energy of such changes into heat
What do seismic waves and sound waves have in common?
Can someone help with this? (Picture above)
Answer:
Element #1
protons = 1
neutrons = 0
electrons = 1
atomic number = 1
atomic mass = 1
Element #2
protons = 2
neutrons = 2
electrons = 2
atomic number = 2
atomic mass = 4
Element #3
protons = 3
neutrons = 3
electrons = 3
atomic number = 3
atomic mass = 6
Explanation:
Atomic mass = proton = electrons at neutral state
please give me brainliest if my answer is helpful
Energy in an ecosystem's energy pyramid always flows from __________.
A. decomposers to producers
B. producers to consumers
C. consumers to producers
D. decomposers to consumers
The Answer is B because primary consumers need to get their food from plants.
Answer:
The Answer is B because primary consumers need to get their food from plants
Explanation:
A man pushed the box with a force of 20 N. The mass of the box doubled, but he still pushed with a force of 20 N.
Which option describes how the acceleration of the box after the mass was doubled?
a) The acceleration is 2x the original acceleration
b) Acceleration is 4x the original acceleration
c) Acceleration is 1/2x the original acceleration
d) Acceleration is 1/4x the original acceleration
Answer:
Option (c) Acceleration is 1/2x the original acceleration
Explanation:
To know the the correct answer to the question, we shall determine the acceleration of the box in each case.
Case 1:
Mass (m) = m
Force (F) = 20 N
Acceleration 1 (a₁) =?
F = ma₁
20 = m × a₁
Divide both side by m
a₁ = 20 / m
Case 2:
Mass (m) = 2m
Force (F) = 20 N
Acceleration 2 (a₂) =?
F = ma₂
20 = 2m × a₂
Divide both side by 2m
a₂ = 20 / 2m
a₂ = 10 / m
Finally, we shall determine the acceleration of the box after the mass was doubled. This can be obtained as illustrated below:
Acceleration 1 (a₁) = 20 / m
Acceleration 2 (a₂) = 10 / m
a₂ : a₁ = 10 / m : 20 / m
a₂ / a₁ = 10 / m ÷ 20 / m
a₂ / a₁ = (10 / m) × (m / 20)
a₂ / a₁ = ½
Cross multiply
a₂ = ½a₁
Thus, the acceleration of the box after the mass was doubled is ½ times the original acceleration.
