When equal mass of hot water and oil at the same temperature are allowed to cool water cools slower than the oil why?
Answers
It is because water has a higher heat capacity as compared to the heat capacity of oil.
The amount of heat that must be applied to an object in order to cause a unit change in temperature is known as the heat capacity or thermal capacity of that object. Heat capacity is measured in joules per kelvin (J/K), the SI unit.
Heat capacity is an example of extensive property. A physical quantity which is an extensive property has a value that is proportional to the size of the system it describes or the amount of matter present in the system. C stands for the heat capacity of an object.
Because water has a higher specific capacity than oil and must expend more energy to cool down, it does so more slowly when two equal masses of hot water and oil are allowed to cool.
Therefore, When the equal mass of hot water and oil at the same temperature is allowed to cool water cools slower than the oil.
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Related Questions
You are designing a spaceship, and you want it to have an artificial gravity of 9.8 m/s2 at the center of mass of an average human. The average human has a center of gravity that is about 90 cm above their feet. Through other engineering constraints, you have determined the rotational speed of the ship to be 0.2 rad/s. What should the radius of the ship be (in m)? (Round your answer to the nearest whole number!)
Answers
Answer:
The tangential acceleration is 0 m/s².
Explanation:
Answer:
The tangential acceleration is 0 m/s².
Explanation:
differences between distance and displacement.
Answers
Your car can brake with a deceleration of 6 m/s2. The car is initially going at 40 m/s.
a) How long will it take the car to come to a full stop?
b) If the car is 5 meters long, about how many car lengths should be kept between you and the car in front of you (assume the car in front of you comes to a stop immediately).
Answers
The time of motion of the car before coming to a full stop is 6.67 s.
The car length that should be kept between you and the car is 138.33 m.
The given parameters;
acceleration of the car, a = - 6m/s²initial velocity of the car, u = 40 m/sThe time of motion of the car before coming to a full stop is calculated as follows;
\(v = u + at\\\\when \ the \ car \ stops , \ v = 0\\\\0 = u + at\\\\0 = 40 -6t\\\\6t = 40\\\\t = \frac{40}{6} = 6.67 \ s\)
The distance traveled by the car before coming to a full stop;
\(v^2 = u^2 + 2as\\\\0 = u^2 + 2as\\\\0 = 40^2 -2(6)s\\\\0 = 40^2- 12s\\\\12s = 1600\\\\s = \frac{1600}{12} \\\\s = 133.33 \ m\)
The car length that should be kept between you and the car is calculated as;
car length in front of you = 5 m + 133.33 m = 138.33 m
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Which two words, in order, correctly complete the statement?
Liquids have a definite but take the of their container.
A
mass; volume
B
volume; shape
С
temperature; mass
D
shape, temperature
Answers
liquid doesn’t have a definite shape or temperature
Two objects, each with a mass of 5•10^5 kg, have a gravitational force of 1.6 N between them. To the nearest meter, what is the distance between the two objects?
A. 30 m
B. 3 m
C. 100 m
D. 10 m
Please help will mark brainliest
Answers
Answer:
3m
Explanation:
Fg=Gm1m2/r^2
r^2=Gm1m2/Fg
r^2=(6.67*10^-11)(5*10^5)(5*10^5) /1.6
r^2=10.42
r=3m
What rules are used to balance a chemical equation?
Answers
Answer:
Count the number of hydrogen and oxygen atoms on each side of the arrow.
Explanation:
Mr. Red Herring was found shot dead in his backyard. He was about a foot away from his back porch, lying next to his personal handgun. A bloody footprint was also found on the porch. Analysis of a bullet found nearby suggests that, based on the striation marks, the bullet that killed Herring came from a gun discarded in a nearby trash can. He apparently had a date that night with Mrs. Scarlet. Based on various evidence, the forensics team also created a digital rendering of the crime.
Answers
An example of demonstrative evidence is the digital rendering of the crime scene that shows where the gun was fired from. That is option B.
What is demonstrative evidence?A demonstrative evidence is the type of evidence that is being represented using visuals to help enhance the facts of a claim made against an opponent in the law court.
The components of demonstrative evidence include the following:
photos, x-rays, videotapes, movies, sound recordings, diagrams, forensic animation,maps and drawings.Based on the various evidence presented concerning the sudden death of Mr. Red Herring who was short dead in his backyard, the demonstrative evidence is when the forensics team also created a digital rendering of the crime showing where the gun was shot.
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Options of question:
In this story, which is an example of demonstrative evidence?
The fingerprint that showed that Mrs. Scarlet handled the gun
The digital rendering of the crime scene that shows where the gun was fired from
The report about bullet striations that prove the shot came from the discarded weapon
The DNA evidence gathered from the blood splatters
calculate the momentum of a car which has a mass of 730kg and is moving at a velocity of 20m/s
Answers
Answer:
14600 kgm/sExplanation:
The momentum of an object can be found by using the formula
momentum = mass × velocity
From the question we have
momentum = 730 × 20
We have the final answer as
14600 kgm/sHope this helps you
A 0.25 kg ball moving north at 7.7 m/s experiences an impulse of 2.5 N-s acting due east. What is the magnitude
and direction of the ball's new velocity?
Answers
The new velocity of the ball is 17.7 m/s north-east.
What is velocity?Velocity can be defined as the rate of change of displacement.
The S.I unit of velocity is m/s.
To calculate the magnitude and direction of the new velocity, we use the formula below.
Formula:
m(v-u) = I.............. Equation 1Where:
m = mass of the ballv = New velocity of the ballu = Initial velocity of the ballI = ImpulseFrom the question,
Given:
m = 0.25 kgu = 7.7 m/sI = 2.5 N-sSubstitute these values into equation 1
0.25(v-7.7) = 2.5v-7.7 = 10v = 10+7.7v = 17.7 m/s north-eastHence, the new velocity of the ball is 17.7 m/s north-east.
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A beaker containing water at 80°C is placed on a piece of aluminum at 25°C. How will thermal energy transfer? O by conduction from the aluminum to the beaker O by convection from the aluminum to the beaker O by convection from the beaker to the aluminum O by conduction from the beaker to the aluminum
Answers
The thermal energy transfer will occur by convection from the aluminium to the beaker.
Thermal energy can be defined as the energy held in a system that is accountable for the overall temperature of the system.
Conduction is the process by which heat energy is transferred from one material or substance to another.
Convection is the transfer of heat in the fluid medium. e.g when a fluid is heated, heat energy is transferred into the fluid which causes a rise in the temperature of the fluid.
Since water is a fluid medium, the thermal energy transfer will occur by convection from the aluminium to the beaker.
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1. What is the direction of the induced current in the front side of the coil?
a. Left
b. Right
c. Up
d. down
2. in what direction is the magnet moving?
a. Away
b. Toward
c. Up
d. Down
Answers
1. What is the direction of the induced current in the front side of the coil?
a. Left
b. Right
c. Up
d. down2. in what direction is the magnet moving?
a. Awayb. Toward
c. Up
d. Down
Hope it helps
To determine the direction of the induced current in the front side of the coil and the direction of the magnet's movement, we can use Faraday's law of electromagnetic induction, which states that an induced current is produced in a conductor when it is exposed to a changing magnetic field.
1.) Direction of the induced current in the front side of the coil:
The direction of the induced current can be determined using Lenz's law, which states that the induced current will flow in a direction that opposes the change that caused it.
If the magnet is moving away from the front side of the coil:
The magnetic field through the coil is decreasing. According to Lenz's law, the induced current will flow in a direction to create a magnetic field that opposes this decrease. Applying the right-hand rule for the direction of the magnetic field around a wire, we can determine that the induced current in the front side of the coil will flow counterclockwise when viewed from the front. Therefore, the answer is option a. Left.
2.) If the magnet is moving toward the front side of the coil:
The magnetic field through the coil is increasing. According to Lenz's law, the induced current will flow in a direction to create a magnetic field that opposes this increase. Applying the right-hand rule for the direction of the magnetic field around a wire, we can determine that the induced current in the front side of the coil will flow clockwise when viewed from the front. Therefore, the answer is option b. Right.
Direction of the magnet's movement:
Based on the given information, the options provided (Away, Toward, Up, Down) are not sufficient to determine the exact direction of the magnet's movement. More specific information is needed to determine the direction of the magnet's movement.
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You want to create a space station that is 50 meters in radius. If you want it to simulate Earth's gravitation, how fast must it go?
Answers
Answer:
w = 0.196 rad / s
Explanation:
To generate an acceleration similar to that of the earth, the station's centripetal acceleration must be equal to the acceleration due to gravity.
a_c = v² / r = w² r
a_c = g
we substitute
g = w² r
w² = g / r
w = \(\sqrt { \frac{g}{r} }\)
let's calculate
w = √9.8/50
w = 0.196 rad / s
therefore the station must rotate at that angular velocity so that the acceleration in the outer wall is equal to the ratio of gravity
A skier starting from rest accelerates in a straight line down a 43,000 m slope at 1 m/s. How fast were they moving after 5 s?
Answers
Answer:
5m/s
Explanation:
The skier accelerates at 1 m/s, then, the acceleration is:
\(a=1\frac{m}{s^2}\)
to find the speed after 5 seconds you use the following formula:
\(a=\frac{v-v_o}{t}\)
but vo = 0m/s because the skier is at rest at the beginning.
You do v the subject of the formula:
\(v=at=(1\frac{m}{s^2})(5s)=5\frac{m}{s}\)
hence, the velocity is 5m/s
How does a concentration gradient work? How do solutes and other substances move across the cell membrane? Explain.
Answers
A concentration gradient is created when the concentration of a molecule or solute differs on either side of a cell membrane, and this difference drives the movement of molecules and solutes across the membrane. How do solutes and other substances move across the cell membrane? Molecules and ions can diffuse or move across a cell membrane from areas of high concentration to areas of low concentration, which is known as simple diffusion.
They can also be transported by transporters, which are membrane proteins, and the transporters can be passive or active carriers, depending on the energy requirements of the transporter. Active transport, which involves the expenditure of metabolic energy to drive solute transport across a membrane against the concentration gradient, is a type of active carrier. Facilitated diffusion occurs when a protein facilitates the movement of a solute down a concentration gradient; this process is similar to active transport but does not require metabolic energy.
Explanation of the movement of solutes across the cell membrane: During simple diffusion, the movement of solutes occurs across a membrane that has a concentration gradient. Because the membrane is selectively permeable, only certain molecules can move across it. Molecules that are small and uncharged can easily pass through the membrane, while larger or charged molecules are often blocked. Because the solute moves down a concentration gradient, it does not require energy, and it can continue to move across the membrane until the concentrations on both sides of the membrane are equal.
The movement of solutes in facilitated diffusion, which involves the movement of molecules through membrane channels or carrier proteins, is somewhat similar to simple diffusion. Carrier proteins, in particular, help to move molecules through the membrane by undergoing a change in shape as the molecules move across it.
Active transport, which involves the movement of molecules against a concentration gradient, is a process that requires energy. Energy is required for the solute to move across the membrane, and the energy can come from either ATP hydrolysis or the electrochemical gradient of the molecule. The process of active transport is essential for maintaining the balance of ions and molecules within a cell.
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Concentration gradient refers to the gradual variation in concentration of solutes or other substances in a solution that occurs in regions that are separated by a membrane or a barrier. Substances tend to move from an area of higher concentration to an area of lower concentration, down the gradient. This process is called diffusion.
Here's how it works:Substances in a high concentration move toward regions of lower concentration by crossing the membrane or barrier. This happens until the concentration of the substance is uniform throughout the solution.The rate of diffusion across the membrane is influenced by the concentration gradient. A steep gradient results in a faster rate of diffusion, while a shallow gradient results in a slower rate of diffusion.Substances can move across the cell membrane through different mechanisms, depending on their chemical and physical properties. Lipid-soluble substances can diffuse across the lipid bilayer of the membrane, while large and hydrophilic substances require specialized transport proteins to cross the membrane. For example, ions such as sodium, potassium, and calcium move across the membrane through ion channels, while glucose and amino acids move across through transporters. Overall, the movement of solutes and other substances across the cell membrane is an important process that allows cells to maintain a balance of nutrients and other vital components within the cell.
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Determine the present value of the following single amounts (FV of $1, PV of $1, FVA of $1, PVA of $1, FVAD of $1 and PVAD of $1)
FV= $20,000 I=7% N=10 PV= ?
FV= $14,000 I=8% N=12 PV= ?
FV= $25,000 I=12% N=20 PV= ?
FV= $40,000 I=10% N=8 PV= ?
Answers
The present value of the following single amounts are as follows;
PV for FV = $20,000, I =7%, N =10 years is $10,155.84
PV for FV = $14,000, I =8%, N =12 years is $4,489.92
PV for FV = $25,000, I =12%, N =20 years is $2,590.11
PV for FV = $40,000, I =10%, N =8 years is $18,520.89.
Future value (FV) =$20,000,
Interest rate (I) =7%,Time (n) = 10 years
The present value (PV) can be calculated as follows;
PV = FV / (1 + i)n = 20000 / (1 + 0.07)10PV = 20000 / 1.96715PV = $10,155.84
Future value (FV) =$14,000,
Interest rate (I) =8%,
Time (n) = 12 years
The present value (PV) can be calculated as follows;
PV = FV / (1 + i)n = 14000 / (1 + 0.08)12PV = 14000 / 3.12159PV = $4,489.92
Future value (FV) =$25,000,
Interest rate (I) =12%,Time (n) = 20 years
The present value (PV) can be calculated as follows;
PV = FV / (1 + i)n = 25000 / (1 + 0.12)20PV = 25000 / 9.64632PV = $2,590.11
Future value (FV) =$40,000,Interest rate (I) =10%,Time (n) = 8 years
The present value (PV) can be calculated as follows;
PV = FV / (1 + i)n = 40000 / (1 + 0.1)8PV = 40000 / 2.15893PV = $18,520.89
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Which is NOT a part of transverse waves?
A. wavelength
B. trough
C. compression
D. crest
Answers
Answer:
C. Compression
Explanation:
✧✧✧EMOTIONAL DAMAGE✧✧✧
kleann
Assuming constant acceleration what would be the speed at 14s ?
Answers
We see here that assuming constant acceleration, the speed at 14s will be 70km/hr.
What is speed?Speed is a measure of how fast something is moving, typically measured as distance traveled per unit of time. It is a scalar quantity, meaning that it has magnitude but no direction.
The SI unit for speed is meters per second (m/s), but it can also be expressed in other units such as kilometers per hour (km/h), miles per hour (mph), feet per second (ft/s), and so on.
The formula for calculating speed is:
Speed = Distance / Time
It is clear from the graph that as time increases, there is an increase in speed.
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What happens to an object's gravitational potential energy as it falls from some height?
Answers
Answer:
Decreases
Explanation:
As an object falls from some height, the gravitational potential energy of the object decreases.
Potential energy is the energy due to the position of a body.
The potential energy is mathematically expressed as:
Potential energy = mass x acceleration due to gravity x height
So, potential energy is directly proportional to mass and height.
The higher the mass and height, the more the potential energy.
Could someone please explain isotopes, and what they do/are? If not thats fine, thank you
Answers
Answer:
each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei, and hence differ in relative atomic mass but not in chemical properties; in particular, a radioactive form of an element.
"some elements have only one stable isotope"
Explanation:
there ya go! Pls give me brainliest!
Cardiorespiratory endurance involves these systems
A.respiratory and digestive
B.digestive and circulatory
C.circulatory and respiratory
Answers
Answer:
C.circulatory and respiratory
Explanation:
Cardiography is upon the heart and its cardiac muscles whereas respiratory is upon the lungs
The steps for conducting a basic search are listed below. Put the steps in the correct order.
step 1:
step 2:
step 3:
step 4:
Answers
1.
Navigate to a search engine.
2.
Form a question.
3.
List the keywords.
4.
Enter the keywords and press Enter.
The steps for conducting a basic search are put in the order below:
Step 1. Navigate to a search engine.
Step 2. Form a question.
Step 3. List the keywords.
Step 4. Enter the keywords and press Enter.
What is basic research?Basic research can be used to learn more about a particular issue; it might not produce an idea or a solution, but it can be used to develop theories and scientific understanding.
Fundamental information from basic research can be used to carry out applied research. Applied research is utilized to address relevant, concrete issues. Research into and examination of materials and sources with the goal of establishing facts and drawing new findings.
Therefore, the correct order is:
Step 1. Navigate to a search engine.Step 2. Form a question.Step 3. List the keywords.Step 4. Enter the keywords and press Enter.To learn more about basic research, refer to the link:
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The question is incomplete. Your most probably complete question is given below:
Form a question.
Enter the keywords and press Enter.
Navigate to a search engine.
List the keywords.
What is matter made of ? Will mark as brainliest to answer
Answers
Answer:
Explanation:
All matter is made up of atoms, which are turned up of protons, neutrons and electrons.
They bond together to make up matter
Answer:
Atoms
Explanation:
All matter is made up of atoms, which are in turn made up of protons, neutrons and electrons. Atomess come togetheer to forms molecules, which are the building blocks for all types of matter
Each of the following is a factor that determines radiation injury EXCEPT one. Which one is the EXCEPTION?a. Size of the irradiated areab. Amount of radiationc. Patient genderd. Dose rate
Answers
The factor that determines radiation injury EXCEPT one is c. patient gender.
Factors that determine radiation injuryRadiation injury occurs when a person is exposed to high levels of ionizing radiation. The size of the irradiated area, the amount of radiation, and the dose rate are all factors that determine radiation injury, but patient gender is not. While patient gender may play a role in other aspects of healthcare, it does not determine the amount of radiation injury a person may experience. Therefore, the correct answer is c. Patient gender.
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12. A golf club applies 17,793 N of force to a golf ball and it travels 219.55 m. How much work was done on
the ball?
Answers
The work done on the ball is 1.08 kWh
According to the Definition of work
W= F.s
According to the question,
F = 17,793 N
s= 219.55 m
Work = 3906453.15 J
1 kWh = \(3.6*10^6 J\)
3906453.15 J = \(\frac{3906453.15}{3.6*10^6}\)= 1.08 kWh
Therefore, the Work done on the golf ball is 1.08 kWh
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a bowler releases a 7.0\,\text {kg}7.0kg 7, point, 0, start text, k, g, end text bowling ball from rest to a final velocity of 8.0\,\frac {\text m}{\text s}8.0 s m 8, point, 0, start fraction, start text, m, end text, divided by, start text, s, end text, end fraction. what is the magnitude of the change in momentum of the bowling ball?
Answers
The magnitude of the change in momentum of the bowling ball is 56 kg·m/s.
When a bowler releases a bowling ball from rest and it reaches a final velocity of 8.0 m/s, we can calculate the change in momentum using the formula:
Change in momentum = final momentum - initial momentum
The initial momentum of the bowling ball is zero because it is at rest. The final momentum can be calculated by multiplying the mass of the bowling ball (7.0 kg) by its final velocity (8.0 m/s):
Final momentum = 7.0 kg × 8.0 m/s = 56 kg·m/s
Therefore, the magnitude of the change in momentum of the bowling ball is 56 kg·m/s.
Momentum is a fundamental concept in physics that describes the quantity of motion an object possesses. It is defined as the product of an object's mass and its velocity. The change in momentum of an object is equal to the final momentum minus the initial momentum. In this case, since the bowling ball starts from rest, its initial momentum is zero. The final momentum is calculated by multiplying the mass of the ball (7.0 kg) by its final velocity (8.0 m/s), resulting in a final momentum of 56 kg·m/s. This means that the bowling ball's momentum changed from zero to 56 kg·m/s during its motion.
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PLEASE HELP!! ;) <3 how many degrees of a circle graph would represent carbon monoxide (CO) how many degrees would represent methane (CH4)
thanks
Answers
Answer:
Explanation:
I think it has something to do with their molecular masses, use that and find an equation that deals with angular motion and solve for the angle.
a car of mass 800 kg is travelling at 12m/s the car accelerates over a distance of 240 m there force causing this acceleration is 200 newton determine the work done on the car and its final velocity car
Answers
Answer:
See below
Explanation:
Force X distance = work
200 N * 240 m = 48 000 N-m = 48 000 j
F = ma
200 = 800 a
a = 1/4 m/s^2
d = v t + 1/2 a t^2
12 m/s t + 1/2 1/4 m/s^2 t^2 = 240
shows t = 17 sec (via Quadratic Formula)
final velocity = 12 + at = 12 + 1/4(17) = 16.26 m/s
help me with this one aswell, too confused and tired for this
Answers
what is the symbol for specific latent heat of vaporization
Answers
Answer: L
Explanation: L is the specific latent heat for a particular substance (kJ kg−1 or in BTU lb−1), either Lf for fusion, or Lv for vaporization.
The horizontal surface on which the block of mass 2.2 kg slides is frictionless. The force of 27 N acts on the block in a horizontal direction and the force of 81 N acts on the block at an angle as shown below is the magnitude of the resulting ac celeration of the block? The acceleration of gravity is 9.8 m/s ^ 2
Answers
The magnitude of the resulting acceleration of the block is 6.14 m/s².
The given parameters;
mass of the block, m = 2.2 kghorizontal force on the block, F = 27 Nforce below the horizontal, 81 N at 60⁰The net horizontal force on the block is calculated as follows;
\(F_x = 27 \ - 81 \times cos (60)\\\\F_x = -13.5 \ N\)
The acceleration of the block is calculated as follows;
\(a = \frac{-13.5}{2.2} \\\\a = - 6.14 \ m/s^2\\\\a = 6.14 \ m/s^2 \ to \ the \ left\)
Thus, the magnitude of the resulting acceleration of the block is 6.14 m/s².
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