when heat is supplied to the the system then as per law of thermodynamics we can say
[tex]Q = \Delta U + W[/tex]
here we can say that heat is converted into the internal energy of gas and some work is done by the system after absorbing this heat.
So here when ice is melting the energy is supplied to the ice which converts into the internal energy of the ice.
Here this internal energy is used to break the bond of ice molecules so that its phase will convert from solid to liquid
So here we can say this heat or this internal energy as Latent heat of fusion of ice
So its formula is given as
[tex]Q = mL[/tex]
so here correct answer is
B) Energy is used to break bonds between molecules in ice.
The correct answer is B) Energy is used to break bonds between molecules in ice.
When ice melts, it undergoes a phase transition from solid to liquid at a constant temperature, which is 0°C (32°F) for water at standard atmospheric pressure.
During this process, the kinetic energy of the molecules (which is related to the temperature of the substance) does not increase because the added energy is not going into increasing the speed at which the molecules move.
Once all the ice has melted and the phase change is complete, any additional energy transferred as heat will then go into increasing the kinetic energy of the water molecules, resulting in an increase in temperature.
Therefore, the statement that Energy is used to break bonds between molecules in ice correctly explains why the temperature of melting ice does not change even though energy is being transferred as heat to the ice. The other options do not accurately describe the process occurring during the melting of ice:
A) The potential energy of the molecules does change as the ice melts; it increases as the molecules move further apart.
C) Kinetic energy is not being converted to chemical energy; rather, energy is being used to overcome the potential energy associated with the intermolecular forces.
D) The heat energy is not absorbed and then disappears; it is used to break the intermolecular bonds and is stored as potential energy in the separated molecules.
What energy is being transformed an electric blanket warms a bed on a chilly night
Final answer:
Electrical energy is transformed into thermal energy by an electric blanket to warm a bed. The electric current passes through a heating element in the blanket, where the resistance generates heat to provide warmth.
Explanation:
When an electric blanket warms a bed on a chilly night, electrical energy is being transformed into thermal energy. This process involves the conversion of electricity into heat through the use of a heating element within the blanket. As electricity flows through the heating element, the resistance of the material converts electric energy into heat, which then warms up the bed. This is an example of energy transformation where the desired output is the warming effect, even though some energy may be lost to the environment as part of this process.
Electric blankets are designed to be energy efficient, ensuring that the majority of electric power is converted into heat to keep users warm. This functionality is similar to other devices that transform energy into heat, such as space heaters or waterbed heaters. However, it's worth noting that no process is 100% efficient, and some energy will be lost in the form of waste heat.
How does mass affect the time it takes an object to hit the ground?
For an ideal condition The Mass does not affect the time taken by an object to hit the ground.
As the ground attracts all object with the same acceleration due to gravity 9.8 m/s². so all objects that drop from a certain height hit the ground at same time .
But in real condition there is air resistance present ,due to which objects of different masses take different time to hit the ground.
The table shows the charges and the distance between five different pairs of objects.
If the force between two charges, q, separated by a distance, d, is F, what is the list of the other forces, from greatest to least?
A) Y, Z, W, X
B) Y, W, X, Z
C) Z, Y, W, X
D) Z, X, W, Y
B. Y,W,X,Z is the answer, Hope it helps
Answer : Y > W > X > Z
Explanation :
The electrostatic force is given by :
[tex]F=k\dfrac{q_1q_2}{d^2}[/tex]
k is the electrostatic constant
q₁ and q₂ are charges
d is the distance between them
We will calculate forces one by one :
[tex]F=k\dfrac{q.q}{d^2}=\dfrac{kq^2}{d^2}[/tex]
[tex]W=k\dfrac{q.2q}{d^2}=\dfrac{2kq^2}{d^2}=2F[/tex]
[tex]X=k\dfrac{q.q}{(2d)^2}=\dfrac{kq^2}{4d^2}=\dfrac{F}{4}[/tex]
[tex]Y=k\dfrac{3q.q}{d^2}=\dfrac{3kq^2}{d^2}=3F[/tex]
[tex]Z=k\dfrac{q.q}{(3d)^2}=\dfrac{kq^2}{9d^2}=\dfrac{F}{9}[/tex]
So, the force from greatest to least will be :
Y > W > X > Z
So, the correct option is (B)
Two identical balls are dropped from a tall building, one a few seconds later after the other. Air resistance is not negligible. As the balls fall, the distance between the balls will
a. decrease
b. increase
c. increase then remain constant
d. remain constant
Objects in free fall accelerate due to ______
A. Gravity
B. Momentum
C. Energy
D. Velocity
Answer:
The correct answer is A.
Objects in free fall accelerate due to gravity.
Explanation:
Momentum can help an object to keep its state of motion at a constant velocity when no external force is applied. It can never accelerate the object.
According to the laws of motion, we know that acceleration is produced in a body only when a Force is applied in the direction of motion of body.
During a free fall, only the force of gravity is acting on an object and that too in the direction of its motion. Hence, the acceleration produced in a free falling object is due to gravity.
Answer:
gravity
Explanation:
What were some of newton mathematical and scientific contributions
Which vector should be negative?
any vector whose magnitude is less than 1
a displacement in the direction North
any vector whose magnitude is greater than 1
the velocity of a falling object
Answer: the velocity of a falling object.
As the object is falling down it is experiencing a velocity that is continuously reducing each second and becomes 0 once it reaches the ground. The graph between velocity and time in this case would be a negative slope.
Thus for a object falling down the velocity considered would be negative owing to the reducing speed.
What is the maximum height achieved if a 0.600 kg mass is thrown straight upward with an initial speed of 75.0 m·sâ1? ignore the effect of air resistance?
A 0.600 kg mass thrown upward with an initial speed of 75.0 m/s will reach a maximum height of approximately 287.76 meters, ignoring the effects of air resistance. This is determined using the physics formula v² = u² + 2gH (a kinematic equation for motion under gravity).
Explanation:This problem can be solved using the physics concept of motion under gravity. The object is thrown with an initial velocity to reach a maximum height where its velocity becomes zero. In order to find out the maximum height (H) achieved, we can use the kinematic equation: v² = u² + 2gH, where 'v' is the final velocity, 'u' is the initial velocity, and 'g' is the acceleration due to gravity.
Given in the problem, u = 75 m/s (upward direction implies positive value), v = 0 m/s (at maximum height, the final velocity is zero), and g = -9.8 m²/s (downward direction implies negative value).
By substituting these values into the equation, we get 0 = (75 m/s)² + 2(-9.8 m²/s)(H), which yields H = (75 m/s)² / 2(9.8 m²/s) or approximately 287.76 meters.
This means that, ignoring air resistance, an object with a mass of 0.600 kg thrown upward with an initial speed of 75.0 m/s will reach a maximum height of approximately 287.76 meters.
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Match the following vocabulary words with their definitions.
1. the decay of organic matter caused by microorganisms putrefaction
2. susceptible to decomposition by living organisms. refuse
3. waste biodegradable
Answer: (1) Putrefaction
(2) Biodegradable
(3) Refuse.
Putrefaction refers to decomposition of organic substances usually dead plants' and animals' bodies by microorganisms.
Therefore, it matches with first definition that states the decay of organic matter caused by microorganisms.
Biodegradable substances are decomposed by living organisms such as microorganisms.
Therefore, it matches with the second definition that states susceptible to decomposition by living organisms.
Refuse refers to something which is no longer useful.
Therefore, it matches with the third definition of waste.
Final answer:
The vocabulary words 'putrefaction', 'biodegradable', and 'refuse' are matched with their definitions related to decomposition and waste, with putrefaction being the decay of organic matter by microorganisms, biodegradable indicating that a substance can decompose by living organisms, and refuse meaning waste.
Explanation:
When matching the vocabulary words with their definitions, we relate terms to their respective meanings concerning the breakdown of organic material and waste management. Here are the correct matches:
Putrefaction is the decay of organic matter caused by microorganisms.Biodegradable refers to substances that are susceptible to decomposition by living organisms, such as decomposers.Refuse is synonymous with waste, which refers to materials that are discarded or rejected.Decomposers, like bacteria and fungi, are vital because they break down dead organisms and wastes, transforming complex organic materials into simpler inorganic nutrients that can be reused by producers in the ecosystem. If a substance can be broken down by decomposers, it is termed biodegradable. Organic matter undergoes putrefaction as a result of microbial action, highlighting the role of decomposers in the natural recycling process.
The kind of hazardous waste disposal that most closely resembles recycling is _____.
I believe your answer is Waste Exchange
Charlie throws a ball up into the air. While the ball is airborne, which is the greatest force acting on the ball to slow it down? A. applied force B. friction force C. gravitational force D. normal force
Answer:
it is gravitational force
Explanation:
i did the test is the pretest of force and motion trust me its right
In a hydraulic jack, the pipe below the load has an area of 5 m2, and the pipe through which the input force transmits has an area of 0.1 m2. If the input force is 200 N, what is the output force in kN?
A. 10 kN
B. 20 kN
C. 15 kN
D. 13 kN
As per Pascal's law
Pressure must be equally transmitted to all points of fluids
So here we can say
[tex]P_{in} = P_{out}[/tex]
As we know that pressure is the ratio of force and area so we can say
[tex]\frac{F_{in}}{A_{in}} = \frac{F_{out}}{A_{out}}[/tex]
Given that
[tex]F_{in} = 200 N[/tex]
[tex]A_{in} = 0.1 m^2[/tex]
[tex]A_{out} = 5 m^2[/tex]
[tex]\frac{200}{0.1} = \frac{F_{out}}{5}[/tex]
[tex]F_{out} = 5 * 2000 = 10000[/tex]
so output force will be 10 kN
so A option is correct
Answer:
The answer is A 10 kN
Explanation:
I got it right on the test.
What parts of clam are likely to be preserved?
PLEASE HELP ASAP!!! CORRECT ANSWER ONLY PLEASE!!!
Mr. Harden's class decides to perform an experiment to determine how long it takes different objects to hit the floor when dropped from a desk. The class dropped three balls from a desk, one weighing 2 pounds, one weighing 4 pounds, and one weighing six pounds. It took them all the same amount of time to hit the floor. After evaluating these results, you predict that a 10 pound ball will take
A) more time to hit the floor.
B) less time to hit the floor.
C) about the same amount of time to hit the floor.
D) an unknown amount of time before hitting the floor.
Mark creates a graphic organizer to review his notes about electrical force.
Which labels belong in the regions marked X and Y?
A) X: Decreasing to half will quadruple force
Y: Doubling will double force
B) X: Doubling will cut force in half
C) X: Doubling will double force
Y: Decreasing to half will quadruple force
D) X: Decreasing to half will double force
Y: Doubling will cut force in half
A) X: Decreasing to half will quadruple force
Y: Doubling will double force
The regions marked X and Y will be given as
X: Decreasing to half will quadruple the force
Y: Doubling will double force
What is electrical force?The electric force between charged bodies at rest is conventionally called electrostatic force or Coulomb force. Although the law was known earlier, it was first published in 1785 by French physicist Charles-Augustin de Coulomb, hence the name.
Coulomb's law was essential to the development of the theory of electromagnetism, maybe even its starting point,[1] as it made it possible to discuss the quantity of electric charge in a meaningful way.
The law states that the magnitude of the electrostatic force of attraction or repulsion between two point charges is directly proportional to the product of the magnitudes of charges and inversely proportional to the square of the distance between them.
[tex]F=\dfrac{kq_1q_2}{r^2}[/tex]
Hence the regions marked X and Y will be given as
X: Decreasing to half will quadruple the force
Y: Doubling will double force
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Whats the formula for distance if i have time, acceleration and speed
If time (t), acceleration(a) and initial velocity (Vi) is given distance can be find by
S = (Vi)t + (1/2) at²
If both velocities initial velocity an final velocity is given then formula will be
2aS = (Vf)²- (Vi²)
Where S is the distance.
An electric force exists between which pair of objects? Check all that apply.
A) a neutral object and a negative object
two negative objects
B) a neutral object and a positive object
C) two positive objects
D) a negative object and a positive object
E) two neutral objects
An electric force exists between the following:
-Two negative objects
-Two positive objects
-A negative object and a positive object
Electric forces exist between charged objects. Therefore, two negative objects, two positive objects, and a positive and a negative object all experience electric force. However, under certain conditions, a neutral object and a charged object may also experience electric force.
Explanation:An electric force exists between objects with charge. So, the correct pairs from your options that will experience electric force are: two negative objects (since like charges repel), two positive objects (as these also repel each other) and a negative object and a positive object (because opposite charges attract each other).
A neutral object and a positive object, as well as a neutral object and a negative object, may also experience electric force due to induced charges under certain conditions. However, two neutral objects will not experience electric force as they do not have charge.
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What is the speed of a truck that travels 10 i’m in 10 minutes ?
10km/10min is a legitimate speed. So is meters/sec, km/hour (kph), etc.
Kph is very common for vehicles:
10 km/10 min (60 min/hr) = 60 kph
If you toss a coin straight upward in train that gains speed while the coin is in the air, the coin will land?
The coin tossed straight upward on a train that is accelerating will land back in your hand, retaining its initial horizontal velocity and moving forward with the train due to Newton's first law of motion and the principle of relative motion.
If you toss a coin straight upward on a train that gains speed while the coin is in the air, the coin will still land back in your hand, provided there is no significant air resistance inside the train and you do not move from your spot. This is because when the coin is tossed, it already has the horizontal velocity of the train. As per Newton's first law of motion, objects in motion stay in motion with the same velocity unless acted upon by an unbalanced force.
Therefore, even though the train is accelerating, the coin retains its initial horizontal velocity and moves forward with the train.
An important concept to take note of here is the principle of relative motion. To an observer inside the train, the coin appears to move straight up and down because both the observer and the coin are sharing the same initial horizontal velocity due to the motion of the train. To an observer outside the train, the coin would appear to be following a projectile motion pathway, because they can see both the vertical and the accelerated horizontal motion of the coin. However, since the internal movement of the coin and the observer are both relative to the moving train, the coin will land back in the hand from which it was tossed, assuming the hand remains in the same position relative to the train.
In the film, 2001: A Space Odyssey, astronauts travel through space and experience artificial gravity created by a spinning, cylindrical space station. In order to generate the same gravitational acceleration felt on Earth's surface, a space station rotates so that an astronaut standing inside its outer rim moves tangentially at 30.9 m/s. What is the diameter of the space station?
Artificial gravity is created by rotating the cylinder
So here we can say that the acceleration is due to centripetal acceleration
So here we know that the formula of centripetal acceleration is given by
[tex]a_c = \frac{v^2}{R}[/tex]
so here we know that
[tex]a_c = 9.8 m/s^2[/tex]
[tex]v = 30.9 m/s[/tex]
now we will plug in all values
[tex]9.8 = \frac{30.9^2}{R}[/tex]
[tex]R = \frac{30.9^2}{9.8}[/tex]
[tex]R = 97.43 m[/tex]
So above is the radius of the cylinder
Now to find the diameter
[tex]d = 2R[/tex]
[tex]d = 2*97.43[/tex]
[tex]d = 194.8 m[/tex]
so its diameter is 194.8 m
In order to generate the same gravitational acceleration felt on Earth's surface, the diameter of a spinning, cylindrical space station, around which an astronaut standing inside its outer rim moves tangentially at 30.9 m/s, should be approximately 194.36 meters.
Explanation:The problem in question concerns the concept of artificial gravity and circular motion in physics. To answer this question, we would use the formula for the centripetal acceleration in circular motion, which is a = v² / r, where v = velocity (30.9 m/s) and r = radius of the circle (the part we are trying to find). We equate this to g, the acceleration due to gravity on earth, which is 9.81 m/s². This gives us the equation 9.81 m/s² = (30.9 m/s)² / r. Solving for r gives us r = (30.9 m/s)² / 9.81 m/s² = 97.18 m. This is the radius. But we need the diameter of the space station, so we multiply the radius by 2, giving us a diameter of approximately 194.36 meters.
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The part of an atom that is most empty space is the ?
How will the behavior of the gases in the piston chamber change if heat is applied to the system? Assume the piston moves to keep the pressure constant. A) The gas particles will speed up. B) More gas particles will be produced. C) Fewer gas particles will be produced. D) The kinetic energy will decrease.
Answer: A) The gas particles will speed up.
Explanation: When heat is supplied to the system, the kinetic energy of the molecules increase and thus they start moving randomly and thus the gas molecules will speed up.
Charles law states that volume is directly proportional to the temperature of the gas at constant pressure and number of moles.
[tex]V\propto T[/tex] (At constant pressure and number of moles)
As we know kinetic energy is directly related to temperature, thus as temperature is increased, the kinetic energy of the molecules also increase.
[tex]K.E=\frac{3}{2}RT[/tex]
R = gas constant
T= temperature
generally you must stir a can of paint before you use it.. is paint miscible or immiscible? explain
Paint is immiscible because the layer that forms on top of settled paint is a substance which cannot dissolve with the rest of the paint. Stirring the paint is only temporarily in effort to form an even and thoroughly mixed solution by physically mixing the separate molecules of the solution. However, for it to be miscible, it the solution has to be evenly distributed (chemically) on a molecular level as to not separate when left for a lengthy period of time.
A museum curator moves artifacts into place on many different display surfaces. Consider the following table giving approximate values for coefficients of friction: – schomer – (HHSPhy4F18) 1 Materials μs μk steel on steel 0.74 0.57 aluminum on steel 0.61 0.47 rubber on dry concrete 1.0 0.8 rubber on wet concrete – 0.5 wood on wood 0.4 0.2 glass on glass 0.9 0.4 waxed wood on wet snow 0.14 0.1 waxed wood on dry snow – 0.04 metal on metal (lubricated) 0.15 0.06 ice on ice 0.1 0.03 Teflon on Teflon 0.04 0.04 synovial joints in humans 0.01 0.003 What is Fs,max for moving a 167 kg alu- minum sculpture across a horizontal steel platform? The acceleration of gravity is 9.81 m/s2 . Answer in units of N.
you must give a force for just moving
Fmax=151*0,61*9,81= 904 N <--------------
and
F=151*0.47*9.81= 646 N ... to keep in motion
hope this helps :)
To calculate the maximum static friction (Fs,max) that can be experienced by the 167 kg aluminum sculpture on a steel surface, we first find the normal force by multiplying its mass with acceleration due to gravity. Using the coefficient of static friction for aluminum on steel, we can then calculate Fs,max.
Explanation:The maximum static friction (Fs,max) that can be experienced by the 167 kg aluminum sculpture on a steel surface can be calculated using the formula of friction. Friction's direction is always opposite of the motion and it is usually dependent on the materials in contact and the normal force. The normal force (N) in this case would be equal to the weight of the sculpture which can be calculated by multiplying its mass (m) with the acceleration due to gravity (g). That is, N = mg = (167 kg)(9.81 m/s²).
Once the normal force is known, the next step is to find the maximum static friction (Fs,max) using the equation: Fs,max = μsN. The coefficient of static friction (μs) between aluminum and steel is given as 0.61 from the provided data. Hence, we can substitute the values in the formula to find the desired value.
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Cardiovascular Activities all have what 4 characteristics
fast moving and long intervals , light but quick movements, usually with light weight
Cardiovascular activities are characterized by significant cardiac output, compliance, volume of the blood, and viscosity of the blood. These activities affect how much blood the heart pumps, and can contribute to overall heart health.
Explanation:Cardiovascular activities are characterized by four primary attributes. First, they involve a significant Cardiac Output, which is the volume of blood the heart pumps per minute. Second, they incorporate varying levels of Compliance, referring to the ability of a vessel to stretch and increase its volume with increasing transmural pressure. The third characteristic is the Volume of the Blood in the body, meaning that cardiovascular activities affect how much blood the heart pumps with each beat. The final characteristic is the Viscosity of the Blood, which refers to the thickness and stickiness of the blood, a factor that can impact blood flow and pressure. Participating in regular cardiovascular activities can help maintain and improve these factors, contributing to overall heart health.
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Which government agency is responsible for protecting the nation’s transportation systems to ensure freedom of movement for passengers and commerce? A. Environmental Protection Agency B. Federal Communications Commission C. Occupational Safety and Health Administration D. Transportation Security Administration
economics high school level.
The correct answer is D. Transportation Security Administration.
-Willow I know U might not bealive me but I am Correct.
And here Is my Proof. They are an agency that organizes numerous things that are related to transportation security. Among other things, they regulate things such as quality of roads or railroads, or they participate in establishing safety standards for various types of vehicles, from cars to boats and airplanes and trucks, and they do various other things.
Answer:
D.
Explanation:
Which vector should be negative?
Question 1 options:
any vector whose magnitude is less than 1
a displacement in the direction North
the velocity of a falling object
any vector whose magnitude is greater than 1
Answer:
The velocity of a falling object
Explanation:
The positive X axis is towards right and positive Y axis is towards up, so North direction is positive
A vector with less than 1 magnitude is not negative, because its magnitude may be in between 0 and 1 which is positive vector.
Any vector whose magnitude is greater than 1 is never be a negative vector.
The velocity of a falling object is towards bottom, that is towards negative Y axis. So that vector is negative.
what are chemical properties
Answer:
It is a characteristic of matter that describes its ability to change into a different substance.
Explanation:
Does radiation require a heated liquid to transfer energy?
well yes because it will rquerid to have heat
Answer:
Explanation: its false
Soils refers to natural material from the earth, but not artificial material (like AstroTurf or asphalt). True False
Answer:
It is true that Soil refers to natural material from the earth, but not artificial material (like AstroTurf or asphalt).
Artificial materials are the materials that are made by human like AstroTurf or asphalt while Soil is one of the natural materials giving to us by God. Soil is a material composed of five ingredients which are minerals, soil organic matter, living organisms, gas, and water.