When 3. 0 kg of water is cooled from 80. 0°C to 10. 0°C, how much heat energy is lost?
Answers
When 3.0 kg of water is cooled from 80.0°C to 10.0°C, a certain amount of heat energy is lost. This loss of heat energy is due to the water releasing energy to the surrounding environment as it cools down. To calculate the amount of heat energy lost, we can use the specific heat capacity of water and the formula Q=mcΔT.
The specific heat capacity of water is 4.184 J/g°C, which means it takes 4.184 Joules of energy to raise the temperature of 1 gram of water by 1 degree Celsius. The mass of the water in this scenario is 3.0 kg, which is equal to 3000 grams. The change in temperature is 80.0°C - 10.0°C = 70.0°C, which is represented by ΔT.
Using the formula Q=mcΔT, we can calculate the heat energy lost by the water:
Q = (3000g)(4.184 J/g°C)(70.0°C)
Q = 879,360 J
Therefore, when 3.0 kg of water is cooled from 80.0°C to 10.0°C, it loses 879,360 Joules of heat energy. This energy is released to the surrounding environment, causing a decrease in the temperature of the water. It is important to note that the specific heat capacity of water is relatively high, which means it takes a lot of energy to heat or cool water compared to other substances.
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Related Questions
if the input force on a wheel and axle is 2 N and the output force is 20N what is its mechanical advantage
Answers
Mechanical Advantage is always (Output Force) / (Input Force) .
MA = (20 N) / (2 N)
MA = 10
which statements correctly compare the gravitational force with the electrical force? check all that apply.
Answers
The correct statements that compare gravitational force with electrical force are 1, 2, and 5.
Both gravitational and electrical forces are fundamental forces of nature, but while the electrical force can be either attractive or repulsive and can be positive or negative, the gravitational force is always attractive and is only positive. The electrical force is stronger than the gravitational force, but the strength of the gravitational force is directly proportional to the product of the masses of the objects while the strength of the electrical force is directly proportional to the product of the charges of the objects. These differences are essential in understanding the behavior of the two types of forces in different situations.
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--The complete question is, Which statements correctly compare the gravitational force with the electrical force? check all that apply.
1. Both forces are fundamental forces of nature.
2. The strength of the electrical force can be either positive or negative, while the gravitational force is always attractive.
3. The electrical force is stronger than the gravitational force.
4. The electrical force can be either attractive or repulsive, while the gravitational force is always attractive.
5. The strength of the gravitational force is directly proportional to the product of the masses of the objects, while the strength of the electrical force is directly proportional to the product of the charges of the objects.--
Which statements are true for an electron moving in the direction of an electric field and why? (There may be more than one correct choice.)
(a) Its electric potential energy increases as it goes from high to low potential.
(b) Its electric potential energy decreases as it goes from high to low potential.
(c) Its potential energy increases as its kinetic energy decreases.
(d) Its kinetic energy decreases as it moves in the direction of the electric field.
(e) Its kinetic energy increases as it moves in the direction of the electric field.
Answers
The correct statements of an electric field are: (a) Its electric potential energy increases as it goes from high to low potential. (d) Its kinetic energy decreases as it moves in the direction of the electric field.
(a) When an electron moves from a region of high electric potential to a region of low electric potential, its electric potential energy increases. This is because the electron experiences a change in potential energy due to the electric field. Moving in the direction of the electric field, the electron gains potential energy. (d) As the electron moves in the direction of the electric field, its kinetic energy decreases. This is because the electric field does work on the electron, converting its kinetic energy into potential energy. The electron loses kinetic energy as it accelerates in the direction of the field. (c) and (e) are incorrect statements. The potential energy and kinetic energy of the electron are not directly related in this context. While the electron's potential energy may change, its kinetic energy does not necessarily follow a predictable pattern solely based on the direction of the electric field.
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a nitrogen cold-gas thruster on a satellite has a chamber pressure and temperature of 10 bar and 300 k and operates in a vacuum. the converging nozzle has a throat diameter of 1 mm. determine:
Answers
To determine the specific information requested, we will use the properties of the nitrogen gas, the given chamber pressure and temperature, and the throat diameter of the converging nozzle.
1. To find the mass flow rate through the nozzle, we can use the equation:
mass flow rate = pressure * throat area * discharge coefficient / square root of (specific gas constant * temperature)
However, we need the discharge coefficient for the nozzle. Without it, we cannot calculate the exact mass flow rate.
2. To find the velocity at the throat of the nozzle, we can use the equation:
velocity = square root of (2 * specific heat ratio * specific gas constant * temperature)
The specific heat ratio for nitrogen gas is typically around 1.4.
3. To find the exit velocity of the nitrogen gas, we can use the equation:
exit velocity = velocity * square root of (specific heat ratio * temperature ratio)
The temperature ratio can be found using the equation:
temperature ratio = (chamber pressure / exit pressure) raised to the power of (1 - (1 / specific heat ratio))
In this case, the satellite operates in a vacuum, so the exit pressure is effectively zero.
Therefore, the temperature ratio simplifies to:
temperature ratio = (chamber pressure) raised to the power of (1 - (1 / specific heat ratio))
4. To find the thrust produced by the nitrogen gas, we can use the equation:
thrust = mass flow rate * exit velocity + (exit pressure - ambient pressure) * exit area
Since the satellite operates in a vacuum, the ambient pressure can be considered negligible.
However, since the discharge coefficient for the nozzle is not provided, we cannot calculate the exact mass flow rate and, subsequently, the thrust produced by the nitrogen cold-gas thruster.
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A force of 1000N acts to stop a 1000kg car moving at 20m/s. How much time does it take the car to stop?
Answers
Answer:
Explanation:
How much force does a 1000kg car need to accelerate at 3m s2 to the south?
Answer- the force needed to accelerate the 1000kg car by 3m/s2 is 3000N.
67.0mi/hr to m/s
please show work
Answers
wo linear waves have the same amplitude and speed, and otherwise are identical, except one has half the wavelength of the other. which transmits more energy? by what factor?
Answers
The longer wavelength wave transmits more energy than the shorter wavelength wave, by a factor of four. This is because wave energy is proportional to the square of the amplitude and the wavelength.
When two linear waves have the same amplitude and speed, but different wavelengths, the longer wavelength wave transmits more energy than the shorter wavelength wave. This is because wave energy is proportional to the square of the amplitude and the wavelength. Specifically, the energy carried by a wave is proportional to the amplitude squared, and to the wavelength. Thus, a wave with twice the wavelength of another wave will carry four times the energy, since the wavelength is squared. This relationship between wavelength and energy can be observed in a number of wave phenomena, including ocean waves, sound waves, and electromagnetic waves.
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Nikolas had an idea that he could use the compressed carbon dioxide in a fire extinguisher to propel him on his skateboard.
Nikolas, the fire extinguisher, and the skateboard have a combined mass of 50 kg. What force would the fire extinguisher have to produce to propel Nikolas if he wanted to accelerate at a rate of 1.2 m/s2? Round your answer to the nearest whole newton.
60 N
Which of Newton’s laws did Nikolas have to use to calculate this force?
Answers
Answer:
I'm terrible at explaining so here's a screenshot, please do not listen to the other answer, it is wrong.
- Ripper
Explanation:
Answer:
C is the correct answer !!!
Explanation:
Which waves move fast Longitudinal waves or Transverse waves and why???
Answers
Answer:
Transverse wave
Explanation:
Its because in transverse wave the particle displacement is perpendicular to the direction of wave propagation..hope it helps you...
Help with this question plz
Answers
Answer:
it would be 24 miles
Explanation:
6x4 to get your answer because he is going four different ways north,west,south,and east
an object of 5kg is moving with a velocity of 2 m/s an externally applied force increases the velocity of an object to 6 m/s. Calculate the change in momentum
Answers
The change in momentum of an object that is initially moving at a velocity of 2m/s but later increased to 6m/s is 20kgm/s.
How to calculate change in momentum?The momentum of a body can be calculated by multiplying the mass of the body by its velocity.
However, the change in momentum is the mass of the body multiplied by the change in velocity as follows:
∆p = m × [Vf - Vi]
Where;
m = massVf = final velocityVi = initial velocity∆p = 5 × (6 - 2)
∆p = 20kgm/s
Therefore, the change in momentum of an object that is initially moving at a velocity of 2m/s but later increased to 6m/s is 20kgm/s.
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consider a wave passing through a single slit. what happens to the width of the central maximum of its diffraction pattern as the slit is made half as wide? it becomes one-fourth as wide. it becomes one-half as wide. its width does not change. it becomes twice as wide. it becomes four times as wide.
Answers
Wave passing through a single slit it becomes twice as width of the central maximum of its diffraction pattern as the slit is made half as wide.
The central maximum lies between the first-order minima defined by the relation sinθ dark =mλ/a=λ/a. Because the angle is small, sinθ dark ≈tanθ dark =y dark/L, so the width of the central maximum is proportional to Lλ/a. Thus, the central maximum becomes twice as wide if the slit width a becomes half as wide.
In order to enter the region of geometric shadow cast by the obstruction or aperture, waves must interact with one another or bend around its edges, which is referred to as diffraction. A secondary source of the wave that is propagating is in fact created by the diffracting item or aperture. The term "diffraction" was originally used in 1660 by the Italian scientist Francesco Maria Grimaldi, who was also the first to make precise observations of the phenomena.
On the registration plate, an infinite number of spots (three are illustrated) along length d project phase contributions from the wave front, resulting in a constantly changing intensity.
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T or F: A spacecraft has captured and brought material to earth from a comet
Answers
A spacecraft has captured and brought material to earth from a comet is True.
A spacecraft has indeed captured and brought material to Earth from a comet. One notable example is the NASA mission called Stardust, which launched in 1999. In 2004, Stardust encountered the comet Wild 2, collected samples of its coma (the cloud of gas and dust surrounding the nucleus), and then returned to Earth in 2006.
The spacecraft captured tiny particles of dust and organic material from the comet, providing valuable insights into the composition and origins of comets. This mission demonstrated the ability of spacecraft to retrieve and deliver extraterrestrial material to Earth for scientific analysis.
Hence, A spacecraft has captured and brought material to earth from a comet is True.
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a pair of electrons would have _________ when they are close together than when they are far apart.
Answers
A pair of electrons would have a lower energy when they are close together than when they are far apart.
How does energy of electron change?The energy of an electron can change in various ways, including:
Absorption of photons: An electron can absorb a photon of light and transition to a higher energy level.
Collisions with other particles: An electron can collide with another particle and gain or lose energy.
Electric or magnetic fields: An electron can experience a change in energy when it moves through an electric or magnetic field.
Changes in the potential energy: The potential energy of an electron can change as it moves closer to or farther away from the nucleus of an atom.
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today we rely largely on what technique to precisely measure distances in the solar system?
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Today, we rely largely on the technique of radar ranging to precisely measure distances in the solar system.
Radar ranging involves sending out a radar signal from Earth to a nearby planet or moon, and then measuring the time it takes for the signal to bounce back to Earth.
By knowing the speed of light, we can use this time measurement to calculate the distance to the object.
This technique is particularly useful for measuring distances to objects that are too far away to be measured using other methods, such as parallax. Radar ranging has been used to accurately measure the distances to planets, moons, asteroids, and even some nearby stars.
It has revolutionized our understanding of the solar system and has enabled us to explore it in greater detail.
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increasing the diameter of a telescope i. increases its light gathering power. ii. increases its resolving power. iii. increases it magnifying power. iv. increases its chromatic aberration.
Answers
Yes, a telescope's diameter can be increased to achieve all of these results.
The telescope can gather more light by expanding its diameter, which makes it simpler to observe faint objects. The telescope's resolving power is also improved by the larger diameter, which enables it to resolve minute details with greater accuracy. The telescope can create images with higher levels of magnification with more light and better resolving power. As a result of different light wavelengths being focused at different spots, chromatic aberration—which is another effect of greater diameter—can also rise.
An optical device called a telescope is used to magnify distant objects, enabling us to view distant galaxies, planets, stars, and other astronomical objects. In order to gather light and create an image, telescopes come in a wide variety of sizes and designs and employ a variety of lenses and mirrors. Terrestrial items like birds and trees can also be seen through telescopes. Astronomers and researchers utilise telescopes, as do amateur astronomers who seek to study the night sky.
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Which statement best defines an electric field?
A. force per unit charge on a negative source charge
B. force per unit charge on a negative test charge
C. force per unit charge on a positive source charge
D. force per unit charge on a positive test charge
Answers
helpp me
An object starts from REST and ends up reaching 3500 J of Kinetic Energy. How much work was done?
Answers
Timmy likes purple, what's his favorite color?
Answers
Answer: Most likely purple
Explanation:
Answer:
Purple?
Explanation:
I'm confused what you are asking.
The extension of an elastic object is __________ proportional to the force applied, as long as the limit of proportionality is not exceeded. What word completes the sentence?
Answers
Answer:
Directly
Explanation:
The extension of the elastic object is directly proportional to the force applied.
I hope this is the answer you are looking for and I hope this helps!
Which element most likely interacts with water the same way lithium interacts with water?
Answers
Answer:
Is there a multiple choice or select all that apply? I would say Potassium (K) or Sodium (Na)
Explanation:
A student tries to measure the period of a pendulum that is already swinging
left and right. At the moment when the pendulum is fully to the left, she
counts 'One' and starts a stopwatch. She counts successive swings each time
that the pendulum returns to the left. When she counts ‘Ten' she stops the
stopwatch, and sees that it reads 12.0 s.
a. What was her mistake?
______________________________________________________________
b. What is the period of swing of this pendulum?
______________________________________________________________
c. In this particular experiment, explain the likely effect of her reaction time
on her answer.
Answers
Answer:
a. The student's mistake was that the student did not swing the pendulum and start the watch at the same time.
b. 1.2 s per swing.
c. The likely effect of her reaction time is that they will should subtract two seconds off the time.
Explanation:
The pupil made the error of not simultaneously starting the watch and swinging the pendulum.
What is pendulum?Pendulum is defined as a body that is suspended from a fixed point and moves back and forth while being pulled by gravity. The pendulum is used to gauge the gravitational pull because the force of gravity causes it to swing back toward its average position. A pendulum's time period can be used to tell the time because it is constant.
The swing of the pendulum is 1.2 sec. per swing. They should take two seconds off the timing due to her presumably slow reaction time. A pendulum's total time should be divided by the quantity of oscillations in order to determine its time period. When compared to a pendulum with a shorter string, the one back and forth cycle of a longer-stringed pendulum requires more time to complete.
Thus, the pupil made the error of not simultaneously starting the watch and swinging the pendulum.
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What is the force required to keep the object sliding on a surface with the same speed?
Answers
The amount of force necessary to maintain an object is moving at precisely the same speed—or sliding friction—is measured. The object begins to move after the imparted force. static or sliding friction measurement.
The definition of friction force
Intensity of Friction What Is Frictional Force? Friction is the force that prevents motion when one object's face scrapes against another's surface. The mechanical advantage of a machine is diminished by friction, or even more specifically by a decline in the output to input ratio.
Why is friction an antagonistic force?
Rubbing acts as just a repelling force when one body moves through a surface. Friction is the result of two surfaces interacting with one another. If a layer is not fluid, then objects cannot move through it.
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what has to increase in order for an object to accelerate?
Answers
Answer:
Answer: B. Explanation: For an object to accelerate the force on it must be increased. According to Newton's second law of motion.
Explanation:
I do Accelerate to good luck
A 6-kg plastic tank that has a volume of 0. 18 m3 is filled with liquid water. Assuming the density of water is 1000 kg/m3, determine the weight of the combined system
Answers
The weight of the combined system is 58,800 N.
To determine the weight of the combined system, we need to consider the weight of the plastic tank and the weight of the water it contains.
Step 1: Weight of the Plastic Tank
The weight of an object is given by the equation W = m × g, where W is the weight, m is the mass, and g is the acceleration due to gravity. Since the mass of the plastic tank is 6 kg, and the acceleration due to gravity is approximately 9.8 m/s², we can calculate the weight of the tank as follows:
W_tank = 6 kg × 9.8 m/s² = 58.8 N
Step 2: Weight of the Water
The weight of the water is determined by its mass and the acceleration due to gravity. The density of water is given as 1000 kg/m³, and the volume of the tank is 0.18 m³. We can calculate the mass of the water using the equation m = density * volume:
m_water = 1000 kg/m³ × 0.18 m³ = 180 kg
Now, we can calculate the weight of the water:
W_water = 180 kg × 9.8 m/s² = 1764 N
Step 3: Weight of the Combined System
To find the weight of the combined system, we sum the weights of the tank and the water:
W_combined = W_tank + W_water = 58.8 N + 1764 N = 1822.8 N
Therefore, the weight of the combined system, consisting of the 6-kg plastic tank filled with water, is 1822.8 N.
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A spring oscillating with a frequency of 40/p Hz has a constant K = 640 N/m.
The mass that is tied to the spring is:
a. 1.0
b. 10
c. 100
d. 1.0 X 10 -1
e. Other: which one? ___
Answers
The mass that is tied to the spring whose frequency is 40/p Hz and the spring constant is 640 N/m is 0.4 kg.
The frequency of the spring is expressed in terms of its physical properties, i.e., mass and spring constant. We can use the following equation to solve the problem:
f = 1 / 2π √(K / m), where m is the mass of the spring and K is the spring constant of the spring.
Therefore,
m = K / π2 f2
m = 640 / (π2 × (40/π)2)
m = 640 / (1600)kg
m = 0.4 kg
Therefore, The mass tied to the spring, whose frequency is 40/p Hz and spring constant is 640 N/m is 0.4 kg.
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5). A body of mass 75kg lying on a surface of
μ = 0.4 move in the direction of a horizontal force
of 300N applied to it.
a). Calculate the
i). friction force
ii). acceleration of the body
b). Explain the result in aii).
Answers
Explanation:
a) i) Calculation of the friction force:
The friction force can be determined using the equation:
friction force = coefficient of friction * normal force
The normal force is equal to the weight of the object, which can be calculated as:
normal force = mass * gravitational acceleration
where the gravitational acceleration is approximately 9.8 m/s².
normal force = 75 kg * 9.8 m/s² = 735 N
friction force = 0.4 * 735 N = 294 N
ii) Calculation of the acceleration of the body:
Now, we can calculate the acceleration using Newton's second law:
net force = mass * acceleration
Since the applied force and the friction force act in opposite directions, the net force can be calculated as:
net force = applied force - friction force
net force = 300 N - 294 N = 6 N
mass = 75 kg
6 N = 75 kg * acceleration
acceleration = 6 N / 75 kg = 0.08 m/s²
b) Explanation:
In part (a), we calculated the friction force to be 294 N and the acceleration of the body to be 0.08 m/s². The positive acceleration indicates that the body is moving in the direction of the applied force.
The friction force opposes the motion of the body and acts in the opposite direction to the applied force. In this case, the applied force of 300 N is greater than the friction force of 294 N. As a result, the net force acting on the body is 6 N in the direction of the applied force.
The small net force of 6 N, compared to the body's mass of 75 kg, results in a relatively low acceleration of 0.08 m/s². This indicates that the body will accelerate slowly in the direction of the applied force due to the presence of friction.
Overall, the friction force and the resulting acceleration of the body are determined by the coefficient of friction (μ) and the mass of the object. In this case, the body experiences a relatively high friction force, leading to a small acceleration.
two equally charged particles are held 3.2x10-3 m apart and then released from rest. the initial acceleration of the first particle is observed to be 7.0 m/s2 and that of the second to be 9.0m/s2 . if the mass of the first particle is 6.3 x 10-7 kg, what are (a) the mass of the second particle and (b) the magnitude
Answers
The mass and magnitude of the second particle are calculated below.
The initial velocity of an object is its velocity prior to the effect of acceleration, which causes the change. The velocity will be the final velocity after accelerating the object for some time. When a particle moves at a constant speed, it can be accelerated. When a point object moves in a horizontal circular path at a constant speed, the direction of its velocity vector changes over time. It means that in a uniform circular motion, the object's velocity vector changes over time.
Distance between the charges, r = 3.2 × \(10^{-3}\)m
initial acceleration of first particle, \(a_{1}\) = 7m / \(s^{2}\)
Initial acceleration of second particle, \(a_{2}\) = 9.0m / \(s^{2}\)
Mass of first particle, \(m_{1}\) = 6.3 × \(10^{-7}\)kg
Mas of second particle, m₂ = ?
a) Since, \(F_{1}=F_{2}\)
∴ \(m_{1}a_{1} = m_{2}a_{2}\)
mass of second particle-\(m_{2}\) =\(\frac{m_{1}\times a_{1}}{a_{2}}\)
= \(\frac{6.3\times10^{-7}\times7.0}{9.0}\)
=4.9 × \(10^{-7}\)Kg
b)As, \(F_{1} = F_{2}\)
= \(\frac{q_{1}q_{2}}{4\pi E_{0}r^{2}}\) = \(m_{1}a_{1}\)
= 6.3 × \(10^{-7} \times\) 7.0
= 44.1 × \(10^{-7}\)
∴ q = 7.1 × \(10^{-11}\)C.
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4 Generators are used to convert chemical energy into electrical energy. One company
that designs generators claims that their newest design can convert 1,000 joules of
chemical energy into 1,200 joules of electrical energy. What conclusion can you draw
about this company's design?
A No conclusion can be drawn without more information.
B It has a very good and realistic efficiency.
C It is impossible to convert chemical energy into electrical energy.
D It is impossible to create more energy than was input.
Answers
Answer:
fg
Explanation:
bbjtvnjj
the silvered wall of a vacuum bottle takes care of heat flow by
Radiation
Convection
Conduction
Conduction and convection