The change in the internal energy of a system is equal to the difference in energy transferred to or from the system as heat and work done.
What is work done?Work done is the energy needed or supplied to perform any task.
The first law of thermodynamics gives the relation between the heat and work done.
The heat added to a system is divide into two. One portion adds up heat to increase the internal energy and the left heat is used to do work.
ΔQ = ΔU + W
ΔU = ΔQ -W
Thus, the first law of thermodynamics states that the change in the internal energy of a system is equal to the difference in energy transferred to or from the system as heat and work done.
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Use the drop-down menus to complete the sentences.
Superconductivity is the ability of certain substances to conduct electricity with no resistance at very ✅cold temperatures.
In a superconductor below its critical temperature, there is ✅no resistance.
As electrons move through the space between the rows of the lattice crystal, it ✅pulls inward on the atoms of the lattice.
The two electrons form a ✅weak attraction and travel together as a Cooper pair.
Therefore, they encounter ✅less resistance overall.
American space pilots were called astronauts. What were soviet space pilots called?.
Answer:
Cosmonauts
Explanation:
As the americans are called astronauts which means star sailors and the russians (soviet space pilots) are called cosmonauts which means sailors of the universe
what can you say about the motion of an object if its speed time graph is a straight line parallel to the time axis ? Also draw a diagram and plese do it on paper , in above picture Q 2 is an example you can do Q3 according to Q2
Answer:
It says about the motion and the graph of the object is stationary, basically travelling at the same speed at any time of the graph. It will never change.
Explanation:
To draw a diagram:
1. Draw an object and represent the speed as stationary and constant at any time.
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A crash test facility is colliding a car with a brick wall. The car has a mass of 1900kg and is traveling at a speed of 30m/s. Using F=ma what force does the car and wall collide with.
A.) 57,000J
B.) 19,000J
C.) 25J
D.) 340J
The force does the car and wall collide will be 57,000 J. Option A is correct.
What is force?Force is defined as the push or pull applied to the body. Sometimes it is used to change the shape, size, and direction of the body. Force is defined as the product of mass and acceleration. Its unit is Newton.
The given data in the problem;
Mass (m)= 1900 kg
Velocity(V)=30m/s
From the Newtons second law of motion;
I = Δ P
F Δ t = m(v-u)
If the time of the collision is too short, can be neglected;
F = 1900(30-0)
F = 57,000 J
Hence, the force does the car and wall collide will be 57,000 J.
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What is the magnitude of the force on a 0. 0150 kg particle placed at p? slader
The magnitude of the force on a 0. 0150 kg particle placed at p will be -8 N. Force is defined as the product of mass and acceleration. Its unit is Newton.
What is force?Force is defined as the push or pull applied to the body. Sometimes it is used to change the shape, size, and direction of the body.
The velocity is found as;
[tex]\rm v= \frac{dx}{dt}\\\ v= \frac{d}{dt} (13.00+2.00t+4.00 t^2-3.00t^3)\\\\ v= 2+ 8t -9t^2[/tex]
The acceleration is found as;
[tex]\rm a = \frac{dv}{dt} \\\\ a= \frac{d}{dt} (2-8t-9t^2)\\\\ a = \frac{d}{dt} 98t-9t^2)\\\\\ a=8-18t\\\\ a=8-(18 \times 3.4)\\\\a=-53.2 m/sec^2[/tex]
The value of the force for the given mass is;
[tex]\rm F= maas \times acceleration \\\\ F = m\times a\\\\ F= 0.150 \times (-53.2) \\\\ F= -7.98 \ N\\\\ F= -8\ N[/tex]
Hence, the value of the force is -8 N .
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What happened to the balloon when it was placed on the bottle with the baking soda and vinegar and why.
Answer:
The ballon would be inflated. The reason is that the sodium bicarbonate in baking soda reacts with acetic acid in vinegar to produce gas.
Explanation:
The main component of baking soda is sodium bicarbonate, [tex]{\rm Na_{2}CO_{3}}[/tex].
Vinegar is mostly a solution of acetic acid [tex]{\rm CH_{3}COOH}[/tex] in water.
Acids such as acetic acid react with carbonate salts. One of the products of such reactions is carbon dioxide [tex]{\rm CO_{2}}[/tex], a gas.
In this question, when the acetic acid in vinegar reacts with sodium bicarbonate in the baking soda, the following reaction would occur:
[tex]\begin{aligned}& {\rm Na_{2}CO_{3}}\, (aq) + 2\, {\rm CH_{3}COOH}\, (aq) \\ &\to 2\, {\rm CH_{3}COONa}\, (aq) + {\rm CO_{2}}\, (g)\end{aligned}[/tex].
The [tex]{\rm CO_{2}}[/tex] produced would then inflate the ballon placed on the opening of the bottle.
The pressure exerted by oil of density of density 900kg
The pressure exerted by oil of density of density 900kg has to be calculated when the height of liquid column is 12 meter, is 1.06×10⁶ Pa.
What is pressure?Pressure is the force applied perpendicular on the surface of the object per unit its area, where the force is distributed. The formula of pressure can be given as,
[tex]p=\rho \times g \times h[/tex]
Here, [tex]\rho[/tex] is the density of fluid, g is the gravitational acceleration and h is the height.
The pressure exerted by oil of density of density 900kg has to be calculated. The height of liquid column is 12 meter. Put the values in the above formula,
[tex]p=\rho \times g \times h\\p=900 \times 9.81 \times 12\\p=105948\\p\approx1.06\times10^5\rm\; pa[/tex]
Thus, the pressure exerted by oil of density of density 900kg has to be calculated when the height of liquid column is 12 meter, is 1.06×10⁶ Pa.
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A child pulls a wagon a distance of 30 m a long athe floor using a rope that makes 30o with the horizontal, how much work does the rope do on the boat if its tension is 200 N
1. What are the main arguments/points presented in the video about consciousness?
Present your opinion about the arguments. Do you agree with all points? Feel free to offer
you personal reflections about the video,
(Video in picture) 20 points
Analyses of the different situations from time to time provide us with a more valid conclusion about our cognitive and other senses, as these developed and well-nurtured a more frequently by watching the different movies and stuff like videos, which would rather help different people to enhance their abilities to develop more and know more about the different terms related.
While any video that is related to the elaboration and improvement of human behavior can greatly enhance one's ability to know about his or her's ability to think and sense more.
As there are various aspects of consciousness and deal with different situations it makes it more understandable to have even more knowledge about the cognitive and motor abilities of the individuals.
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7. What is the mark and unit of work?
Answer:
See below ~
Explanation:
Defining Work :Work is the energy used in applying a force to displace an object. It is defined as the dot product of force and displacement. Depending on the direction, it is classified as :
Positive workNegative workZero work===============================================================
Units of Work :
By deriving the units of Force and Displacement respectively, we will get:
Work = Newton (N) x meter (m)Work = Newton meter (Nm)Although Nm is the common standard unit for Torque, the standard unit for work is Joules (J).
It has many other units as well, namely :
ergHorsepower (HP)Foot-poundKilo-watt hour (kWh)The unit of work is Joules (J)
Work has general formula
W=Force ×DistanceWhen there is an angle included the formula becomes
W=FdcosØIf a ball is thrown straight upward with a velocity of 9. 98 m/s, what is the velocity of the ball as it passes a treetop 4. 88 m tall?
The velocity of the ball as it passes a treetop 4. 88 m tall and thrown straight upward with a velocity of 9. 98 m/s is 14 m/s.
What is the equation of motion?The equation of motion is the relation between the distance, velocity, acceleration and time of a moving body.
The third equation of the motion for distance can be given as,
[tex]v^2-u^2=2ah[/tex]
Here, is the u initial body, a is the acceleration of the body and h is the height of it.
The ball is thrown straight upward with a velocity of 9. 98 m/s. The height of it is 4. 88 m. Thus, initial velocity is 4.88 meters and the acceleration due to gravity is 9.98 m/s².
Put the values,
[tex]v^2-u^2=2ah\\v^2-(9.98)^2=2(9.98)(4.88)\\v^2=2(9.98)(4.88)+(9.98)^2\\v\approx 14\rm\; m/s[/tex]
Hence, the velocity of the ball as it passes a treetop 4. 88 m tall and thrown straight upward with a velocity of 9. 98 m/s is 14 m/s.
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Nick carries out an experiment in which he swings a rubber bung around his head on a string. Name the force that causes the centripetal force in this experiment
When he swings a rubber bung around his head on a string, the centripetal force is caused by the tension in the string.
What is centripetal force?When an object travels in circular path, a force which makes an object to continue to move in circular motion is the centripetal force which is directed towards the center of the path.
Thus, When he swings a rubber bung around his head on a string, the tension force is developed in the string which is in turn balanced by the centripetal force.
Thus, the centripetal force is caused by the tension in the string.
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Vector Q is 0.321 m long in a
123° direction. Vector Sis
0.876 m long in a -32.1°
direction.
Find the magnitude of their
vector sum.
magnitude (m)
The magnitude of their vector sum will be 0.60025 m. Law of vector addition is used in given problem.
What is a vector?A vector is a quantity or phenomena with magnitude and direction that are independent of one another. The phrase also refers to a quantity's mathematical or geometrical representation.
If no vector can be written as a linear combination of the others, a set of vectors is said to be linearly independent.
Angle between Q and S is found as;
θ=123°+32.1°
θ=155.1°
The magnitude of their vector sum,magnitude (m) is found as;
[tex]\rm R = \sqrt{Q^2+S^2+2QS cos \theta } \\\\ R=\sqrt{(0.34)^2+(0.876)^2+2(0.34)(0.870)cos 155.1^0 } \\\\ R=0.6002522 \ m[/tex]
Hence,the importance of their vector sum will be 0.60025 m.
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Assuming that the smallest measurable wavelength in an experiment is 0. 450 fm , what is the maximum mass of an object traveling at 479 m⋅s−1 for which the de broglie wavelength is observable?
The maximum mass of an object traveling at 479 m⋅s−1 for which the de broglie wavelength is observable, is 3.82×10⁻²⁷ kg.
What is De Broglie equation?To find the wavelength of a wave, Broglie given an equation. This equation for wavelength is,
[tex]\lambda=\dfrac{h}{mv}[/tex]
Here, (h) is the planks constant, m is mass and (v) is the velocity.
Assuming that the smallest measurable wavelength in an experiment is 0. 450 fm. The speed of the object is 479 m⋅s−1.
Put the values in the formula,
[tex]\lambda=\dfrac{h}{mv}\\ 0.450\times10^{-15}=\dfrac{6.63\times10^{-34}}{m\times479}\\m=3.07\times10^{-21}\rm \;kg[/tex]
Thus, the maximum mass of an object traveling at 479 m⋅s−1 for which the de broglie wavelength is observable, is 3.82×10⁻²⁷ kg.
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a net force, the magnitude of which is 2800 n, accelerates a 1250-kg vehicle for 8.0 s. the vehicle travels 80.0 m during
this time. what power output does this represent?
The power output is, 2800 watt. Power is defined as the rate of the work done.
What is force?Force is defined as the push or pull applied to the body. Sometimes it is used to change the shape, size, and direction of the body. Force is defined as the product of mass and acceleration. Its unit is Newton.
The power output is found as;
[tex]\rm P = \frac{W}{t} \\\\ P= \frac{F \times d }{t} \\\\ P= \frac{2800 \ N \times 80.0\ m}{8.0 \ sec} \\\\ P=2800 \ Watt[/tex]
Hence,the power output is, 2800 watt.
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Rank the following ionic compounds by the magnitude of their lattice energy
The order of ionic compounds by the magnitude of their lattice energy in from the highest magnitude to lowest is BeO>MgO>Na₂O>Na₂S>LiCl.
What is lattice energy?The lattice energy is the change of energy of the experimental energy actual energy of the ionic solid. This energy is based on the distance between the ions and the charge of those ions.
The ionic compounds which need to be arranged in order of lattice energy are,
LiCl, MgO, Na2O, BeO, Na2s.
The lattice energy of the given compounds is:
LiCl= 853 kJ/mol,MgO= 3795 kJ/mol,BeO= 4443 kJ/mol,Thus, the order of ionic compounds by the magnitude of their lattice energy in from the highest magnitude to lowest is,
[tex]\rm BeO > MgO > Na_2O > Na_2S > LiCl.[/tex]
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Why is your reflection right side up in the back of a spoon but upside down in the front?
Answer:
Because unlike a flat mirror, the curved surface of the spoon's bowl bounces incoming rays back towards a central focus point lying between your face and the centre of the spoon's. In passing through this point, rays from the upper part of your face are reflected downward, while those from the lower part are reflected upward.
Did that help you?
I need help! Thank you.
Answer:
The answer is the third one.
C.
Hope this helps!
Can you please help me
Answer: Hello Miko here to help!
Explanation: The answer is c!
A 1200 kg car accelerates from 13 m/s to 17 m/s. find the change in momentum of the car.
A light bulb consumes 150 J of electrical energy per second but only emits 15 J of light energy per second. Calculate the efficiency of the bulb.
Answer:
10% efficiency
Explanation:
Formula for efficiency :
⇒ Efficiency (η) = Output energy (E₂) / Input energy (E₁)
===============================================================
Given :
⇒ Input Energy (E₁) = 150 J
⇒ Output Energy (E₂) = 15 J
=============================================================
Solving :
⇒ η = 15/150
⇒ η = 1/10
⇒ η = 10% efficiency
Which early scientist theorized that the planets moved in elliptical orbits, or oval-like paths, around the sun?.
Answer:
Johannes Kelper
Explanation:
THANKYOU_Bts armyAn electron drops from n = 2 to n = 1 in a hydrogen atom.
How much energy in eV is emitted?
How much energy in joules is emitted?
What frequency does this energy correspond to?
What type of EM wave is this?
E=1. 55× 10−19 J.
ultraviolet light
When an electron drops from n = 2 to n = 1, it emits a photon of ultraviolet light. The step from the second energy level to the third is much smaller. It takes only 1.89 eV of energy for this jump. It takes even less energy to jump from the third energy level to the fourth, and even less from the fourth to the fifth.
The benefits of exercise include which of the following?
makes your heart weak
makes your body strong
helps you sleep better
helps you feel good
Answer:
the Answer To the question is b&c
4. Runaway truck ramps are common on mountainous highways in case the brakes fail on large trucks. if a runaway 60,000 kg truck is moving at 27 m/s, how much work must be done to stop the truck? 5. th the net force applied by the truck ramp in the previous question is -300,000 N, how far along the ramp will the truck move as it stops?
Answer:
10000000000000000000000000000000000
Explanation:
What resistance would produce a current of 200 amperes with a potential difference of 2000 volts
Answer:
10 OhmExplanation:
According to ohm's law, we know that:
V = IRWhere,
Voltage (V) = 2000 VoltsCurrent (I) = 200 AmperesSubstituting the values, we get:
→ 2000 = 200 × R
→ 2000/200 = R
→ 10 = R
Hence,
Required Resistance = 10 ohm100 Points need ASAP
Determine the mass of fuel required for the expected energy consumption in the United States for the next 10 years.
Energy use per person per year in the United States = 3.5 × 1011 joules.
Base your calculations on a current population of 310,000,000.
Answer:
what he said
Explanation:
i got it right
A restaurant records the number of tables served each night, and the results have the values: minimum = 3, lower quartile = 14, median = 23, upper quartile = 29, and maximum = 40. Which box plot represents the data?
To choose the correct box plot, verify each of the options and make sure all the values in the plot match the values provided.
How to identify the median?In a box plot, this value is represented by a vertical line located in the middle of the graph.
How to identify the maximum and the minimum?The maximum is the value located on the farthest right, while the minimum is located on the farthest left.
How to identify the quartiles?Divide the graph into 4 and analyze how much each quartile represents.
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Answer:
To choose the correct box plot, verify each of the options and make sure all the values in the plot match the values provided.
Explanation:
A 5. 0 kg cylinder of solid iron is supported by a string while submerged in water. What is the tension in the string? the density of iron is 7860 kg/m3 and that of water is 1000 kg/m3
The tension in the string which supports the 5.0 kg cylinder of solid iron and submerged in water is 42.8 N.
What is tension in the string due to hanging weight?
Tension is the pulling force carried by the flexible mediums like ropes, cables and string. Tension in a body due to the weight of the hanging body is the net force acting on the body.
A 5. 0 kg cylinder of solid iron is supported by a string while submerged in water. The density of iron is 7860 kg/m3 and that of water is 1000 kg/m3.
The tension in string can be find out using the following formula,
[tex]T=mg\left(1-\dfrac{\rho_w}{\rho_i}\right)[/tex]
Here, m is the mass of solid, g is gravitational force, ρ is the density and subscript (w and i) is for water and iron respectively.
Put the values,
[tex]T=5\times9.81\left(1-\dfrac{1000}{7860}\right)\\T=42.8\rm\; N[/tex]
Thus, the tension in the string which supports the 5.0 kg cylinder of solid iron and submerged in water is 42.8 N.
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Ultraviolet light from a distant star is traveling at 3.0 × 108 m/s. how long will it take for the light to reach earth if it must travel 4.0 × 1013 km? 2.7 × 10–2 hours 2.2 × 103 hours 3.7 × 104 hours 1.3 × 105 hours
Given speed and the distance that must be covered, the time it will take the ultraviolet light to reach the earth is 3.7 × 10⁴ hours.
What is Speed?Speed is simply referred to as distance traveled per unit time.
Mathematically, Speed = Distance ÷ time.
Given the data in the question;
Speed of the Ultraviolet light c = 3.0 × 10⁸m/s = 1.08 × 10⁹km/hDistance it must cover d = 4.0 × 10¹³kmTime elapsed t = ?We substitute our given values into the expression above.
Speed = Distance ÷ time
1.08 × 10⁹km/h = 4.0 × 10¹³km ÷ t
t = 4.0 × 10¹³km ÷ 1.08 × 10⁹km/h
t = 3.7 × 10⁴ hrs
Therefore, given speed and the distance that must be covered, the time it will take the ultraviolet light to reach the earth is 3.7 × 10⁴ hours.
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