The net charge in the system is 0. All electrons that were sent to the rod are missing from the fur. Hence, the rod is a (-) while the fur is a (+).
Answer:
In order to satisfied the law of conservation of charge, If the rubber rod becomes negatively charged, then the fur becomes positively charged.
Explanation:
This law states that charge is neither created nor destroyed, it can only be transferred from one system to another. In this case the rubber rod obtains electrons from the fur, in consequence the rod, which was originally neutral becomes negatively charged (the number of electrons on it increase), and the fur which was originally neutral becomes positively charged (the number of electrons on it decrease).
How do protons, neutrons, and electrons determine the properties of an atom?
(Please explain for someone who doesn't understand this stuff)
Answer:
Number of protons = Number of electrons
Protons = positively charged atoms
Electrons = negatively charged atom
Neutrons = no charge atoms
The number of protons = electrons because the charge can cancel themselves out
Number of electrons = Determines boiling/ melting point
Lots of electrons = High boiling/ melting point
Low number of electrons = low boiling/ melting point
Explanation:
A hydraulic lift is used to jack a 1170 kg car 13 cm off the floor. The diameter of the output piston is 18 cm, and the input force is 250 N.(a) What is the area of the input piston?m2(b) What is the work done in lifting the car 13 cm?J(c) If the input piston moves 13 cm in each stroke, how high does the car move up for each stroke?m(d) How many strokes are required to jack the car up 13 cm? (Include fractions of a stroke in your answer).(e) Calculate the combined work input of all of the strokes.
(a) [tex]5.45\cdot 10^{-4} m^2[/tex]
According to Pascal's principle, the pressure on the first piston is equal to the pressure on the second piston:
[tex]p_1 = p_2\\\frac{F_1}{A_1}=\frac{F_2}{A_2}[/tex] (1)
where
F1 = 250 N is the input force
A1 = ? is the area of the input piston
F2 is the output force
A2 is the area of the output piston
The output force is just the weight of the car:
[tex]F_2 = mg =(1170 kg)(9.8 m/s^2)=11,466 N[/tex]
The radius of the output piston is half the diameter: [tex]r=d/2=18 cm/2 = 9 cm =0.09 m[/tex], so its area is
[tex]A_2 = \pi r^2 = \pi (0.09 m)^2=0.025 m^2[/tex]
So we can solve eq.(1) for A1, the area of the first piston:
[tex]A_1 = A_2 \frac{F_1}{F_2}=(0.025 m^2)\frac{250 N}{11,466 N}=5.45\cdot 10^{-4} m^2[/tex]
(b) 1491 J
The work done in lifting the car 13 cm is equal to the gravitational potential energy gained by the car:
[tex]W=\Delta U=mg \Delta h[/tex]
where:
m = 1170 kg is the mass of the car
g = 9.8 m/s^2
[tex]\Delta h=13 cm=0.13 m[/tex] is the increase in height of the car
Substituting,
[tex]W=\Delta U=(1170 kg)(9.8 m/s^2)(0.13 m)=1491 J[/tex]
(c) 0.0028 m
Assuming the machine is 100% efficient and there is no waste of energy, the input work is equal to the output work:
[tex]W_i = W_o\\F_1 d_1 = F_2 d_2[/tex]
where
F1 = 250 N is the input force
d1 = 13 cm = 0.13 m is the displacement of the input piston
F2 = 11,466 N is the output force (the weight of the car)
d2 is the displacement of the output piston
Solving for d2,
[tex]d_2 =d_1 \frac{F_1}{F_2}=(0.13 m)\frac{250 N}{11466 N}=0.0028 m[/tex]
(d) 46 strokes
In order to lift the car up 13 cm (0.13 m), we have to divide this value by the displacement of the car for each stroke, so we have:
[tex]n=\frac{0.13 m}{0.0028 m}=46.4 \sim 46[/tex]
(e) 1491 J
The work done during all of the strokes is equal to the gravitational potential energy gained by the car while being lifted 13 cm, so it is equal to the value found in part b):
W = 1491 J
What type of heat transfer occurs when particles bump into each other?
A.Convection
B.Insulation
C.Thermal Conduction
D.Thermal Radiation
What type of heat transfer occurs when particles bump into each other?
A.Convection
B.Insulation
C.Thermal Conduction
D.Thermal Radiation
Thermal conduction.
The particles bump into nearby particles and make them vibrate more which passes through the substance from the hot end to the cold end
If an ideal monatomic gas undergoes an adiabatic expansion, in which the volume increases by a factor of 4.0, by what factor does the pressure change?
a) 2.1
b) 1.7
c) 0.52
d) 0.25
e) 0.099
Answer:
e) 0.099
Explanation:
For an adiabatic expansion:
[tex]P_1 V_1^{\gamma} = P_2 V_2^{\gamma}[/tex]
where
P1 is the initial pressure
P2 is the final pressure
V1 is the initial volume
V2 is the final volume
[tex]\gamma[/tex] is the adiabatic index (which is [tex]\frac{5}{3}[/tex] for an ideal monoatomic gas
In this problem, we have
[tex]V_2 = 4 V_1[/tex] since the volume increases by a factor 4
We can re-write the equation to find by what factor the pressure changes:
[tex]\frac{P_2}{P_1}=(\frac{V_1}{V_2})^{\gamma}=(\frac{V_1}{4V_1})^{5/3}=(\frac{1}{4})^{5/3}=0.099[/tex]
Bernoulli's principle can be used to explain the lift force on an airplane wing. How must an airplane's wing be designed to ensure that Bernoulli's principle is applicable? Bernoulli's principle can be used to explain the lift force on an airplane wing. How must an airplane's wing be designed to ensure that Bernoulli's principle is applicable? Airplane wings must be designed to ensure that air molecules move more rapidly over the top surface of the wing, creating a region of lower pressure. Airplane wings must be designed to ensure that air molecules are deflected downward after hitting the wing. Airplane wings must be designed to ensure that air molecules move more rapidly past the bottom surface of the wing, creating a region of higher pressure. Airplane wings must be designed to ensure that air molecules are deflected upward after hitting the wing. Airplane wings must be designed so that they are thick enough to ensure a significant pressure difference between the top and bottom surfaces of the wings.
Answer:
Airplane wings must be designed to ensure that air molecules move more rapidly over the top surface of the wing, creating a region of lower pressure.
Explanation:
Answer:
Airplane wings must be designed to ensure that air molecules move more rapidly over the top surface of the wing, creating a region of lower pressure.
Explanation:
Swiss physicist Daniel Bernoulli proposed a principle for fluid flow, which can be stated as follows: "If the speed of a fluid particle increases as it flows along a current line, the fluid pressure must decrease and vice versa".
This knowledge allows us to understand why airplanes are able to fly. In the upper part of the wing the air velocity is higher (the particles travel a greater distance at the same time), therefore, the pressure on the upper surface is less than on the lower surface, which ends up creating a holding force from below to up.
With this principle, we can say that the wings of the airplane must be designed to ensure that air molecules move more quickly over the upper surface of the wing, creating a region of less pressure.
Nuclei that lie outside the ______ undergo spontaneous radioactive decay.
Nuclei outside the band of stability undergo radioactive decay, transforming into more stable isotopes. Instability does not necessarily mean rapid decay, as exemplified by uranium-238. Unstable nuclides like those experiencing beta decay transform into other elements or isotopes through the process of radioactive transformation.
Nuclei that lie outside the band of stability undergo spontaneous radioactive decay. These unstable nuclei that are to the left or to the right of the band on the chart of nuclides will transform into other nuclei that are in, or closer to, a state of stability. This decay changes the number of protons and neutrons in the nucleus, resulting in a different element or isotope that is more stable.
It's important to note that being "unstable" does not necessarily imply a substance will decay quickly. For instance, uranium-238 is a prime example of an unstable nucleus due to its ability to decay over a stretched period; while it is unstable, it does not instantly decompose.
All forms of beta decay are a consequence of the parent nuclide's instability, leading to a transformation that results in a subsequent product of decay. Terms like "radioactive transformation" may be more accurate than "decay," since the process involves the original nucleus splitting into new nuclei rather than vanishing entirely.
The work function for silver is 4.73 eV. (a) Find the cutoff wavelength for silver. (b) What is the lowest frequency of light incident on silver that releases photoelectrons from its surface? Hz (c) If photons of energy 6.41 eV are incident on silver, what is the maximum kinetic energy of the ejected photoelectrons? eV
(a) 263 nm
First of all, let's convert the work function for silver from eV to Joules:
[tex]\phi = 4.73 eV \cdot (1.6\cdot 10^{-19} J/eV)=7.57\cdot 10^{-19} J[/tex]
The energy of the incoming photon is given by:
[tex]E=\frac{hc}{\lambda}[/tex]
where h is the Planck constant, c is the speed of light, [tex]\lambda[/tex] is the photon's wavelength.
The cutoff wavelength is the minimum wavelength for which the photon has enough energy to extract the photoelectron from the material: that means, the wavelength at which the energy of the photon is at least equal to the work function of the material,
[tex]E=\phi[/tex]
Substituting and solving for the wavelength,
[tex]\frac{hc}{\lambda}=\phi\\\lambda=\frac{hc}{\phi}=\frac{(6.63\cdot 10^{-34}Js)(3\cdot 10^8 m/s)}{7.57\cdot 10^{-19} J}=2.63\cdot 10^{-7} m = 263 nm[/tex]
(b) [tex]1.14\cdot 10^{15}Hz[/tex]
The lowest frequency of light incident on silver that releases photoelectrons from its surface is the frequency corresponding to the wavelength we found at point (a); using the relationship between frequency and wavelength:
[tex]f = \frac{c}{\lambda}[/tex]
And substituting numbers, we find
[tex]f = \frac{3\cdot 10^8 m/s}{2.63\cdot 10^{-7} m}=1.14\cdot 10^{15}Hz[/tex]
(c) 1.68 eV
The equation for the photoelectric effect is:
[tex]E=\phi + K_{max}[/tex]
where
E is the energy of the incoming photon
[tex]\phi[/tex] is the work function
[tex]K_max[/tex] is the maximum kinetic energy of the photoelectrons
Since
E = 6.41 eV
[tex]\phi = 4.73 eV[/tex]
The maximum kinetic energy of the photoelectrons is
[tex]K_{max}=E-\phi=6.41 eV-4.73 eV=1.68 eV[/tex]
Dos bolas, de masas mA = 40 g y mB =60 g, esta?n suspendidas como se observa en la figura. La bola ma?s ligera se jala en un a?ngulo de 60° con respecto a la vertical y se libera. A) ?Cua?l es la velocidad de la bola ma?s ligera antes del impacto? B) ?Cua?l es la velocidad de cada bola despue?s de la colisio?n ela?stica? C) ?Cua?l sera? la altura ma?xima de cada bola despue?s de la colisio?n ela?stica?
The conservation laws of energy, momentum, and kinetic energy are used to determine pre-collision and post-collision velocities of two balls, as well as their maximum heights after an elastic collision.
Explanation:The student has asked about the velocities of two balls before and after an elastic collision and the maximum height they reach after the collision. Assuming no air resistance, the conservation of energy principle can be used to find the initial velocity of the lighter ball by equating potential energy at 60° to kinetic energy at the point just before impact.
Afterward, the conservation of momentum and kinetic energy can be used to determine the velocities of both balls post-collision. The final velocities can then be used with the conservation of energy again to find the maximum height each ball reaches after the elastic collision.
It's important to remember that, for an elastic collision, both conservation of momentum and conservation of kinetic energy hold true. So, the total kinetic energy before and after the collision remains constant, as well as the total momentum of the system. Applying these laws yields the final velocities for each mass, and subsequently, energy conservation can determine the maximum heights.
TRUE OR FALSE? earth revolves around the sun tilted on its axis
The axis of the Earth's rotation is tilted relative to the plain of the Earth's revolution around the Sun.
The question is worded very poorly, but you'd have to say it's TRUE.
True. The tilt of the axis is what leads to varying seasons around the year.
An archer shot a 0.06 kg arrow at a target. The arrow accelerated at 5,000 m/s2 to reach a speed of 50.0 m/s as it left the bow. During this acceleration, what was the net force on the arrow to the nearest newton?
Answer:
300 N
Explanation:
The net force acting on the arrow is given by Newton's Second Law:
[tex]F=ma[/tex]
where
m = 0.06 kg is the mass of the arrow
a = 5,000 m/s^2 is the acceleration of the arrow
Substituting the numbers into the equation, we find
[tex]F=(0.06 kg)(5,000 m/s^2)=300 N[/tex]
Answer:
300 N
Explanation:
because it is
Which state of matter has the highest entropy
Entropy is the measure of the disorder of a system and is a function of state. That is, it depends only on the state of the system.
In this sense, in the gaseous state is where the greatest entropy occurs, since in a gas the particles acquire greater freedom and kinetic energy to move.
Another aspect that influences the increase in entropy is the increase in temperature. This is because, when raising the temperature, the kinetic energy of the molecules, atoms or ions increases, and, therefore, they move more.
Choose all of the following that are examples of electromagnetic radiation.Sound waves ,Microwaves, All of these, "The Force", Infared Waves, Water waves, Visible light, None of these
Answer:
Microwaves
Infrared Waves
Visible Light
Explanation:
Electromagnetic waves consist of oscillating electric and magnetic field, which vibrate in a direction perpendicular to the direction of motion of the wave (for this reason, they are called transverse waves).
Electromagnetic waves are the only waves that do not need a medium to propagate: in fact, they can travel through a vacuum as well.
Electromagnetic waves are classified into 7 different types depending on their frequency. From highest to lowest frequency, they are:
Gamma rays
X-rays
Ultraviolet
Visible light
Infrared Waves
Microwaves
Radio waves
All the other options are a different type of waves, called 'mechanical waves', therefore they are not electromagnetic waves.
The examples of electromagnetic radiation provided are Microwaves, Infrared Waves and Visible Light. Sound waves, water waves or 'The Force' are not considered electromagnetic radiation.
Explanation:The examples of electromagnetic radiation from the options provided are: Microwaves, Infrared Waves and Visible Light. Electromagnetic radiation refers to the waves of the electromagnetic field, propagating through space, carrying electromagnetic radiant energy. For instance, microwaves, infrared waves, and visible light are all types of electromagnetic radiation, differing in their wavelengths and frequencies.
Importantly, sound waves and water waves are not types of electromagnetic radiation as they require a medium to travel and are mechanical in nature. Also, 'The Force' is not related to this concept, it seems to be a reference to the Star Wars franchise.
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Which word means "to get away from something"?
a become b dream c escape d practice
The correct answer is - c. escape.
The word ''escape'' means to get away from something. This word can be used for multiple different situations, and it can refer to both physical and psychological matters.
In a physical sense it can be used to escape from certain unpleasant, or dangerous situation. Example: I have to escape from this prison.
In a psychological sense it can be used to escape, move away, from a certain state of mind. Example: I have to find an escape from my depressive thoughts.
please help on this physics question?
the answer would be C
The product nuclei may or may not be _______
Answer:
i have no clue
Explanation:
Some elements have a low degree of freedom and high intermolecular forces between its molecules. These elements are ________ at room temperature.
Solid
Explanation;Some elements have a low degree of freedom and high intermolecular forces between its molecules. These elements are solid at room temperature.Elements can be classified based on physical states, or the states of matter. At room temperature and pressure the Physical States, or states of matter, are solids, gases or liquids and these are referred to as the 3 states of matter. Some elements such as most metals are solids at room temperatures, others such as oxygen, hydrogen, nitrogen, etc are a gases and others are liquids.Answer: Solid
Explanation:
because solids particles close together making it harder for them to move.
Can work be done on a system if there is no motion?
there is no motion in the direction of the force, then no work is done by that force. ... But the work done on the box is zero since by moving in a straight line at constant speed, its energy is remaining the same.
Work can be performed on a system without observable motion. An example of this is potential energy, where work is spent to change an object's state even if it doesn't result in movement. However, in general physics, work is defined as force multiplied by displacement.
Yes, work can be done on a system even if there is no observable motion. This is often the case when an object is experiencing balanced forces, meaning it remains static or in a state of Static Equilibrium. For instance, if you push a wall, you are exerting energy and doing 'work' but since the wall doesn't move, there is no physical work done.
Another example is potential energy, which is considered as 'stored energy'. It can be associated with the work done to change the position or state of an object, like stretching a spring or lifting a boulder; in these cases work is done even if there isn't resultant motion.
However, in physics, work is technically defined as the product of the force applied to an object and the distance over which that force is applied. Thus, if there is no movement or displacement, then no work is done according to the work-energy theorem. So, defining 'work' might be dependent on the context or specifics of a given problem.
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A total charge of 6.3×10−8 C is distributed uniformly throughout a 2.7-cm radius sphere. The
volume charge density is:
Answer:
The volume charge density of the sphere is [tex]7.64\times 10^{-4}\ C/m^3[/tex].
Explanation:
It is given that,
Charge, [tex]q=6.3\times 10^{-8}\ C[/tex]
Radius of the sphere, r = 2.7 cm = 0.027 m
Total charge contained divided by its volume is called volume charge density. Mathematically, it is given by :
[tex]\rho=\dfrac{Q}{V}[/tex]
[tex]\rho=\dfrac{Q}{4/3\pi r^3}[/tex]
[tex]\rho=\dfrac{6.3\times 10^{-8}}{4/3\pi (0.027)^3}[/tex]
[tex]\rho=7.64\times 10^{-4}\ C/m^3[/tex]
So, the volume charge density of the sphere is [tex]7.64\times 10^{-4}\ C/m^3[/tex]. Hence, this is the required solution.
What is the difference between transverse waves and longitudinal waves?
A.both move perpendicularly to the direction of energy movement
B.transverse waves move parallel and longitudinal waves move perpendicular to the direction of energy movement
C.both move parallel to the direction of energy movement
D.transverse waves move perpendicular and longitudinal waves move parallel to the direction of energy movement
Answer:
D.transverse waves move perpendicular and longitudinal waves move parallel to the direction of energy movement
Explanation:
Transverse wave : It is defined as the wave in which the the vibration of the particles of the medium through which the wave travel is perpendicular to the direction of motion of the wave. Example : electromagnetic wave
Longitudinal wave : It is defined as the wave in which the the vibration of the particles of the medium through which the wave travel is parallel to the direction of motion of the wave. example : Sound wave
The difference between transverse waves and longitudinal waves is that transverse waves move perpendicular and longitudinal waves move parallel to the direction of energy movement; option D.
What are transverse waves?Transverse waves are waves whose durection is perpendicular to the the direction of tye vibration of the medium.
Examples of transverse waves are light waves, gamma rays, etc.
What are longitudinal waves?Longitudinal waves are waves which travel in the same direction as the vibration of the medium.
Examples of longitudinal waves are sound waves in air.
Therefore, the difference between transverse waves and longitudinal waves is that transverse waves move perpendicular and longitudinal waves move parallel to the direction of energy movement.
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Strip electrons from an atom and the atom becomes a
It becomes a positive ion
Participating in team sports can have a positive effect on all aspects of life. Please select the best answer from the choices provided. T F
Answer: True
Explanation:
Participating in team sports can lead to the development of healthy fellowship and brotherhood behavior among the participants. It induces team spirit and allows to lead a healthy competition. It can be a good recreational activity which can be used for removing the emotional and physiological stress. Hence, can improve positivity in all aspects of life.
What is the difference between transverse and longitudinal waves?
Transverse waves always carry more energy than do longitudinal waves.
Transverse waves always travel at smaller speeds than do longitudinal waves.
Transverse waves always have greater frequencies than do longitudinal waves.
In a transverse wave the disturbance always occurs parallel to the line of travel of the wave, whereas in a longitudinal wave the disturbance always occurs perpendicular to the direction in which the wave travels.
In a transverse wave the disturbance always occurs perpendicular to the direction in which the wave travels, whereas in a longitudinal wave the disturbance always occurs parallel to the line of travel of the wave.
is there any multiple choice answers
Corrosive substances are rarely harmful to human skin.
True False
Most problems addressed by the technological design process have only one solution.
True False
Corrosive substances are rarely harmful to human skin. This statement is False. Corrosive substances are ALMOST ALWAYS harmful to the skin.
Most problems addressed by the technological design process have only one solution. This statement is also False. There is more than one way to skin a cat.
Answer:
False. Corrosive substances are harmful to human skin.
False. Most problems addressed by the technological design process have more than one solution.
Explanation:
Corrosive substances have a high tendency to damage other substances which it comes in contact with. They could either by concentrated acid or a base which are very harmful to human skin. These have the capacity to destroy, disfigure or burn any part of human body that comes in contact with the substance.
Technological design is the process of developing appropriate knowledge into physical solutions to solve various problems. In technology, there are always more than a solution to a problem, as there are different ways to solve technological problems.
Thus, the answers to the two questions is false.
If you walk a distance of 8 blocks and then 3 blocks south from home, what is your position compared to home? What distance did you walk?
The position compared to that of home is a reference to displacement, I believe.
Displacement = x total - x initial
So I believe the answer is 5 blocks due north (if you’re walking linearly from your home), unless the questions is referring to relative displacement, in which then you’d need to use the Pythagorean theorem to find the hypotenuse between both positions. And then you’d have to find theta for the degrees between the south direction and the other unmentioned direction. But I don’t think that’s the case.
Distance refers to x total and doesn’t care for direction, as this refers to a scalar quantity opposed to a vector. Thus the equation is just
d = x
So 8 blocks + 3 blocks = a distance of eleven blocks walked total
A uniform 4.4 t magnetic field points north. if an electron moves vertically downward (toward the ground) with a speed of 2.5 × 107 m/s through this field. the charge on a proton is 1.60×10−19 .
a.what is the magnitude of the force acting on it? answer in units of n.
The magnitude of the force acting on the electron is approximately 1.76x10^-11 N.
Explanation:To calculate the magnitude of the force acting on the electron, we can use the equation:
F = qvB
Where:
F is the force q is the charge of the particle v is the velocity of the particle B is the magnetic field
Plugging in the values:
q is the charge of an electron, which is -1.60x10-19 C v is the velocity of the electron, which is 2.5x107 m/s B is the magnetic field, which is 4.4 T
Now we can calculate the force:
F = (-1.60x10-19 C) * (2.5x107 m/s) * (4.4 T)
Simplifying the equation gives us:
F ≈ -1.76x10-11 N
Therefore, the magnitude of the force acting on the electron is approximately 1.76x10-11 N.
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A solid object can be deformed in threee fundamental ways. Consider a block of steel that has sunk to the bottom of a lake. The deformation of the block due to water pressure is A. Compression and Tension B. Bulk C. Shear
The answer would be B) Bulk.
On a particle level, what happens when thermal conduction occurs within a liquid?
A.When fast particles rise to the top.
B.When slow particles sink to the bottom.
C.When particles stop moving.
D.When the average speed of particles is the same throughout the liquid.
Answer:
a) When fast particles rise to the top.
Explanation:
Heat is a form of energy that can be studied through the thermal agitation of the molecules that a material involves. When heat is delivered to a body, its temperature increases, the mobility of its molecules increases. In this way, the system is not in thermal equilibrium: the temperature at each point of the body is different and the variations over time.
There are three forms of heat transmission: conduction, convection and radiation. In conduction, heat is transferred only because of molecular movement and shocks between fast and slow molecules, without displacement of matter. Convection is due to the global movement of matter and is only important in liquids and gases. Radiation is an electromagnetic interaction between bodies and does not require the existence of a material means to transmit heat from one to another. The conduction of heat in a medium can be more or less favorable according to the material.
when the average speed of particles is the same throughout the liquid
Explanation:
If the mass of the earth and all objects on it were suddenly doubled, but the size remained the same, the acceleration due to gravity at the surface would become
A) 1/2 of what it now is.
B) 2 times what it now is.
C) 1/4 of what it now is.
D) the same as it now is.
E) 4 times what it now is.
its a i just have to type more but its a
The answer is B) 2 times what it is now.
Which is an example of a mixture? A. water B. trail mix C. hydrogen D. carbon dioxide
B. trail mix
because you can easily take all the peaces out unlike water you cant physically take the oxygen out
please make me the brainliest
Jorge traveled 5 miles to school. After school, he traveled 1 mile to the Boys and Girls club and then traveled 6 miles back home. What was the distance of Jorge’s trip?
A. 0 miles
B. 5 miles
C. 11 miles
D. 12 miles
I'm not completely sure what you mean by his "trip".
You've described three trips that day:
==> from home to school
==> from school to the club, and
==> from the club to home.
You also clearly listed the distance for each of those trips, so I don't think that's what you're asking.
I think you're asking about Jorge's total distance for the day, after he finished all three trips.
That distance is (5mi + 1mi + 6mi) = 12 miles. (choice-D)