An eyeglass lens is cut with one surface having a radius R1 and the other surface having a radius R2, with R1 < R2. Both positive radii are measured from the same side with R1 being the side closer to the eye. Is this convex-concave lens a converging lens or a diverging lens?
a. This is a converging lens.
b. This is a diverging lens.
c. This can be either a converging or diverging lens, as more information is needed for a final determination.
d. This is neither since a lens cannot be made this way.
Answer:
c
Explanation:
c. This can be either a converging or diverging lens, as more information is needed for a final determination.
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How does the diffraction band of blue light look in comparison with the red light?
No changes
Diffraction pattern becomes narrower
Diffraction pattern becomes broader
Diffraction pattern disappears
Diffraction pattern becomes narrower
Recall the term ( ROYBGIV )
R - red ( diffracted most )
O - orange
Y - yellow
B - blue
G - green
I - indigo
V - violet ( diffracted least )
As we go down the group, the diffraction decreases/becomes narrowerDiffraction increases with the increase in wavelength and vice versaWhich describes the life of Rene Descartes
How many seconds would an Olympic skier take to race down a 2500 meter course going 250 m/sec?
Answer:
10 seconds
Explanation:
Hope this is right and that it helps.
You see if the skier is going 250 meters a second 250 times 10 is 2500 so it would take the skier 10 seconds.
Answer:
10 sec.Explanation:
distance = 2500 meters
velocity = 250 meter/second
time = distance / velocity
= 2500 meters
250 meter/second
= 10 sec.
How much heat is required to warm 230 g of water from 12°C to 90°C?
(Specific Heat of Water = 4.184)
Myra solved an inequality to determine the number of rolls of wrapping paper the school band must sell to meet their fundraising goal. The number line below shows the solution to the inequality. A number line going from 184 to 190. An open circle is at 188. Everything to the right of the circle is shaded. Which phrase best describes the number of rolls the band must sell?
The solution of the inequality means that the band must sell more than 188 rolls of wrapping paper.
How to interpret a solution of an inequality?
We are told that the solution to the inequality is represented with a number line that goes from 188 to 190, such that we have an open circle at 188 and all the region to the right is shaded.
The open circle means that the point itself is not a solution, and because the region at the right is shaded, the solutions are larger than 188, then the solution of this inequality will be:
188 < x.
If x represents the number of rolls of wrapping paper that the band must sell, this means that the band must sell more than 188 rolls of wrapping paper.
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How can the intensity of a sound be changed without changing the pitch
Answer:
Sound waves are greatly affected by the medium in which they travel, not just in terms of speed, but also in terms of loudness and tonal quality. Just think of the variation in loudness and sound quality of different acoustic guitars which may use the same strings, but the sound is greatly affected by the different media in which it travels, including the wood, sound cavities, even the varnish on the instrument.
Explanation:
How are common traits used to define a species?
Answer:
A species is often defined as a group of individuals that actually or potentially interbreed in nature. ... The definition of a species as a group of interbreeding individuals cannot be easily applied to organisms that reproduce only or mainly asexually. Also, many plants, and some animals, form hybrids in nature.
Explanation:
Answer:
A species is often defined as a group of individuals that actually or potentially interbreed in nature. ... The definition of a species as a group of interbreeding individuals cannot be easily applied to organisms that reproduce only or mainly asexually. Also, many plants, and some animals, form hybrids in nature.
Explanation:
hope it helps
Carbon has an atomic number of 6 . Based on this evidence , what can you claim about catbon.
Pls help me in this question below
Answer:
b
Explanation:
Sir Isaac Newton explain the ocean tides result from the gravitational attraction of the Sun and Moon on the oceans of the Earth
How do a proton and neutron compare?
a. They are both found in the nucleus
b. the proton has the greater mass
c. They have opposite charges
d. The proton is farther from the nucleus
Answer:
A.
Explanation:
The answer should be A. because both the protons and neutrons are found in the nucleus. Also the other choices don’t make sense or don’t apply.
I hope it helps! Have a great day!
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discuss the role of global ization in the development of SI unit
Answer:
Sharing of information
Explanation:
The development of SI unit has helped in the sharing of scientific as well as techical information internationally.
HOPE THIS HELPED
ENJOY YOUR DAY / NIGHT:)
is it possible to change a capacitor to any potential
Answer:
You can charge capacitor to any potential as long as charging voltage is less than rated voltage value of the capacitor. The voltage across a capacitor is limited by the dielectric strength of the insulating material times its thickness.
Need answers only for question 4 & 5
Need the correct answer ASAP.
Will give the brainliest!
#4
Resistors are connected in parallel circuit
Voltage is constant as usual in circuitsCurrent is different#5
They differs
Because
For series connection
[tex]\\ \rm\rightarrowtail R_{net}=R_1+R_2\dots[/tex]
For parallel connection
[tex]\\ \rm\rightarrowtail \dfrac{1}{R_{net}}=\dfrac{1}{R_1}+\dfrac{1}{R_2}\dots[/tex]
So resistance becomes low in parallel circuitSo, here for question no. 4 and 5, we are given a Diagram, which have 3 resistors connected in parallel each having a resistance of [tex]{\bf{2\Omega}}[/tex], [tex]{\bf{3\Omega}}[/tex] and [tex]{\bf{4\Omega}}[/tex]. And we are told to find a factor which will change for the given combination, and a factor which will not change, So here, as the resistors are connected in parallel, so the voltage will remain same for all the resistors, while the Current will be different for every resistor, And that's what the reason of why we always do connection in parallel for home purposes, because, we need voltage same in every resistor of the circuit. So, the factor which will change is [tex]{\boxed{\bf{Current}}}[/tex] and the factor which willn't change is [tex]{\boxed{\bf{Voltage}}}[/tex], and if the resistors were connected in Series combination, then current should be same for all resistors, while voltage will change.
Well, if the resistors are connected in the above way we have, and if we call our Resistors as [tex]{\bf{R_{1}}}[/tex], [tex]{\bf{R_{2}}}[/tex] and [tex]{\bf{R_{3}}}[/tex], then the equivalent resistance we will be having is :
[tex]{:\implies \quad \boxed{\bf{\dfrac{1}{R_{eq.}}=\dfrac{1}{R_1}+\dfrac{1}{R_2}+\dfrac{1}{R_3}}}}[/tex]
Also, we can prove this fact just with the help of the reason provided in the above question, i.e that in Parallel combination, voltage remains same, but current changes, while in Series combination, current remains same but voltage changes, so we are just gonna prove the formula for both series combination and Parallel as well
So, let's prove the formula for series combination first, so consider n resistors connected in series, let Resistors as [tex]{\bf{R_{1},R_{2},R_{3}\cdots \cdots R_{n}}}[/tex], now as current will be same through all the resistors as connected in series, so if the current [tex]{\bf{I}}[/tex] from then, same current will flow through the whole circuit and each resistors, also let the voltages of every resistors being [tex]{\bf{V_{1},V_{2},V_{3}\cdots \cdots V_{n}}}[/tex], so now by Ohm's law, we can deduce that, the current from first circuit will be [tex]{\bf{V_{1}=IR_{1}}}[/tex]...and so on for all Resistors, and now if we add all resistors, so the equivalent Voltage will just be ;
[tex]{:\implies \quad \sf V_{eq.}=V_{1}+V_{2}+V_{3}+\cdots \cdots +V_{n}}[/tex]
[tex]{:\implies \quad \sf IR_{eq.}=IR_{1}+IR_{2}+IR_{3}+\cdots \cdots IR_{n}}[/tex]
[tex]{:\implies \quad \sf I(R_{eq.})=I(R_{1}+R_{2}+R_{3}+\cdots \cdots R_{n})}[/tex]
[tex]{:\implies \quad \boxed{\bf{R_{eq.}=R_{1}+R_{2}+R_{3}+\cdots \cdots R_{n}}}}[/tex]
Therefore, we proved for series.
Now, consider n resistors connected in parallel, with resistances, [tex]{\bf{R_{1},R_{2},R_{3}\cdots \cdots R_{n}}}[/tex], now as voltage will be same through all the resistors as connected in parallel,while current will change, so let total voltage be [tex]{\bf{V}}[/tex], and current for each resistor as [tex]{\bf{I_{1},I_{2},I_{3}\cdots \cdots I_{n}}}[/tex],so by using the same concept as above we can write by using ohm's law :
[tex]{:\implies \quad \sf I_{eq.}=I_{1}+I_{2}+I_{3}+\cdots \cdots +I_{n}}[/tex]
Rewrite using ohm's law :
[tex]{:\implies \quad \sf \dfrac{V}{R_{eq.}}=\dfrac{V}{R_1}+\dfrac{V}{R_2}+\dfrac{V}{R_3}+\cdots \cdots +\dfrac{V}{R_n}}[/tex]
[tex]{:\implies \quad \sf V\dfrac{1}{R_{eq.}}=V\bigg(\dfrac{1}{R_1}+\dfrac{1}{R_2}+\dfrac{1}{R_3}+\cdots \cdots +\dfrac{1}{R_n}\bigg)}[/tex]
[tex]{:\implies \quad \boxed{\bf{\dfrac{1}{R_{eq.}}=\dfrac{1}{R_{1}}+\dfrac{1}{R_{2}}+\dfrac{1}{R_{3}}+\cdots \cdots +\dfrac{1}{R_{n}}}}}[/tex]
Hence, we proved for Parallel combination too
Also, refer to the attachment for a better understanding, and just a point that Voltmeter is always connected in parallel while ammeter in series, and all the things above are taken in SI units
El neumático de un automóvil se infla a una presión manométrica de 207 KPa la cual equivale a(30 lb/in²) en un momento en que la presión de los alrededores es de 1 atmosfera (1 atm = 101,3 KPa) y la temperatura es de 25 °C. Después de manejarlo, la temperatura del aire del neumático aumenta a 40 °C. Supongamos que el volumen del gas cambia sólo ligeramente. ¿Cuál es la nueva presión manométrica en el neumático?
Answer:
La nueva presión manométrica en el neumático es 117,48 kilopascales.
Explanation:
Supongamos que el gas contenido en el neumático del automóvil se comporta como un gas ideal, cuya ecuación de estado es:
[tex]P\cdot V=n\cdot R_{u}\cdot T[/tex] (Eq. 1)
Donde:
[tex]P[/tex] - Presión absoluta del aire, medido en kilopascales.
[tex]V[/tex] - Volumen del aire, medido en metros cúbicos.
[tex]n[/tex] - Cantidad molar del aire, medida en moles.
[tex]T[/tex] - Temperatura del aire, medida en Kelvin.
[tex]R_{u}[/tex] - Constante universal de los gases ideales, medida en kilopascal-metros cúbicos por mol-Kelvin.
Si sabemos que el neumático experimenta un proceso isocórico e isomolar de calentamiento y presurización, entonces podemos reducir la ecuación de estado a la siguiente relación:
[tex]\frac{P_{A}}{T_{A}} = \frac{P_{B}}{T_{B}}[/tex] (Eq. 2)
Donde:
[tex]P_{A}[/tex], [tex]P_{B}[/tex] - Presiones absolutas inicial y final del aire, medidas en kilopascales.
[tex]T_{A}[/tex], [tex]T_{B}[/tex] - Temperaturas inicial y final del aire, medidas en Kelvin.
Despejamos la presión absoluta final del aire:
[tex]P_{B} = \frac{T_{B}}{T_{A}}\cdot P_{A}[/tex]
La presión absoluta es la suma de la presión atmosférica y la presión manométrica, todas medidas en kilopascales. La presión absoluta inicial del aire es:
[tex]P_{A} =101,3\,kPa + 207\,kPa[/tex]
[tex]P_{A} = 208,3\,kPa[/tex]
Si [tex]T_{A} = 298,15\,K[/tex], [tex]T_{B} =313,15\,K[/tex] y [tex]P_{A} = 208,3\,kPa[/tex], la presión absoluta final del aire es:
[tex]P_{B} = \left(\frac{313,15\,K}{298,15\,K} \right)\cdot (208,3\,kPa)[/tex]
[tex]P_{B} = 218,780\,kPa[/tex]
Ahora, la presión manométrica final en el neumático es:
[tex]P_{man, B} = 218,780\,kPa-101,3\,kPa[/tex]
[tex]P_{man, B} = 117,48\,kPa[/tex]
La nueva presión manométrica en el neumático es 117,48 kilopascales.
A ball starts from rest and rolls down a track 20 meters long in 3 seconds.
What is the ball's acceleration?
An air mass boundary where a low moisture air mass meets a high moisture air mass is called a ______.
An air mass boundary where a low moisture air mass meets a high moisture air mass is called a dry line. It is fundamental in meteorology.
What is a dry line?A dry line is a transect line capable of splitting (dividing) the moist (atmospheric) air and dry air.
The dry line can also be defined as a roughly real boundary between two different masses of air (humid and dry).
The dry line can be used to schematize how is the movement of the most and dry air masses in a front.
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If an object accelerates from rest, what will its velocity be after 2.1 s, if it has a constant acceleration of 9.8 m/s²?
If an object accelerates from rest, the velocity after 2.1 s, if it has a constant acceleration of 9.8 m/s² is 43.218 m/s².
To find the velocity, the given values are,
Time = 2.1 seconds
Acceleration = 9.8 m/s².
What is Acceleration?Acceleration can be defined as the rate of change of the velocity of an item with appreciation to time. Accelerations can be vector portions. The orientation of an item's acceleration is given by the orientation of the net pressure appearing on that object.
The acceleration will remain the same at 9.8 m/s². as under free fall conditions acceleration due to gravity remains constant.
Calculation:-
V = U + at
V = 0 + 9.8 × (2.1)²
= 9.8 × 4.41
= 43.218 m/s².
But, the acceleration will remain the same at 9.8 m/s neglecting air resistance.
Acceleration is the charge at which velocity modifications with time, in terms of each speed and route. A factor or an object moving in a straight line is accelerated if it quickens or slows down. movement on a circle is extended despite the fact that the rate is consistent because the course is continually changing.
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Imagine that someone is sitting down to enjoy a cup of coffee or hot chocolate. Use your experiences to describe how heat flows from the drink to its surroundings. Be as detailed as possible.
Answer:
The heat flows into my body and I start with a warming feeling going down my throat as it starts there I get this warm feeling and I break out in a coldsweat from consuming a warm drink a cold drink will help cool me down
Explanation:
If drink something warm, you will be warm. If you drink something cool, you will cool down.
A penny is dropped into a well. It takes 5 seconds to fall. Calculate the depth of the well in feet
Please help me! I'm not just looking for answers, I'm honestly confused.
Answer:
its Phyiscs How hard Can It Really Be
A light-year (ly) is a unit of distance defined as thedistance light travels in
one year. Numerically, 1 ly =9 900 000 000 000 km. How many meters are
in alight-year?
Answer:
9 900 000 000 000 km = 9 900 000 000 000 000 m
Explanation:
9 900 000 000 000 * 1000
Why is there a main sequence? (Select all that apply.) There is a relationship between the luminosity and temperature of hydrogen-burning stars. Hydrogen-burning stars reach an equilibrium between the inward gravitational pull on their atoms and the outward pressure of their hot gases, which are heated by energy produced in nuclear reactions. Hydrogen-burning stars of the same mass come in a wide range of luminosities (with a variation in L/Lalchemist sun symbol on the order of about 104). There is a relationship between the luminosity and mass of hydrogen-burning stars. none of these
Based on astronomical records, the reasons why there is main sequence are:
There is a relationship between the luminosity and temperature of hydrogen-burning stars. Hydrogen-burning stars reach an equilibrium between the inward gravitational pull on their atoms and the outward pressure of their hot gases, which are heated by energy produced in nuclear reactions.There is a relationship between the luminosity and mass of hydrogen-burning stars. What is a star?A star can be defined as a giant astronomical or celestial object that comprises a luminous sphere of plasma and it is bounded together by its own gravitational force.
Generally, a star is typically made up of two (2) main hot gases and these include the following:
Hydrogen (H)Helium (He)What is a main sequence?A main sequence refers to a type of star that fuses hydrogen in its core and it has a stable balance of outward pressure as a result of core nuclear fusion and gravitational forces that are pushing inward.
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Which of these examples best shows a change from potential to kinetic energy?
Answer:
Water flowing over a tall cliff
Explanation:
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A 4.0 kg box is pressed into a spring. The spring constant is k=220 n/m. The box is released at the bottom of a frictionless ramp and rises to a height of y=0.75m
A 4.0 kg box is pressed into a spring. The spring constant is k = 220 N/m. The box is released at the bottom of a frictionless ramp and rises to a height of y = 0.75 m as shown below.
How far was the spring compressed?
Answer: 0.52 m
When watching the interstellar movie:
Copper and Dr.Brand we’re on Millers planet for approximately _____ years.
This means that the total time Dr. Mann weren’t without human contact is: ____ years.
According to Newton's second law of
motion, what relationship exists between
mass and acceleration if force is constant?
Answer: acceleration is directly proportional to net force when mass is constant… and that acceleration is inversely proportional to mass when net force is constant…
Explanation:
If the force is constant, then the acceleration will be inversely proportional to the mass.
If the force is constant, then the acceleration will be inversely proportional to the mass.
We have Newton's Second law of Motion.
We have to determine the relation between mass and acceleration if force is constant.
What is Newton's Second law of Motion ?Newton's Second law of motion states that the rate of change of momentum is directly proportional to force applied.
According to the question, we have -
Force = Mass x Acceleration
F = ma
if Force is constant, then -
a = [tex]\frac{F}{a}[/tex]
Hence, if the force is constant, then the acceleration will be inversely proportional to the mass.
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What is the relationship between net force and balanced forces.
The name dinitrogen tetroxide tells you that this compound contains
*
a. two nitrogen atoms and two oxygen atoms.
b. four nitrogen atoms and two oxygen atoms.
c. two nitrogen atoms and four oxygen atoms.
d. four nitrogen atoms and four oxygen atoms.
Answer:
C. two nitrogen atoms and four oxygen atoms
Explanation:
The name dinitrogen tetroxide tells you that this compound contains two nitrogen atoms and two oxygen atoms. The correct answer is a) .
The name "dinitrogen tetroxide" provides information about the composition of the compound. "Dinitrogen" indicates that there are two nitrogen atoms (di- meaning two), and "tetroxide" indicates that there are two oxygen atoms (tetra meaning four in this context).
Therefore, the compound contains two nitrogen atoms and two oxygen atoms. The correct answer is a).
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To span the distance between two switches, why is adding an intermediate switch not an attractive choice
Adding an intermediate switch is not an attractive choice to span the distance between two switches due to expense issues. It may have different ports.
What is a network switch?A switch refers to a hardware tool capable of connecting different computer devices in a network.
A network switch can connect devices on a network by centralizing communications among many devices in a given local area network.
A switch may support different speeds for transmission of data (for example, one gigabit Gbps per second).
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