Answer:
12 N
Explanation:
Use Newton's second law:
∑F = ma
F = (2.4 kg + 1.3 kg) (3.2 m/s²)
F = 11.84 N
Rounded to two significant figures, the force is 12 N.
Which 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.
Help Me !! I have an exam.
What will be velocity, when two bodies move in opposite direction?
1.Negative
2.Possitive
3.Zero
4. 1 and 2 both.
Answer:
I think positive...
.....
......
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
Carbon has an atomic number of 6 . Based on this evidence , what can you claim about catbon.
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.
Read more on stars here: https://brainly.com/question/12175185
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.
Learn more about air masses here:
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What is the relationship between net force and balanced forces.
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.
Learn more about acceleration here,
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A ball starts from rest and rolls down a track 20 meters long in 3 seconds.
What is the ball's acceleration?
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).
Learn more about network switches here:
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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
PLEASE HELP!!!!
Photosynthesis Assignment.
Now that you have learned about photosynthesis, complete the following assignment.
Use the diagram below to show the cycle of photosynthesis. Include the Sun or energy, carbon dioxide, chlorophyll, water, oxygen and glucose or carbohydrates. Show what happens to each of the elements in carbon dioxide, oxygen and water. Use arrows to show the movement of the substances and label the arrows.
Click on the Activity Link button to open the Photosynthesis Master.
Answer:
Explanation:
i just submitted the assignment ill let you know how i do
Answer:
Explanation:
Added arrows and chlorophyll to the plant.
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 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
If you can make it from one end of a football field to the other (100 meters) with an acceleration of 2.2m/s, what would be your top speed if you started from rest?
Answer:
v = 20.57 m/s
Explanation:
Given that,
Acceleration, a = 2.2 m/s²
Initial speed of the person, u = 0 (at rest)
Distance, s = 100 m
We need to find the top speed. It can be calculated using third equation of motion.
[tex]v^2-u^2=2as[/tex]
v is final speed
[tex]v=\sqrt{2as} \\\\v=\sqrt{2\times 2.2\times 100} \\\\v=20.57\ m/s[/tex]
So, the top speed of the person is 20.57 m/s.
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!
Anygays-
Hello people ~
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 versaPLEASE HELP I WILL MARK YOU BRAINLIEST
how does the mass of an object affect its acceleration
Answer:
Explanation:
For an object falling under the influence of gravity, the mass does not affect the acceleration -- that is a constant called "g". As the mass gets larger, it takes a greater force (supplied by the greater weight) to be able to support the same acceleration. g=F/m. The weight (the force) is proportional to mass, so the fraction is the constant g.
Answer:
As the mass of an object is increased, the acceleration of the object is decreased.
My explanation:
I like to think of it as if you have a wooden car going straight forward it will go a certain speed, if you add a 1 pound weight to that very same car it will go slower than the car without the weight.
Hope this Helps! :)
Have any questions? Ask below in the comments and I will try my best to answer.
-SGO
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.
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.
If you want to learn more about inequalities, you can read:
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Please help me! I'm not just looking for answers, I'm honestly confused.
Answer:
its Phyiscs How hard Can It Really Be
A spaceship has a mass of 9000 kg. The spaceship is launched from Earth and lands on a distant planet where it has a weight of 390000 N. What is the acceleration of gravity on this planet?
The acceleration of gravity on the planet where the spaceship is located is 43.3m/s²
HOW TO CALCULATE ACCELERATION:
The acceleration due to gravity of a body can be calculated by dividing the weight of the body by the mass. That is:acceleration (m/s²) = weight (N) ÷ mass (kg). According to this question, a spaceship has a mass of 9000 kg but when launched from Earth to a distant planet, it has a weight of 390000 N. The acceleration of gravity is as follows:Acceleration = 390000N ÷ 9000kgAcceleration = 43.3m/s²Therefore, the acceleration of gravity on the planet where the spaceship is located is 43.3m/s²Learn more at: https://brainly.com/question/21775164?referrer=searchResults
A penny is dropped into a well. It takes 5 seconds to fall. Calculate the depth of the well in feet
At a skills competition, a target is being lifted into the air by a cable at a constant speed. an archer standing on the ground launches an arrow toward the target. the system of equations below models the height, in feet, of the target and the arrow t seconds after it was fired. which statement most likely describes the situation modeled by this system? startlayout enlarged left-brace 1st row h = 8 2 t 2nd row h = 4 32 t minus 16 t squared endlayout the arrow is fired with an initial upward velocity of 2 ft/s. the arrow is fired with an initial upward velocity of 4 ft/s. the arrow is fired with an initial upward velocity of 8 ft/s. the arrow is fired with an initial upward velocity of 32 ft/s.
The arrow is fired with an initial upward velocity of 32 ft/s.option 4 is correct.
What is velocity?The change of displacement with respect to time is defined as the velocity. Velocity is a vector quantity. it is a time-based component.
Velocity at any angle is resolved to get its component of x and y-direction.
The given data in the problem is;
g is the acceleration due to gravity
v₀ is the initial speed=?
h is the initial height = 4+32t-16t²
The relation of the height with the velocity and time is given according to the motion will be;
[tex]h(t)= -\frac{1}{2}gt^ 2+v_0t+h_0 \\\\[/tex]
h = 4+32t-16t²
Hence the value of the v₀ will be 32 ft/sec.
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Answer:
Option 4
Explanation:
i got it right on ed 2022
A student rides her bike to school. Her school is 5 miles from home. She travels at an average rate of 15 miles per hour. How much time does she need?
Answer:
.3 repeating hours
Explanation:
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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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.
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 much heat is required to warm 230 g of water from 12°C to 90°C?
(Specific Heat of Water = 4.184)