Answer:
The answer is option AExplanation:
The new volume can be found by using the formula for Boyle's law which is
[tex]P_1V_1 = P_2V_2[/tex]
Since we are finding the new volume
[tex]V_2 = \frac{P_1V_1}{P_2} \\[/tex]
From the question we have
[tex]V_2 = \frac{5 \times 90000}{145000} = \frac{450000}{145000} = \frac{450}{145} \\ = 3.103448...[/tex]
We have the final answer as
3.10 LHope this helps you
Lvl 2: Select the passage which best describes the motion of the student.
Answer:
Ok I don't get you....
Explanation:
????
A train is travelling at 15 m/s. It accelerates at 3 m/s² for 20 seconds. How far does the train travel in this time?
The distance traveled by the train is 900 m.
The given parameters:
Initial velocity of the train, u = 15 m/sAcceleration of the train, a = 3 m/s²Time of motion, t = 20 sWhat is distance?Distance is a scalar quantity that shows the total path covered by an object.The distance traveled by the train is calculated as follows;
[tex]s = ut + \frac{1}{2} at^2\\\\s = (15 \times 20) + (0.5 \times 3 \times 20^2)\\\\s = 900 \ m[/tex]
Thus, the distance traveled by the train is 900 m.
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Answer:
900m
Explanation:
Use the equation: acceleration (a) = change in velocity (v – u) / time taken (t)
Rearrange to solve for the final velocity (v):
v = u + at
Substitute in values and solve:
v = 15 m/s + 3 m/s2 × 20 s = 75 m/s
Rearrange the equation for uniform acceleration (v2 – u2 = 2as) to solve for distance (s):
s = (v2 – u2) / 2a
s = ((75 m/s)2 – (15 m/s)2) / (2 × 3 m/s2)
s = (5,625 m2/s2 – 225 m2/s2) / 6 m/s2
s = 5400 m2/s2 / 6 m/s2
s = 900 m
Circle the letter of each factor that determines whether a molecule
is polar or nonpolar.
a. the number of atoms in the molecule
b. the type of atoms in the molecule
c. the number of bonds in the molecule
d. the shape of the molecule
plzzzz help me and I will mark u the brainiest
43
Select the correct answer.
According to the law of reflection, what is the relationship between the angle of incidence and the angle of reflection?
OA. The angle of reflection is twice the angle of incidence.
OB.
The angle of reflection is half the angle of incidence.
OC. The angle of reflection is equal to the angle of incidence.
OD. The angle of reflection is independent of the angle of incidence.
ОЕ.
The angle of reflection is always perpendicular to the angle of reflection.
Reset
Next
Answer is c, they are equal:
Explanation:
HELP PLEASE
A load is a device that changes electrical energy into other forms of energy. Which load converts electrical energy into thermal energy by passing an electric current through a high-resistance material?
A.
Hand-powered generator
B.
Toaster
C.
Fan
D.
Electrical drill
Answer:
A toaster because you plug it up for electric energy and heat to toast it
Explica la relación entre momento de torsión y aceleración angular mencionando tres ejemplos Una varilla uniforme delgada mide 1.5 m de longitud y tiene una masa de 6kg si la varilla se hace girar en un centro y se queda en rotación con una velocidad angular de 16 rad/seg calcular la cantidad de movimiento
Answer:
1) τ = I α whereby the torque is provided by the angular acceleration
2) L = 216 Kg m² / s
Explanation:
1) Let's start with Newton's second law
F = m a
multiply by the arm or perpendicular distance
F r = m a r
if the distance is not perpendicular a way of realizing the relations using the vector product
τ = F r = F x r
the bold are vectors. The angular and linear acceleration are related
a = α r=
τ = m (α r) r
τ = (m r²) α
the inertia of the rotational motion is
I = m r²
we substitute
τ = I α
whereby the torque is provided by the angular acceleration.
As an example we have:
* a spinning disk
* a ball rotating in the air
* a pulley
2) The rotational momentum is
L = I w
the moment of inertia of a rod that through its center
I = m L²
we substitute
L = m L² w
let's calculate
L = 6 1.5 2 16
L = 216 Kg m² / s
La cantidad de movimiento angular de la varilla uniforme es 18 kilogramos-metro cuadrado por segundo.
1) La relación entre el momento de torsión ([tex]M[/tex]), una variable cinética y relacionada con la aplicación de una fuerza externa cuya línea de proyección no cruza el centro de masa del objeto, y la aceleración angular ([tex]\alpha[/tex]), una variable cinemática, es la resistencia del cuerpo a rotar, la cual es función de su masa y su geometría, representada por la variable de momento de inercia.
A continuación, presentamos tres ejemplos del concepto:
Giro de una tuerca como consecuencia del giro de una llave inglesa por la acción de una mano y un brazo.Transmisión del movimiento a través de la transmisión de una bicicleta.Cierre de una compuerta mediante una transmisión rígida por engranes y un volante.2) Asumamos que la varilla uniforme es de masa constante, con una rotación a velocidad angular constante y con un centro de rotación localizado en el centro geométrico de la varilla. La cantidad de movimiento es expresada mediante la siguiente ecuación:
[tex]L = I\cdot \omega[/tex] (1)
Donde:
[tex]L[/tex] - Cantidad de movimiento angular, en kilogramos-metro cuadrado por segundo.[tex]I[/tex] - Momento de inercia, en kilogramos-metro cuadrado.[tex]\omega[/tex] - Rapidez angular, en radianes por segundo.El momento de inercia de una varilla uniforme con centro de rotación en el centro queda expresado por la siguiente fórmula:
[tex]I = \frac{1}{12}\cdot m\cdot L^{2}[/tex] (2)
Donde:
[tex]m[/tex] - Masa de la varilla, en kilogramos.[tex]L[/tex] - Longitud de la varilla, en metros.Al aplicar (2) en (1), tenemos la expresión resultante:
[tex]L = \frac{1}{12} \cdot m\cdot L^{2}\cdot \omega[/tex] (3)
Si sabemos que [tex]m = 6\,kg[/tex], [tex]L = 1.5\,m[/tex] y [tex]\omega = 16\,\frac{rad}{s}[/tex], entonces la cantidad de movimiento angular es:
[tex]L = \frac{1}{12}\cdot (6\,kg)\cdot (1.5\,m)^{2}\cdot \left(16\,\frac{rad}{s} \right)[/tex]
[tex]L = 18\,\frac{kg\cdot m^{2}}{s}[/tex]
La cantidad de movimiento angular de la varilla uniforme es 18 kilogramos-metro cuadrado por segundo.
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Given that on the moon g = 1.6 m/s2, and on Earth g = 9.8 m/s2, if a car on the moon weighs 3.8 N, what is its mass on Earth?
Do not write units in your answer, only numbers.
Round to one decimal place.
Answer:
The weight of the car on Earth is 19.6
Explanation:
The given parameters are;
The gravitational acceleration on the moon, [tex]a_{Moon}[/tex] = 1.6 m/s²
The gravitational acceleration on Earth, g = 9.8 m/s²
The weight of the car on the moon = 3.8 N
The weight of an object = The mass of the object, m × The gravitational acceleration acting on the object, g
The weight of the car = The mass of the car × The gravitational acceleration on the moon
∴ 3.8 N = The mass of the car × 1.6
The mass of the car = 3.8/1.6 = 2 kg
The weight of the car on Earth =The mass of the car × The gravitational acceleration on Earth, g
The weight of the car on Earth = 2 × 9.8 = 19.6
The weight of the car on Earth = 19.6.
The depth of a circular well is 5m. water level is below 2m from the upper face of the wall. Find the pressure at its base ? (g=9.8m/ s²)
Explanation:
Given, Depth = 5mReal depth of water = 5m - 2m = 3mg = 9.8 m/s2Pressure at its base =? Now, P = h d g = 3 × 1000 × 9.8 = 29400 pascalThats all,
The pressure at its base given the data from the question is 29400 Pa
Data obtained from the questionDepth = 5 mWater level = 2 mReal depth (h) = 5 - 2 = 3 mAcceleration due to gravity (g) = 9.8 m/s²Density of water (d) = 1000 Kg/m³Pressure (P) =? How to determine the pressureThe pressure can be determined as follow
P = dgh
P = 1000 × 9.8 × 3
P = 29400 Pa
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The white cue ball is moving towards the black 8 ball with a speed of 3.6 m/s. What is the momentum of the white cue ball? (p=mv)
Calculate the density of a rock that has a mass of 32 grams and a volume of
4.5 mL.
Answer:
85.2ml
Explanation:
I WILL MARK BRAINLIEST TO FIRST ANSWER IF CORRECT
In a battery (voltaic cell), in which direction does conventional current flow?
Answer:
In a discharging battery or galvanic cell (diagram at right), the anode is the negative terminal because it is where conventional current flows into the cell.
Explanation
In the lab. construct two half cells, one a zinc half cell and the other a copper half cell.
The zinc metal electrode will more readily ionise to Zn^2+ ion , then the copper metal.
This is because in the reactivity series zinc is more reactive metal.
Hence
connecting the two half cells, the zinc cell is put on the left and the copper half cell on the right.
Connect a wire and voltmeters between the electrodes, and a salt bridge between the two metal ion solutions.
Since the zinc is on the left and loses its electrons more readily the electrons flow from the electrode through the wire and voltmeter to the copper electrode. So the electrons flow from r
left to right.
The conventional eq'n is
Zn|Zn^2+||Cu^2+|Cu
The electrons move into the copper electrode combine with copper solution to form more copper metal, which deposits on the copper electrode.
In a battery (voltaic cell), conventional current flow in the direction from positive to negative.
What is Current ?Current is a flow of charges. it is denoted by i and expressed in ampere A.
Mathematically it is expressed as i = q/t, where q is the amount of charge and t is time. Current is nothing but amount of charges flown in the unit time in the electric wire. Charge is expressed in coulomb C and time in second s. hence coulomb per second (C/s) is ampere A. Charge on electron is 1.60217663 × 10⁻¹⁹ which is called as elementary charge.
There are two types of the current, Convectional current and non-conventional current.
Convectional current is the current flows from positive to negative. Non convectional current flows from negative to positive. Note that flow of electrons is from negative to positive.
Hence direction of flow of conventional current is from positive to negative.
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what is the coefficent for hydrochloric acid
Answer:
HCI
Explanation:
I dont know what you mean by coefficient but that's the thing you would see in the periodic table
The electromagnetic waves used in a microwave ovens has a frequency of 2540000000 Hz. The speed of the waves is 300000000 m/s. What is their wavelength?
Answer:
The wavelength of the waves is approximately 0.12 m.
Explanation:
An electromagnetic waves are generated as a result of the interaction between electric and magnetic fields. They do not require material medium for their propagation, and travel at the same speed (i.e the speed of light).
The speed, frequency and wavelength of a wave are related by:
speed = frequency x wavelength
wavelength = [tex]\frac{speed}{frequency}[/tex]
Given: speed of the wave = 3 x [tex]10^{8}[/tex], frequency = 2.54 x [tex]10^{9}[/tex].
Thus,
wavelength = [tex]\frac{300000000}{2540000000}[/tex]
= 0.11811
≅ 0.12
wavelength ≅ 0.12 m
Therefore, the wavelength of the waves is 0.12 m.
Which arrow represents the centripetal acceleration?
Answer:
x
Explanation:
because the force on the car by gravity adds speed and acceleration.
What is the speed of a
rocket that travels
8,000m in 13 seconds?
Answer:
speed of rocket=615.38m/s
Explanation:
What are the three forms of Newton’s 3rd Law?
Answer:
The third law states that all forces between two objects exist in equal magnitude and opposite direction: if one object A exerts a force FA on a second object B, then B simultaneously exerts a force FB on A, and the two forces are equal in magnitude and opposite in direction: FA = −FB.
Answer:
1 an object at motion will remain at motion and a object at rest will remain at rest until a outward force acts upon it
2 force is equal to mass multiple acceleration
3 if an object is acted on with a downward force the object will reflect with a same net force in the opposite direction
Explanation:
What is the mass of a falling rock if it produces a force of 147 N with an acceleration of 9.8 m/s2?
Answer:
15 kgExplanation:
The mass of the object can be found by using the formula
[tex]m = \frac{f}{a} \\ [/tex]
f is the force
a is the acceleration
From the question we have
[tex]m = \frac{147}{9.8} \\ [/tex]
We have the final answer as
15 kgHope this helps you
What is a population?
Answer:
:)
Explanation:
Population is how many people or citizens are in that country or continent.
HURRY PLEASE!!I’ll mark you as brainiest!! 15 points
compare the circuits and lightbulbs below. which would be brighter? a or b? explain why.
Answer:
I think A. would be brighter
Explanation:
Circuit A has only one bulb so it gets 100% of the electricity
Circuit B has two bulbs which means that they only get 50% of the electricity because it has to be split equally.
Hope it helps!
why is SI unit established
Explanation:
The SI was established in 1960 by the 11th General Conference on Weights and Measures (CGPM, Conférence Générale des Poids et Mesures). The CGPM is the international authority that ensures wide dissemination of the SI and modifies the SI as necessary to reflect the latest advances in science and technology.
The space shuttle design team spent two years working with sketches and models before building the shuttle. Why were these steps important?
1.Sketches and models allowed for the design to be modified before investing huge amounts of time and money to build the actual shuttle.
2.Sketches and models allowed for many different astronauts to provide input on the design of the shuttle before investing money in the actual shuttle.
3.Sketches and models helped astronauts in their training program as they prepared for their missions.
Answer:
sketches and models helped astronauts in their training program as they prepare for their missions
If the starting population of 5 rabbits grows at 200% each year, how many will there be 50 years?
Answer:
Alot of god dam rabbits
Explanation:
Answer:
million rabbits becauseeverything
PLZ EXPLAIN THE EQUATION AND I WILL GIVE BRAINLIST You are out and about in the country and your father sees a rock that he really wants in the yard. Now you must get the very heavy rock into the back of a truck. The truck bed is 3 feet off the ground. Your father pulls out a 5-foot plank and begins to set up a ramp. At the same time, you (who know about mechanical advantage!) have found a plank that is 8 feet long, and you show it to your father. Which plank will give you the most mechanical advantage? Calculate the MA for each plank
Answer:
The 8 foot long plank
Explanation: hope this helps :)
The diagram below shows the velocities of two runners.
11 m/s west
Runner 1
5 m/s east
Runner 2
From the frame of reference of runner 1, what is the velocity of runner 2?
O A. 5 m/s east
O B. 6 m/s east
C. 16 m/s west
O D. 16 m/s east
Answer : 16 m/s east
Explanation: Trust the process!!
From the frame of reference of runner 1, the velocity of runner 2 will be D) 16 m/s east
What is relative velocity ?
The relative velocity is defined as the velocity of an object with respect to another observer
When two bodies are moving in opposite directions , relative velocity get added and if bodies are moving in same direction , relative velocity will get subtracted .
From the frame of reference of runner 1, the velocity of runner 2 will be
v (relative) = v1 + v1
v1 = velocity of runner 1 = 11m/s west
v2 = velocity of runner 2 = 5m/s
v = 11 + 5 = 16 m/s
correct answer will be O D. 16 m/s east as runner 2 is running in east direction
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If a rock is found inside of another rock layer, then the rock inside must be younger than that layer surrounding it. Question 1 options: True False
Answer:
False.
Explanation:
The layer beneath the another rock will be older. The sequence will not matter in the layers of the rock. The layer inside will be older than the upper layer. This is called law of Superposition. Sedimentary rocks forms the youngest layer of the rocks.
What is the density of water?
gram/mL
(fill in the number)
Answer:
1.00 gram per milliliter (1 g/mL). In other words, 1 milliliter of water has a mass of 1 gram. A drop of water is 0.05 mL of water, so its mass would be 0.05 grams.
Explanation:
How can people stop being Homophobia? °∩°
Pretty long so read if you will:
I'm pretty late to this but oh well. Well to start why are people homophobic in the first place? You might not understand as well but that is because me and you are growing up at a time and place where people are encouraged to be themselves and we're embracing people that are different than what is considered normal. Gay marriage was legalized literally in the US in 2015, 5 years ago. I come from Malaysia, one of the few countries where it's illegal to be gay and can cause a death penalty from what I've seen. Obviously I grew up in a place where gay and whatnot were a joke and is wrong. But we moved and I came to the US and my beliefs changes, it also helped that I was literally only 11 so I was more easier to change than adults. Majority of the world honestly, are not as open to the lgbtq+ community as a person in America might think. The belief that it's only a women and men probably stems from the fact that it's how u make babies. And if we know anything, society doesn't like things that are different. To stop people being homophobic you have to stop people from spreading the belief that it's wrong to be gay or bi. This is going to be hard and people really overestimate the world when it comes to change. Peoples belief won't be changed so quick just, change doesn't happen quick. It's going to be a long time and maybe even never, look at racism. We all exist together for so long but there's still racism though much less compared to back then. As long as people stop teaching that next generation, us, that being lgbtq+ is bad, it will decrease but it will take a long time. And as much as I agree we need it to be now, it won't and trying to force something will only cause more backlash. Just try to inform the people around you and understand change does not happen fast, it's slow, especially if it you want it to be permanent.
What does "magnitude of the vector" mean?
Answer:
Explanation:
The magnitude of a vector is the length of the vector. The magnitude of the vector a is denoted as ∥a∥. See the introduction to vectors for more about the magnitude of a vector.
Formulas for the magnitude of vectors in two and three dimensions in terms of their coordinates are derived in this page. For a two-dimensional vector a=(a1,a2), the formula for its magnitude is
∥a∥=a21+a22‾‾‾‾‾‾‾√.
For a three-dimensional vector a=(a1,a2,a3), the formula for its magnitude is
∥a∥=a21+a22+a23‾‾‾‾‾‾‾‾‾‾‾‾√.
The formula for the magnitude of a vector can be generalized to arbitrary dimensions. For example, if a=(a1,a2,a3,a4) is a four-dimensional vector, the formula for its magnitude is
∥a∥=a21+a22+a23+a24‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾√.
Roberto has twice the mass his sister Mary has (see above) but runs at the same velocity as Mary. Will his kinetic energy be twice as much? Show your work. What happens to Roberto’s kinetic energy when he runs twice as fast?
Answer:
yes Robert's kinetic energy will be twice as much
if Robert runs twice as fast, then his KE will be 8 times Mary's KE
Explanation:
Kinetic energy KE = [tex]\frac{1}{2}[/tex]m[tex]v^{2}[/tex]
for Robert KE = [tex]\frac{1}{2}[/tex](2m)[tex]v^{2}[/tex] = m[tex]v^{2}[/tex]
for Mary KE = [tex]\frac{1}{2}[/tex]m[tex]v^{2}[/tex]
If you divide Robert KE by Mary KE = m[tex]v^{2}[/tex] / [tex]\frac{1}{2}[/tex]m[tex]v^{2}[/tex] = 2; yes Robert's kinetic energy will be twice as much
if Robert v is equal to 2v
for Robert KE = [tex]\frac{1}{2}[/tex](2m)[tex](2v)^{2}[/tex] = 4m[tex]v^{2}[/tex]
for Mary KE = [tex]\frac{1}{2}[/tex]m[tex]v^{2}[/tex]
If you divide Robert new KE by Mary's KE = 4m[tex]v^{2}[/tex] / [tex]\frac{1}{2}[/tex]m[tex]v^{2}[/tex] = 8, if Robert runs twice as fast, then his KE will be 8 times Mary's KE
Roberto has twice the mass his sister Mary has (see above) but runs at the same velocity as Mary, then his kinetic energy would be twice that of Mary, and the kinetic energy of Roberto would be 8 times when he runs twice as fast Mary.
What is mechanical energy?Mechanical energy is the combination of all the energy in motion represented by total kinetic energy and the total stored energy in the system which is represented by total potential energy.
The kinetic energy is the body depends on the mass as well as the speed of the object and is given by the mathematical expression as follows
K.E = 1/2 × m × v²
When Roberto runs at the same speed as his sister Mary but has twice Mary's mass (see above), Roberto's kinetic energy is twice Mary's, and it is eight times higher when Roberto runs twice as quickly as Mary.
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