Answer:
Explanation:
I'll do this in both meters and feet, since you don't specify which you need. Since we are only dealing in the y-dimension:
Δx = ???
a = -9.8 m/s/s
v₀ = 0
t = 16 sec
In the equation:
Δx = v₀t + [tex]\frac{1}{2}at^2[/tex] we fill in accordingly:
Δx = [tex]0(16)+\frac{1}{2}(-9.8)(16)^2[/tex] which simplifies to
Δx = [tex]\frac{1}{2}(-9.8)(256)[/tex] so
Δx = -1300 m. Now in feet, it's the same equation but the acceleration is -32 ft/s/s:
Δx = [tex]\frac{1}{2}(-32)(256)[/tex] which is
Δx = -4100 ft (the negative signs here just indicate direction: the penny is this distance below the point from which it was dropped. So, obviously, to answer the question regarding the height of the building, you would say it was 1300 m high or 4100 feet high. The negative would be significant if we were asked instead "How far did the penny fall?" which would be the same answer to a slightly different question.)
A resistor of 500Ω and one of 2000Ω are placed in series with a 60V supply. What will be the reading on a voltmeter of internal resistance 2000Ω when placed across (i) 500Ω resistor and (ii) 2000Ω resistor?
Answer: 10 V, 40 V
Explanation:
Given
Resistors are [tex]500\Omega[/tex] and [tex]2000\Omega[/tex]
Power supply [tex]V=60\ V[/tex]
Voltmeter internal resistance [tex]r=2000\ \Omega[/tex]
When it connected around [tex]500\Omega[/tex] resistance, effective resistance becomes
[tex]\Rightarrow \dfrac{1}{R}=\dfrac{1}{500}+\dfrac{1}{2000}\\\\\Rightarrow R=\dfrac{2000}{5}\\\\\Rightarrow R=400\ \Omega[/tex]
Total resistance in series [tex]R_{net}=2400\ \Omega[/tex]
Current in circuit
[tex]I=\dfrac{60}{2400}=\dfrac{1}{40}\ A[/tex]
Voltage around [tex]500\Omega[/tex] resistance is
[tex]V=\dfrac{1}{40}\times 400\\\\V=10\ V[/tex]
(B) when voltmeter is connected around [tex]2000\Omega[/tex] resistor
Net resistance around it
[tex]\Rightarrow \dfrac{1}{R}=\dfrac{1}{2000}+\dfrac{1}{2000}\\\\\Rightarrow R=1000\ \Omega[/tex]
Total resistance [tex]R_{net}=1500\ \Omega[/tex]
Current in circuit
[tex]I=\dfrac{60}{1500}=\dfrac{1}{25}\ A[/tex]
Voltage around [tex]2000\Omega[/tex] resistor
[tex]V=\dfrac{1}{25}\times 1000\\\\V=40\ V[/tex]
¡¡¡AYUDA CON ESTOS EJERCICIOS DE FÍSICA!!!
1. ¿Cuál es el valor del potencial eléctrico en un punto si para trasladar una carga de 5 μC desde el suelo hasta el, se realizó un trabajo de 40 X 10^(-6) J?
2. ¿Calcular el potencial eléctrico en un punto B que se encuentra a 50 cm de una carga positiva q = 8 X 10^(-6) C
3. Determina el valor de una carga transportada desde un punto a otro, al realizarse un trabajo de 8 x 10^(-5) J, si la diferencia de potencial es de 4 x 10^3 V.
Answer:
(a) 8 V, (b) 144000 V, (c) 2 x 10^(-8) C
Explanation:
(a) charge, q = 5 μC , Work, W = 40 x 10-^(-6) J
The electric potential is given by
W = q V
[tex]40\times10^{-6}=5 \times10^{-6}\times V\\\\V = 8 V[/tex]
(b)
charge, q = 8 x 10^(-6) C, distance, r = 50 cm = 0.5 m
Let the potential is V.
[tex]V =\frac{k q}{r}\\\\V =\frac{9\times 10^{9}\times 8\times 10^{-6}}{0.5}\\\\V =144000 V[/tex]
(c)
Work, W = 8 x 10^(-5) J, Potential difference, V = 4000 V
Let the charge is q.
W= q V
[tex]8\times10^{-5}= q\times 4000\\\\q =2\times 10^{-8} C[/tex]
What is the momentum, in kg m/s, of a tyre of mass 6 kg rolling along at a velocity of 3m/s?
Answer:
p = 18 kg-m/s
Explanation:
Given that,
The mass of tyre, m = 6 kg
The velocity of the tyre, v = 3 m/s
We need to find the momentum of the tyre. We know that, the momentum of an object is equal to the product of mass and velocity. SO,
p = mv
[tex]p=6\ kg\times 3\ m/s\\\\=18\ kg-m/s[/tex]
So, the momentum of the tyre is equal to 18 kg-m/s.
#2 Most of Earth's weather takes place in the O troposphere O stratosphere O mesosphere thermosphere
Answer:
troposphere
hope this helps
have a good day :)
Explanation:
A person notices water waves on the surface of the pond. 18 waves pass by a person in 12 seconds. Calculate the frequency of these water waves. Give the unit.
Answer:
f = 1.5 Hz
Explanation:
Given that,
18 waves pass by a person in 12 seconds.
We need to find the frequency of these water waves.
We know that,
Frequency = no. of waves per second
So,
[tex]f=\dfrac{18}{12}\\\\f=1.5\ Hz[/tex]
So, the frequency of these water waves is equal to 1.5 Hz.
A sound wave has a frequency of 192 Hz and travels the length of a football field at a speed of 338.5 m/s. what is the wavelength of the wave?
Explanation:
everything can be found in the picture
Suggest one material that is used to make the trampoline surface.
Explain your answer.
Answer:
Polypropylene is the safest material for trampoline mats in the trampoline market. The fibers are heavily woven to make a buoyantly webbed fabric. The fabric is then thermally interlocked to provide a smoother stabilized surface that can withstand constant flexing and stress.
A train moves from rest to a speed of 25 m/s in 30.0 seconds. What is its acceleration?
Please provide the formula and the working
Answer:
Explanation:
The equation for acceleration is
[tex]a=\frac{v_f-v_0}{t}[/tex] where vf is the final velocity and v0 is the initial velocity. For us, the final velocity is 25 m/s and the initial is 0 because the train started from resting position. Filling in and solving for a:
[tex]a=\frac{25-0}{30.0}[/tex] so
a = .83 m/s/s
does anyone have the full report for newtons second law lab?
Answer:
Explanation:
Newton's Second Law Lab. 10/12/2012
Analysis of Error: Some sources of error that could have affected the acceleration are un-precise tools,friction, air resistance, air coming from the air conditioner, and mass of the string. These factors were not taken into consideration and could have affected the acceleration.
It is said that people often behave in unusual ways during a full moon. a)
Calculate the gravitational force that the moon would exert on a 50.0 kg
student in your physics class. The Moon is 3.84 x 108 m away from Earth
and has a mass of 7.35 x 1022 kg.
Answer: baby moon gravity
Sorry I dont know how to do it :/
Explanation:
moon + gravity = baby moon gravity
If a fuse melts, does it create an open circuit, a closed circuit, or a short circuit?
Answer:
short circuit
someone pls help fast
what is matter explain verifly
Answer:
Matter is a substance that has inertia and occupies physical space. According to modern physics, matter consists of various types of particles, each with mass and size.Matter can exist in several states, also called phases. The three most common states are known as solid, liquid and gas.Matter is the Stuff Around You or Atoms and compounds are all made of very small parts of matter. Those atoms go on to build the things you see and touch every day. Matter is defined as anything that has mass and takes up space (it has volume).Solid ice, water and steam are few examples of matter touched in everyday life. Subatomic particles are also considered as matter.
Answer:
Matter is everything around you. Atoms and compounds are all made of very small parts of matter. Those atoms go on to build the things you see and touch every day. Matter is defined as anything that has mass and takes up space (it has volume).
hope it helps...
A pool ball moving 1.33 m/s strikes an identical ball at rest. Afterward, the first ball moves 0.750 m/s at a 33.30 angle. What is the velocity of the other ball?
Explanation:
We need to apply the conservation law of linear momentum to two dimensions:
Let [tex]p_{1}[/tex] = momentum of the 1st ball
[tex]p_{2}[/tex] = momentum of the 2nd ball
In the x-axis, the conservation law can be written as
[tex](p_{1} \cos \theta_{1})_{i} + (p_{2} \cos \theta_{2})_{i} = (p_{1} \cos \theta_{1})_{f} + (p_{2} \cos \theta_{2})_{f} [/tex]
or
[tex](m_{1}v_{1})_{i}= (m_{1}v_{1}\cos \theta_{1})_{f} + (m_{2}v_{2}\cos \theta_{2})_{f} [/tex]
Since we are dealing with identical balls, all the m terms cancel out so we are left with
[tex](v_{1})_{i} = (v_{1})_{f}\cos \theta_{1} + (v_{2})_{f}\cos \theta_{2}[/tex]
Putting in the numbers, we get
[tex]1.33 = (0.750) \cos(33.30) + (v_{2})_{f} \cos \theta_{2}[/tex]
[tex] = > (v_{2})_{f} \cos \theta_{2} = 0.703[/tex]
In the y-axis, there is no initial y-component of the momentum before the collision so we can write
[tex]0 = (v_{1}\sin \theta_{1})_{f} + (v_{2}\sin \theta_{2})_{f} [/tex]
or
[tex] = > (v_{2})_{f} \sin \theta_{2} = (0.750) \sin(33.30) = 0.412[/tex]
Taking the ratio of the sine equation to the cosine equation, we get
[tex] \frac{ \sin \theta _{2}}{ \cos \theta_{2} } = \tan \theta_{2} = \frac{0.412}{0.703} = 0.586[/tex]
or
[tex] \theta_{2} = { \tan}^{ - 1} (0.586) = 30.4[/tex]
Solving now for [tex](v_{2})_{f}[/tex],
[tex](v_{2})_{f} = \frac{0.412}{ \sin(30.4) } = 0.815 \: \frac{m}{s} [/tex]
The X and Y components of a vector are described in the image below. Which of the following will be accurate when solving for the magnitude and direction of the vector.
I NEED AN ANSWER RIGHT NOW PLEASE
volume of CO2 at STP of 27.0 g
Answer:
Volume of CO2 at STP = 13.8 liter (Approx.)
Explanation:
Given:
Mass of CO2 = 27 gram
Find:
Volume of CO2 at STP
Computation;
We know that;
At STP, Volume of 1 mol of gas = 22.4 liter
Molar mass of CO2 = 44 g/mole
So,
Volume of CO2 at STP = [Mass of CO2 / Molar mass of CO2 ][22.4]
Volume of CO2 at STP = [27/44][22.4]
Volume of CO2 at STP = [0.6136][22.4]
Volume of CO2 at STP = 13.8 liter (Approx.)
The velocity time graph of a body is given below. Find the distance travelled by the body from A to B. *
Answer:
100m
Explanation:
10 x 10 = 100m
area of velocity time graphs gives displacement.
im not sure if the distance is the same.
what is the frequency range of Audible sound
Answer:20Hz to 20000Hz
Explanation:
Humans can detect sounds in a frequency range from about 20 Hz to 20 kHz.
Which of the following nuclear configurations is most stable?
Answer:
D. A nucleus of 2 protons and 2 neutrons.
Explanation:
A stable nucleus is one that do not disintegrate naturally, majorly due to the even number of its protons and neutrons. Thus they are not radioactive in nature.
From the given question, it would be observed that a nucleus of 2 protons and 2 neutrons would give a helium atom. And this is a stable atoms due to the magnetic number of the components of its nucleus.
Thus, the nuclear configuration that is most stable out of the given options is a nucleus of 2 protons and 2 neutrons. Option D.
Which statement explains why a red rose does not appear to be orange?
O A. Orange light is absorbed by the rose.
B. Red light is transmitted through the rose.
C. Orange light is transmitted through the rose.
O D. Red light is absorbed by the rose.
Answer:
A
Explanation:
you see red because it's reflected and other colors are absorbed, light transmitted through something is when it travels through something like glass or a gem
calcula el peso de un perro cuya masa es de 25 kg en la tierra
Answer:
El peso = 245 Newton
Explanation:
Dados los siguientes datos;
Masa = 25 kg
Para encontrar el peso del perro en la tierra;
El peso se puede definir como la fuerza que actúa sobre un cuerpo o un objeto como resultado de la gravedad.
Matemáticamente, el peso de un objeto viene dado por la fórmula;
[tex] El \; peso = mg [/tex]
Dónde;
m es la masa del objeto.
g es la aceleración debida a la gravedad.
Sabemos que la aceleración debida a la gravedad es igual a 9,8 m / s² en el planeta Tierra.
Sustituyendo en la ecuación, tenemos;
[tex] W = 25 * 9.8[/tex]
El peso = 245 Newton
What is surface tension
Answer:
Surface tension is a fundamental property of the surface of liquid. Surface tension is responsible for the curvature of the surfaces of air and liquids. Surface tension is responsible for the ability of some solid objects to “float” on the surface of a liquid.
hope it helps
stay safe healthy and happy.Surface tension is the tendency of liquid surfaces at rest to shrink into the minimum surface area possible.Surface tension is what allows any object that is denser than water to float on water
hope this will help out
100 point!! Question song!
You gotta keep 'em separated
Like the latest fashion
Like a spreading disease
The kids are strappin' on their way to the classroom
Getting weapons with the greatest of ease
The gangs stake their own campus locale
And if they catch you slippin' then it's all over pal
If one guys colors and the others don't mix
They're gonna bash it up
Hey - man you talkin' back to me?
Take him out
You gotta keep 'em separated
Hey - man you disrespecting me?
Take him out
You gotta keep 'em separated
Hey they don't pay no mind
If you're under 18 you won't be doing any time
Hey, come out and play
By the time you hear the siren
It's already too late
One goes to the morgue and the other to jail
One guy's wasted and the other's a waste
It goes down the same as the thousand before
No one's getting smarter
No one's learning the score
Your never ending spree of death and violence and hate
Is gonna tie your own rope
Hey - man you disrespecting to me?
Take him out
You gotta keep 'em separated
Hey - man you talking back to me?
Take him out
You gotta keep 'em separated
Hey they don't pay no mind
If you're under 18 you won't be doing any time
Hey, come out and play
It goes down the same as the thousand before
No one's getting smarter
No one's learning the score
Your never ending spree of death and violence and hate
Is gonna tie your own rope
Hey - man you talkin' back to me?
Take him out
You gotta keep 'em separated
Hey - man you disrespecting me?
Take him out
You gotta keep 'em separated
Hey they don't pay no mind
If you're under 18 you won't be doing any time
Hey, come out and play
Answer:
It is a song called Come out and Play. It is released on 1994 in a Album called Smash. It comes under Punk-Rock.
I hope i answered your Question.
Answer:
Explanation:
Adding to the other answer, this song is about violence in streets and schools among young people involved in gangs; how they have little hope for their future. Band member Dexter got idea to make the song while he was in college.
Find new resistance of wire if it is stretched to twice its
original length. Original resistance was 20 ohm. Also how its
resistivity will change
Answer:
Original Length = L1
Stretched length =L2
From
R = pl/A
R=Resistance
p=Resistivity
A=Cross-sectional Area
l= length of wire
We can see that Resistance is directly Proportional to Length... Meaning that Resistance Increases also as Length increases.
R1/L1 = R2/L2
From the question... The key to note is this sentence
"The Stretched length is TWICE the Original Length"
Meaning
L2 = 2L1 (So replace L2 as 2L1 when solving)
R1=20ohms
Let R2 = k
Applying the formula
20/L1 = k/2L1
kL1 = 20x 2 L1
KL1 = 40L1
L1 cancels on both sides
k=40ohms.
So As the length doubled... The Resistance did too
from 20ohms to 40ohms
Which is not true of friction? A. Causes wear and tear of the surfaces B. Helps us to fall easily on roads C. Produces heat D. Produces light E. Stops bodies when they move over each other.
Answer:
B.
Hope this helps
A hypothesis is a(n) ______________, while a theory is a(n) ______________.
The table represents the speed of a car in a northern direction over several seconds. Column 1 would be on the x-axis, and Column 2 would be on the y-axis. Which best lists the titles of each column? Column 1 0 2 4. 6 8 10 Column 2 5 10 15 20 25 30 Column 1 should be titled "Time," and Column 2 should be titled "Velocity." Column 1 should be titled "Velocity," and Column 2 should be titled "Time." Column 1 should be titled "Time," and Column 2 should be titled "Acceleration." O Column 1 should be titled "Acceleration," and Column 2 should be titled "Time."
Answer:
Explanation:
Since we are looking at speed over a time unit, we have an acceleration graph. The definition of acceleration mathematically is:
[tex]a=\frac{v_f-v_0}{t}[/tex] (that's the change in velocity over the change in time). The slope of any line in this graph wil represent the acceleration. Slope is rise over run, or y over x. Therefore, if acceleration is velocity over time, then the y axis is the velocity axis and the x axis is the time axis. It makes perfect, beautiful sense!!
E
Question 14/36
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A wave has a frequency of 30 Hz and a wavelength of 10 m. What's its speed?
Answer:
Speed = 300 m/s
Explanation:
Given the following data;
Frequency = 30 Hz
Wavelength = 10 m
To find the speed of the wave;
Mathematically, the speed of a wave is given by the formula:
[tex] Speed = wavelength * frequency [/tex]
Substituting into the formula, we have;
[tex] Speed = 10 * 30 [/tex]
Speed = 300 m/s
Which of the following would require a centripetal force?
A) All of these require a centripetal acceleration
B) An airplane slowing down
C) A train speeding up
D) A car turning right
Air pollution is an example of a. The underground economy. B. An external shock. C. A nonmarket activity. D. A negative externality.
Answer:
D. A negative externality.
Explanation:
Particulate pollution is a form of pollution that is responsible for the degradation of the environment.
Particulate matter is also referred to as particle pollution or atmospheric aerosol particles and it can be defined as a complex microscopic mixture of liquid droplets and solid particles that are suspended in air.
An externality is typically an unwarranted cost or benefit by a manufacturer or producer of goods and services that affects a third party.
In Economics, an externality could either be positive or negative depending on its effect on a third party.
A negative externality arises when the production or consumption of a finished product or service has negative impact (cost) on a third party.
In conclusion, air pollution is an example of a negative externality because it causes harm to a third party.
