The big bang theory or great expansion explains the formation of the universe from a point with very high density where matter and space were created, it can be observed in an experiment
The Big Bang theory that can be adapted with some home experiments, specifically the expansion can be measured using an experiment with inflating balloons.
Materials
deflated balloons
marker
thread
measuring tape
Description of the experiment
The stars or galaxies are marked repeatedly with an initial separation and this distance is measured by a thread the length and the thread with a meter, this is used as measured by the fact that the surface is curved.
The balloon is inflated and measurements of the separation are made, observing that as the volume of the balloon increases (time increase) the separation of the galaxies increases
The increase in distance is explained by the Big Bang theory or great expansion.
There is also astronomical evidence:
* The redshift of the hydrogen spectral lines that is explained by the Dopler effect, which is a move away from objects
* Background radiation in the microwave range that comes from everywhere and would be the residue of a large initial explosion.
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On a velocity vs. time graph, what does it mean when the line crosses over the x-axis?
On a velocity - time graph, if the line crosses the x - axis it depicts that the object has started moving in the opposite direction.
why frequency remains unchanged during reflection
Answer:
Although the wave slows down, its frequency remains the same, due to the fact that its wavelength is shorter. When waves travel from one medium to another the frequency never changes. As waves travel into the denser medium, they slow down and wavelength decreases.
Answer:
When waves travel from one medium to another the frequency never changes.
Explanation:
As waves travel into the denser medium, they slow down and wavelength decreases. Part of the wave travels faster for longer causing the wave to turn. The wave is slower but the wavelength is shorter meaning frequency remains the same.
Suzy drives 10 miles north then drives 24 miles west. What is her total distance traveled?
Answer:
34
Explanation:
calculate the frequency and time period of sound wave of 35 m wave length propagating at a speed of 3500m/s
Answer:
Frequency = 100 Hz
Time period = 0.01 sec
Explanation:
f= 3500/35 = 100
T = 1/f = .01
what objects has large volume and small mass
Answer:
A hot air balloon
what is the nature of a machine having more power
can do a lot of work
can do a small work
can work fast
works slowly
choose from the option
the nature of a machine having more power can work fast
What is a galaxy?
a. A star's death process
b. The birthplace of stars
C. A single star
d. A group of stars held together by gravity
Answer:
galaxy is a group of stars held together by gravity
Answer:
d
Explanation:
thats the defentios
hope this hepls
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A magnet has ___________ poles. Like poles__________each other and unlike poles __________. An electromagnet is used to separate large masses of___________ scrap. The strength of the magnetic is increased by inserting a _____________. In torch we use a ________ as the source of electricity. To light a table lamp and to run a refrigerator, We use ____________ as the source of electricity. A group or two or more cells is called a ___________ . _____________ pass electricity through them.
Answer:
2 repel attracts light water
Answer:
A magnet has two poles.
Like poles repel each other and unlike poles attract
An electromagnet is used to separate large masses of iron scrap.
The strength of the magnetic field of an electromagnet is increased by inserting a core of soft iron.
In a torch we use a dry cell as the source of electricity.
To light a table lamp and to run a refrigerator, we use mains as the source of electricity.
A group of two or more cells is called a battery.
Conductors pass electricity through them.
Part D
Now, switch over to the Large Ball Drop Tracker and observe the graphs of vertical displacement against time (y vs. t) and of vertical velocity
against time (vy vs. t) for the large ball, using the same process you did for the small ball. What can you say about the vertical displacement and
velocity of the large ball?
Answer: I didn't see a difference because the large ball's vertical displacement and velocity are the same as the small one's.
Explanation:
WILL GIVE BRAINLIEST If a neutron’s relative mass is listed as 1, what would be the relative mass of a proton and an electron?
A student walks to the right, 25-m along the C Hall in 15-s. They turn around and walk 15-m to the left in 8.0-s. What is the average speed and the average velocity? (V represents average speed and ΔV represents average velocity)
For the student that walks to the right 25 m in 15 s and then turns and walks to the left 15 m in 8.0 s, we have:
1. The average speed is 1.74 m.
2. The average velocity is 1.42 m.
1. The average speed is an scalar wich is given by:
[tex] V = \frac{d_{t}}{t_{t}} [/tex]
Where:
[tex]d_{t}[/tex]: is the total distance
[tex]t_{t}[/tex]: is the total time
The total distance and the total time can be calculated as follows:
[tex]d_{t} = d_{1} + d_{2} = 25 m + 15 m = 40 m [/tex]
[tex] t_{t} = t_{1} + t_{2} = 15 s + 8.0 s = 23 s [/tex]
Since V is a scalar, the direction of motion is not important to calculate the final value.
Then, the average speed is:
[tex] V = \frac{d_{t}}{t_{t}} =\frac{40 m}{23 s} = 1.74 m/s [/tex]
2. The average velocity is a vector, so the direction of motion is important here. This ΔV can be calculated with the following equation:
[tex] \Delta V = \frac{\Delta x}{\Delta t} = \frac{x_{f} - x_{i}}{t_{f} - t_{i}} [/tex]
Where:
x: is the displacement
f: is for final and i: is for initial
Hence, the average velocity is:
[tex] \Delta V = \frac{x_{f} - x_{i}}{t_{f} - t_{i}} = \frac{15 m - 25 m}{8.0 s - 15 s} = 1.42 m/s [/tex]
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Why do we use sharp pointed needle while stiching cloths ? physic
Answer:
Explanation:
A blunt needle won't get the job done as it won't pass through the fabric well
Hanging from a tree branch is doing work?
Explanation:
The branch is possessing gravitational potential energy.
The digital payment system that enables sellers to accept payment at trade
shows, food trucks, concerts, or farm stalls is called a:
A. biometric authentication system.
O B. QR code.
O c. payment protection device.
D. mobile point-of-sale device.
SUBMIT
[tex] \large \mathfrak{Answer : }[/tex]
The Correct option is D. mobile point-of- sale device.
The digital payment system that enables sellers to accept payment at trade shows, food trucks, concerts, or farm stalls is called a mobile point-of-sale device. Thus, the correct option for this question is D.
What are the advantages of a digital payment system?The advantages of a digital payment system are as follows:
This type of payment system is cost and time-saving.It increases sales by reducing transaction costs.It is helpful in generating the invoice at any time.This mode of payment is paperless.The mobile point-of-sale device (mPOS) is cost-effective. It involves the breaking down of monthly maintenance and payments on the basis of a cloud-based subscription. It authorizes the sellers to accept the payment at trade. It is one of the fastest modes of payment.
Therefore, a mobile point-of-sale device is a digital payment system that enables sellers to accept payment at trade shows, food trucks, concerts, or farm stalls. Thus, the correct option for this question is D.
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sebuah titik p berjarak 2m dari muatan sebesar 5×10⁷c. besar potensial titik p adalah
Answer:
Explanation:
V=k*q/r
V= (9*10⁹) * 5*10⁷/2
V = 9*10⁹ * 25*10⁶
V = 225*10¹⁵
A block of wood has A mass of 200g give the mass in kg showing long conversion
Conversion of mass from grams into kg :
[tex]1kg = 1000g[/tex][tex]1g = \dfrac{1}{1000} \: kg[/tex][tex]200g = \dfrac{200}{1000} \: kg[/tex][tex]200g = 0.2kg[/tex]what are 2 ways elastic energy affects us as humans
Answer:
The coil spring of a wind-up clock.
An archer's stretched bow.
Explanation:
Comparing descriptive and experimental research?
It is normal to feel a sharp pain or pop when lifting heavy weights. Question 5 options: True False
Answer:false
Explanation:because it means you're pushing yourself too much and you need to use smaller weights
(d) What type of transformation is done by the following things?
(i) electrical lamp
(ii) electric fan
(iii) battery operated radio
(iv) kerosene lamp
(v) human body
(vi) car
Answer:
human body is answer according to our studies
A dog runs 20 m east and then 35 m west in 12 seconds.
What is the dog speed? What is the dogs velocity?
Answer: Dog's speed = (20 + 35) /12 = 4.583 m/s
Dog's velocity = (20-35)/12 = -1.25 m/s
Explanation: Speed is a scalar quantity so we don't care about direction which means we add the magnitude of both the directions i.e. east and west.
About the velocity, it's a vector quantity. So, we must be very careful with the directions and signs. In cartesian coordinates system, we generally take the right side of origin as the positive x-axis and the left side of origin as the negative x-axis. So, considering the same fact, we consider east as positive side and west as the negative side.
Therefore, when we add 20m + (-35m), we get = -15m and you already have the time period of 12 s.
I need help answering this question. Thanks!
Answer:
459.195 (N).
Explanation:
in order to calculate the required value of the Fₓ:
Fₓ=F*cos(37°); Fₓ=575*0.7986≈459.195 (N).
For more info see the attachment (note, the required force Fₓ is marked with red colour).
Can a resultant forces' direction be north or south, or is it only East and West?
A mouse runs 5 m north across the floor before hearing a cat. Then it runs back south along the same path for 1 mand turns west to run under a sofa 3 m away.
What is the displacement of the mouse and the total distance it ran?
a. The mouse's displacement is 5 m southwest and it ran 9 m.
b. The mouse's displacement is 5 m northwest and it ran 9m
c. The mouse's displacement is 9 m and it ran 5 m.
d. The mouse's displacement is om and it ran 9 m.
The displacement of the mouse is 5m and the total distance is 9m.
The given parameters;
initial displacement of the mouse = 5 m north
second displacement = 1 m South
third displacement = 3 m west
To find:
the displacement of the mouse and the total distance it ranDisplacement is the change in the final position and the initial position of an object.
Distance is the total path covered by the object.
When the mouse was at 1 m south, the displacement = 5 m - 1m = 4m
The displacement of the mouse between 4m south and 3m west is calculated by using Pythagoras theorem.
[tex](displacement)^2 = 3^2 + 4^2\\\\(displacement)^2 = 25\\\\displacement = \sqrt{25} \\\\displacement = 5 \ m[/tex]
The total distance of the mouse = 5 m + 1m + 3m = 9m
Thus, the displacement of the mouse is 5m and the total distance is 9m.
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3. ¿Cuál es la distancia focal de un espejo CONVERo sabiendo que un objeto colocado
a 4 cm de él da una imagen virtual situata a 2 cm del espeso? ¿Cuál es el radio de
curvatura del espejo? Determina también las características de la imagen sie
objeto mide 5 cm
i dont know for real
What is the value of G on earth and moon?
We have that The acceleration due to gravity on the Moon And
The acceleration due to gravity on the surface of the Earth is approximately
[tex]1.625 m/s^2[/tex]
[tex]9.81 m/s^2,[/tex]
From the Question we are asked
The value of G on earth and moon?
Where G refers to The acceleration due to gravity
Generally
The acceleration due to gravity on the Moon is approximately
[tex]1.625 m/s^2,[/tex]
And
The acceleration due to gravity on the surface of the Moon is approximately
[tex]9.81 m/s^2,[/tex]
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Sketch a velocity vs. time graph of a car accelerating in the positive direction. What is the slope of a velocity vs. time graph equal to?
Answer:
Acceleration
Explanation:
Let me teach u a trick, most teachers loves to tell students to memorize what the slope means, and what does the area below the graph mean, and i think this is bs
So how u do it is this
Now it is a velocity vs time
Now to find the slope u would take
Velocity / time
Now what is the unit for velocity? m/s
What is the unit for time? s
Therefore since u know to find the slope u use
Velocity divide by time
So just take the unit of velocity divide the unit of time and see what unit u get
m/s ÷s
m/s x 1/s
= m/s^2
What unit is this?
This is the unit for acceleration
This trick works for every graph u see, and let me show u an extra bonus one
Now u are velocity vs time graph
Now if they ask u what does the area below graph means?
So u know area is just height x length, in other words y axis × x axis
So it means velocity x time
Therefore what would u get? Same trick
m/s x s
= m
What is m? m is meter, and this stands for displacement
100 points 100 points! Answer correctly please I need a good grade!!!!! Brainiest for correct answer!
Answer:
2.2
Explanation:
It then pauses before flying with an average velocity of 6.8 m/s east for 3.5 s to another branch.
Answer:
9 m/s
Explanation:
The seagull flew at a constant velocity for a total of 32 seconds.
One-quarter of 32 is:
[tex]\implies \dfrac{1}{4} \times 32=\dfrac{32}{4}=8\; \sf seconds[/tex]
Therefore, if the seagull flew 72 meters in one-quarter of 32 seconds, it flew 72 meters in 8 seconds.
[tex]\boxed{\sf Speed=\dfrac{Distance}{Time}}[/tex]
To find the velocity (speed) of the seagull, substitute the distance and time into the formula:
[tex]\implies \sf Velocity=\dfrac{72}{8}=9\; \sf m/s[/tex]
Complete the chart. All measurements are good to 1°C or better,
°C
K
°F
1.
0°C
2.
212°F
3.
450 K
4.
98.6°F
5.
-273°C
6.
294 K
7.
77°F
8.
225 K
9.
-40°C
12
© Carson-Dellosa . CD-1
T he relationships between the systems of units of temperarua can be completed in the table
K = ºC +273
ºF = 9/5 ºC + 32
Systems of units are systems that arbitrarily define which are the fundamental units of measurement. The most widely used system worldwide is the International Measurement (SI) where the basic units are: Length, mass, time, absolute temperature, current, amount of substance and light intensity, all other units are derived from these.
But there are still in the world several practical systems that are used, among them the temperature measurement is one of the measurements that has more practical systems, for example the centrifugal and fahrenheit degrees are extremely used.
The relations to pass between systems of units of temperature we have;
K = ºC +273
ºF = 9/5 ºC + 32
With these expressions we can make the changes of units
1) T = 0ºC
K = 0 + 273
K = 273 K
ºF = 9/5 0 + 32
ºF = 32º F
2) T = 212ºF
ºC = 5/9 (ºF-32)
ºC = 5/9 (212 - 32)
ºC = 100ºC
K = 100 + 273
K = 373
3) T = 450 K
ºC = K - 273
ºC = 450-273
ºC = 177ºC
ºF = 9/5 177 +32
ºF = 350.6ºF
4) T = 98.6ºF
ºC = 5/9 (98.6 - 32)
ºC = 37ºC
K = 37 +273
K = 310K
5) T = -273ºC
K = -273 +273
K = 0
ºF = 9/5 (-273) + 32
ºF = 523.4ºF
6) T = 294K
ºC = 294 -273
ºC = 21ºC
ºF = 9/5 21 + 32
ºF = 69.8ºF
7) T = 77ºF
ºC = 5/9 (77 -32)
ºC = 25ºC
K = 25 + 273
8) T = 225K
K = 298K
° C = 225 - 273
ºC = -48ºC
ºF = 9/5 (-48) + 32
ºF = -54.4ºF
With the equivalences between sysems of units, units can be converted from one system to another.
Be careful since some of the equation is of physics, the temperature must be in absolute units or in degrees kelvin.
In conclusion, with the relationships between the systems of temperature units, the table can be completed
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Answer:
b=t-p(m-n)/s
Explanation:
