Answer:
The speed is 4m/s because the size is the same.
Explanation:
The speed of the second ball after the collision is 4 m/s.
What is law of conservation of momentum?According to the law of conservation of momentum, The overall momentum of two or more bodies acting on one another in an isolated system stays constant unless an external force is introduced. As a result, momentum cannot be gained or lost.
Let the mass of each billiard ball is m.
Before collision speed of first billiard ball: u = 4 m/s.
Before collision speed of second billiard ball: U= 0 m/s.
After collision speed of first billiard ball: v = 0 m/s.
After collision speed of second billiard ball: V= ?
From conservation of momentum, we can write:
Total momentum before collision = Total momentum after collision
mu +M.0 = m.0 + m.V
u = V
V = 4 m/s.
The speed of the second ball after the collision is 4 m/s.
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Which is the best example of decreasing entropy?
O A box of nails is left in the rain and the nails rust over time.
O A pile of dirt on a floor is cleaned up with a broom.
O Apuddle of water is exposed to the sun and evaporates.
O A tree in a forest grows naturally over 10 years.
Answer:
B. A pile of dirt on the floor is cleaned up with a broom.
Explanation:
An increasing entropy is something that is left to be, like the other answers. decreasing entropy is disrupted usually by a person or something living.
When the pile of dirt on a floor is cleaned up with a broom, the molecular weight of the dirt present on the floor will decrease resulting in a decreased entropy.
Entropy is the measure of the degree of disorderliness of a system. It entails the randomness of a system.
Entropy of a system increases with increase in temperature and molecular weight of the compound.Entropy can also increase when the pressure of the system is reduced.A decrease in entropy would mean an increase in pressure, or a decrease in molecular weight or temperature.
Thus, considering the given options, only option B will result in a decreased molecular weight. When the pile of dirt on a floor is cleaned up with a broom, the molecular weight of the dirt present on the floor will decrease resulting in a decreased entropy.
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What causes wind?
A
The sun stops the wind throughout the afternoon as everything warms up.
B
The sun causes waves to be larger by directing solar energy into the water.
C
The sun heats land quickly and as the warm air rises, cool air comes in to take it place.
D
The sun reflects off the water, making the air above the water unstable and more likely to move.
Answer:C
Explanation:
The sun heats land quickly and as the warm air rises, cool air comes in to take it place.
Answer:
C
Explanation:
Which of the following is an example of the Doppler effect? (2 points)
A. A water bug on the surface of a pond is producing small ripples in the water. The bug is not moving
B. A police car with its siren on is driving towards you, and you perceive the pitch of the siren to increase.
C. Scientists measure the speed of light and find that it is constant.
D. The gravitational pull of two objects on each other
Answer: B
Explanation:
Your'e asking about how waves get closer and louder A it isn't moving so no, C it's not saying if it's near or not and D is going trough another procedure so that leaves B behind
shower thoughts...
if two people on each side of the world drop a piece of bread, the earth briefly becomes a sandwich....
Answer:
in your mind yes but the bread is smaller than the earth thus it wouldnt turn the earth into a sandwich.
please help !!!!! I’ll give brainliest !
Answer:
Honestly for me it's a bit too blurry. Sorry luv.:(
Explanation:
Describe the effect of speed on voltage
Answer:
Speed has no effect on voltage.
Explanation:
The voltage of the battery in your car is always 12 to 13.5 volts. It makes no difference whether the car is home in the garage or zooming down the interstate.
the strongly blown ballon gets blasted why?
Answer:
Because of pressure.
Thanks
Explanation:
The pressure bursts out the balloo
Explain how scientist learned about the magnetic poles of the Earth.
Answer:
there are many way but this may help
Explanation:
The tendency of a magnet to align itself in a north-south direction, so giving a magnetic compass, was discovered by the Chinese about 2000 years ago. Then in 1600 William Gilbert published De Magnete, in which he concluded that the earth behaved as a giant magnet. ...
When electrons are moving freely between many positive ions, what type of bond is occuring?
a
metallic
b
ionic
c
covalent
d
crystalline
Answer:
a metallic
Explanation:
Metal atoms are joined together by metallic bonds. Metals can form cations (positive ions) with a sea of delocalized electrons.
The atomic number tells us the...
Number of protons
Atomic mass
Number of electrons
Number of neutrons
Please help, I'm marking the person with the correct answer Brainliest!
I am giving 20 points!
Answer:
The atomic number tells us the number of protons.
Explanation:
Hope this helps and I hope u have an Amazing day!!
why is thouching the live wire of an appliane when it is connecfed to the mains dangerous
Answer: The live wire is the most dangerous one, since it is at 230 V. it should never touch the earth wire (unless the insulation is between them, of course!), because this would make a complete circuit from your mains supply to the ground (earth). A shock or fire would be highly likely.
Explanation:
What is the mass of a crate if a net force of 12 N gives the crate an acceleration of 0.20 m/s2?
A6 kg bag of rice is on the top shelf at a grocery store.
The height of the shelf is 2 meters.
What is the rice bag's gravitational potential energy?
Answer:
117.6 JExplanation:
The gravitational potential energy of a body can be found by using the formula
GPE = mgh
where
m is the mass
h is the height
g is the acceleration due to gravity which is 9.8 m/s²
From the question we have
GPE = 6 × 9.8 × 2
We have the final answer as
117.6 JHope this helps you
Answer:
b
Explanation:
A 40.0-kg package on a the roller belt conveyor is moving at 0.600 m/s. What is
its kinetic energy? *
O 7.2 J
O 12 J
O 14.4 J
O 0J
O24J
Answer:
7.2 JExplanation:
The kinetic energy of an object can be found by using the formula
[tex]k = \frac{1}{2} m {v}^{2} \\ [/tex]
m is the mass
v is the velocity
From the question we have
[tex]k = \frac{1}{2} \times 40 \times {0.6}^{2} \\ = 20 \times 0.36 \\ = 7.2[/tex]
We have the final answer as
7.2 JHope this helps you
Select the correct answer.
Which two factors does the power of a machine depend on?
Α. work and distance
B. force and distance
C. work and time
D. time and distance
Answer: C. work and time
Explanation: hope this helps
3. Riddle:
I am black when you buy me, red when you use me and grey when you throw me away.
What am I?
Answer:
The answer is charcoal
Answer:
Charcoal
Explanation:
Studying neutrinos helped to explain how our Sun works but led to changes in theories of particle physics, how is this process consistent with the scientific process? How can details about a theory be adjusted without undermining other discoveries made through the theory's predictions?
Explanation:
Yes, evidently, the process is consistent with the scientific process because in scientific process falsification and modification are two very important traits. So this new concept have modified the existing theories.
Through the modification a theory is adjusted without undermining other discovering made through the theory's prediction.
There are many other evidences that prove this fact for example Einstien's Theory of relativity also changes the existing concepts.
A person runs 3km north. One hour later, she runs 3km south, which of the following statements describes the persons complete trip
The person's complete trip was a 6km round trip because they traveled 3km north and then 3km south, returning to their original location.
What is trip?A trip is a journey or excursion to some destination, usually for a specific purpose. It can be as short as a day trip or as long as a round-the-world adventure. A trip typically involves travel by foot, car, railroad, boat, or airplane and often involves multiple destinations. It may also involve activities such as camping, hiking, sightseeing, and other leisure activities. Travelers usually plan trips in advance to ensure they have enough time to see and do the things they want to. Trips can also be spontaneous, with travelers deciding on the fly where to go and what to do.
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A man has a mass of 85 kg. What is his weight?
he weights 187.393 pounds
Answer:833N
Explanation: A. P. E. X.
Explain you own words why energy is considered to be naturals money. Give an example to support your explanation
Answer:
because we naturally use energy everyday in everyway , energy is also a bill for instance you electric bill used by energy
Explanation:
What is the awnser to that question
The voltage between two points in a circuit is 4.2 V. If the resistance between
the points is 72, what is the current, according to Ohm's law?
A. 0.058 A
B. 76.2 A
O C. 17.1 A
O D. 302 A
Answer:
I = 0.058 [A]
Explanation:
Ohm's law is defined as voltage equal to the product of current by resistance.
[tex]V =I*R[/tex]
where:
V = voltage = 4.2 [V]
I = current [amp]
R = resistivity = 72 [ohm]
Now clearing I, we have:
[tex]I = V/R\\I = 4.2/72\\I = 0.058 [A][/tex]
Answer:
A. 0.058 A
Explanation:
Which is an example of negative acceleration?
Hee Sun drew an electron dot diagram of a silicon atom as shown.
S i with 1 dot each above, right, below, left.
In addition to changing the symbol to C, how would this diagram compare with an electron dot diagram of a carbon atom (C)?
The dot to the left of the symbol would be removed in the diagram for carbon.
The same number of dots would appear in the diagram for carbon.
There would be two dots above and to the right of the symbol in the diagram for carbon.
The single dots would be replaced with two dots on each side of the symbol in the diagram for carbon.
Answer:
B
Explanation:
I took the test uwu
Answer:
B. The same number of dots would appear in the diagram for carbon.
Explanation:
took the test and got 100%
an object increases its velocity from 22 m/s to 36 m/s in 5s.what is the acceleration of the object
Answer:
2.8 m/s²
Explanation:
v=v0+at <=> 36 = 22 + a×5 <=> 5a = 36-22 <=> 5a = 14 <=> a = 14/5 <=>
<=> a = 2.8 m/s²
The velocity of a mass moving in a circular path is..
A 1 kg puck sliding on a horizontal shuffleboard court is slowed to rest by 1 point
a frictional force of 3 N. What is the coefficient of kinetic friction between
the puck and the surface of the shuffleboard court? *
O A. 0.25
O B.0.5
O c.0.15
D. .31
Answer:
miu = 0.31
Explanation:
The friction force is defined as the product of the normal force by the coefficient of friction.
[tex]f=miu*N[/tex]
where:
f = friction force = 3 [N]
miu = friction coefficient
N = normal force [N]
The normal force on a horizontal surface can be calculated by means of the product of mass by gravity.
where:
m = mass = 1 [kg]
g = gravity acceleration = 9.81 [m/s²]
[tex]N=m*g\\N=1*9.81[/tex]
[tex]N= 9,81 [N][/tex]
Now replacing in the equation above, we can find the friction coefficient.
[tex]miu=3/9.81\\miu = 0.31[/tex]
malnourishment is harmful during
Answer:
People who are in good health at the beginning of a hunger strike "are usually at little risk of dying from malnutrition for at least six to eight weeks," the guidelines state. But people who are ill can die from malnutrition in as little as three weeks. Malnutrition during pregnancy can be quite harmful. Maternal malnutrition during pregnancy can affect the wellbeing and development of the baby. Malnutrition is when the baby and in this case, the mother do not receive adequate nourishment during pregnancy. It means the baby, in the mother’s womb does not get enough nutrients to grow.
Hope this helps!
What wavelength would a ripple in water have if the frequency is 1.8 Hz and a
wave speed of 825 m/s?
Explanation:
825m/s / 1.8Hz = 458.33m
λ=v/f
λ-wavelength
v-speed
f-frequency
λ=825/1.8=458.33m
a person has gotten a new job with a much higher salary. he plans to spend his extra money on a new car and a great stereo system for his apartment.
Answer:
He will get a higher sales and income tax
Explanation:
just took the quiz and got it right
The person with a new job of a much higher salary and a new car and a great stereo system for his apartment, will attract more tax.
Effect of tax on higher salaries and properties
PAYE which is an acronym for pay as you earn, is a form of tax deducted by an employer from the employee's salaries and wages.
As the person earns higher, his income tax increases, as he acquires more luxury properties, his personal tax increases as well.
Thus, the person with a new job of a much higher salary and a new car and a great stereo system for his apartment, will attract more tax.
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