A body, initial at rest, explodes into two fragments of masses M and 3M having total kinetic energy E. The kinetic energy of the fragment of mass M after the explosion is........
1. A body, initial at rest, explodes into two fragments of masses M and 3M having total kinetic energy E. The kinetic energy of the fragment of mass M after the explosion is........
The explosion from rest is categorised as inelastic collision. Kinetic energy of the fragment of mass M after the explosion is 3E.
Penjelasan dan langkah-langkah:
Assumption:Assume m₁ and m₂ move in opposite direction after the explosion so that v₁ is positive and v₂ is negative. Initial velocity is zero (at rest), final velocity m₁ is v₁ and final velocity of m₂ is -v₂.
Use inelastic collision formula
Inelastic collision formula:
(m₁+m₂)V = m₁v₁ + m₂(-v₂)
(3M+M)(0) = 3Mv₁ + M(-v₂)
3Mv₁ = Mv₂
v₂ = 3v₁ ...................(1)Kinetic energy m₁ from the question
Kinetic energy m₁:
[tex]KE = \frac{1}{2}m_{1} v_{1}^{2}[/tex]
[tex]E = \frac{1}{2}(3M)v_{1}^{2}[/tex]
[tex]E = \frac{3}{2}Mv_{1}^{2}[/tex] ..................(2)Kinetic energy m₂:
[tex]KE = \frac{1}{2}m_{2} v_{2}^{2}[/tex]Subtitute (1)
[tex]KE = \frac{1}{2}(M)(3v_{1})^{2}[/tex]
[tex]KE = \frac{9}{2}Mv_{1}^{2}[/tex]
[tex]KE = 3(\frac{3}{2}Mv_{1}^{2})[/tex]Subtitute (2)
[tex]KE = 3E[/tex]
The kinetic energy of the fragment of mass M after the explosion is 3E.
Pelajari Lebih Lanjut
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#BelajarBersamaBrainly #SPJ1
2. two kilograms of a compond contains 30% of element A 45% of element B and 25% of element C.determine rhe masses of of three elements present ?
Berat elemen A
= 2 × 30/100.
= 0,6kg.
Berat elemen B
= 2 × 45/100.
= 0,9kg.
Berat elemen C
= 2 × 25/100.
= 0,5kg.
3. the masses to the nearest 0.5kg of two parcels are 1.5kg wnd 2.5kg. calculate the lower and upper bounds of their combined mass
[tex]\textit{Inaccuracy,} \pm 0,5\,\, kg [/tex]
[tex]\textit{Lower Bound,} (1,5-0,5)+(2,5-0,5) = 3\,\,kg [/tex]
[tex]\textit{Upper Bound,} (1,5+0,5)+(2,5+0,5) = 5\,\,kg [/tex]
[tex]\textit{Average,} 1,5+2,5=4\,\,kg [/tex]
4. Below are the masses of 8 children. 64 kg. 52 kg, 58 kg, 68 kg, 60 kg, 64 kg, 51kg, 62 kg Arrange the masses of the 8 children in increasing or decreasing order. The middle value of the masses of the 8 children is........ What is the median mass of the 8 children?.....
Jawaban:
What is the median mass of the 8 children?
The middle value of the masses of the 8 children is 61 kg
Penjelasan:
51 kg. 52 kg, 58 kg, 60 kg, 62 kg, 64 kg, 64 kg, 68 kg
60 + 62 = 122/2 = 61 kg
5. Gem stones…………………………in several parts of indonesia
Jawaban:
Spread / scattered (tersebar)
Jawaban:
Gem stones spread in several parts of Indonesia
6. anne:which thing below has stones,father?"father:.... gives us a lot of stones.a.mountain c.lakeb.cave d.valley
jawabannya kayaknya sih yang Aa
saya kurang yakin sih tapi kayaknya itu jawaban nya
7. Two spherical objects have masses of 9000 kg and 2500 kg. Their centers are separated by a distance of 1.5 m. Find the gravitational attraction between themA. 6.67 X 10-4 NB. 1.00 X 10-3 NC. 1.00 X 10-5 ND. 6.67 X 10-6 N
Jawaban:
D
Penjelasan:
https://t.tiktok.com/i18n/share/video/6989121508119547163/?region=ID&mid=6986499372095654683&u_code=diak816dgm2m1e&preview_pb=0&language=id&_d=dha21m6mea6651&share_item_id=6989121508119547163&source=h5_t×tamp=1627479309&user_id=6957307082748724230&sec_user_id=MS4wLjABAAAAF_p3A4HeNaXR8eHMTti8HtIoXQvZcvJpLUOc3CBldWYB_CPY9amkja2zpqenC39z&utm_source=copy&utm_campaign=client_share&utm_medium=android&share_iid=6957307181017007877&share_link_id=6270ed3a-54ad-467d-bb8b-cbff92220c9f&share_app_id=1340https://t.tiktok.com/i18n/share/video/6989121508119547163/?region=ID&mid=6986499372095654683&u_code=diak816dgm2m1e&preview_pb=0&language=id&_d=dha21m6mea6651&share_item_id=6989121508119547163&source=h5_t×tamp=1627479309&user_id=6957307082748724230&sec_user_id=MS4wLjABAAAAF_p3A4HeNaXR8eHMTti8HtIoXQvZcvJpLUOc3CBldWYB_CPY9amkja2zpqenC39z&utm_source=copy&utm_campaign=client_share&utm_medium=android&share_iid=6957307181017007877&share_link_id=6270ed3a-54ad-467d-bb8b-cbff92220c9f&share_app_id=1340
8. kalimantan is one of the biggest island in indonesia , it is reach of forest, pearl , and precious stones
Kalimantan adalah salah satu pulau terbesar di Indonesia, pulau tersebut kaya akan hutannya, mutiara dan batu mulia
.
Kalo jawabannya salah, mohon dimaafkan lahir dan batin yaa :v.HEHE
9. ada yg bisa gak lengkapi bahasa inggris!? i am dimas.my hobby is collecting.....i clean and....them. i find out.what kind of stone they are.i ve got lots of books about... i display the stones on...each with a label saying what of stones if is,and when and where i ....it altogether,i ve got 250 stones in my.... its a good...because
i am Dimas. My hobby is collecting (stones), I clean and (wash) them. I find out. What kind of stone they are. I've got lots of books about (them), I display the stones on (glass) each with a label saying what of stones it is, and when and where I (found) it altogether, I've got 250 stones in my (home), its a good (hobby) because (make me happy)
10. what will be the maximum pressure for the object that has a mass of 10kg and dimension of 2m x 4 m x 1 m?
Jawaban:
what will be the maximum pressure for the object that has a mass of 10kg and dimension of 2m x 4 m x 1 m?
11. The village______is made of land and stones.the landToma
Penjelasan:
the village here is made of land and stones the land
the village (here)is made of land and stones.
the land
Toma
12. 2. The force of gravity between two masses can be compared with the magnetic force between two magnets. a. Describe two ways that these forces are similar.
Jawaban:
The key difference between gravitational force and magnetic force is that gravitational force acts on all things that have a mass whereas magnetic force acts on things having iron or an electric charge on them. Moreover, gravitational force is usually a weak force while magnetic force is a much stronger force
Penjelasan:
#maaf kalo salah
Jawaban:
1. Attracts objects to a central point.
2. Has a field or surrounding area that is able to attract objects.
Penjelasan:
1. Attracts objects to a central point.In a magnetic force, magnets will attract each other with the same magnetism between 2 different poles or will attract objects made of metal. Whereas in the law of earth's gravity, objects above the earth's surface will be relatively attracted to the center of the earth, because of that we can stand with certainty without lacking balance and cause us to fly as if in outer space that does not have earth's gravity or gravity the earth is small, so does its work on other objects such as mountains, seas, water, and other objects.
2. Has a field or surrounding area that is able to attract objects.For a field or area of attraction, the magnet has a magnetic field or areas of metal or magnetic objects that can be attracted by other magnets and the farther away from the magnet the weaker the attraction will be. Whereas in the gravitational force of the earth, the area or field of objects that can be pulled is around from the center of the earth to the atmosphere. Just like a magnet, the farther away from the center of the earth, the lower the gravitational force. The proof is like us and other natural objects that can be strongly attracted and stand upright on the earth's surface. But it's different when in the atmosphere or above the gravitational force will be weaker, the evidence is like astronauts who fly when they are outside the range of the earth's gravitational force with other objects.
13. 2. The force of gravity between two masses can be compared with the magnetic force between two magnets. a. Describe two ways that these forces are similar. 1. 2. b. Describe one way that these forces are different.
Jawaban:
Hence the new force between the magnetic poles if the distance between them gets doubled and their pole strength also gets doubled remains unchanged i.e., the force between them is F .
Penjelasan:
#maaf kalo salah
14. The walls of the building are..... with beautiful carving and precious stones.
Jawaban:
The walls of the building are good with beautiful carving and precious stones.
Penjelasan:
Sorry if i'm wrong^ v ^
15. Find the Value Of (2m + n)(m - n + 1) when(a.) m = 5 and n = 3Help!!! Pls Jawab :')
Jawaban:
diketahui:
• Nilai m = 5
• Nilai n = 3
ditanya: (2m + n)(m - n + 1)=....?
jawab:
= (2(5) + 3)(5 - 3 + 1)
= (10 + 3) . 3
= 13 . 3
= 39
semoga membantu,
met belajar skuy :)
16. arti dari stones and sand
artinya batu batuan dan pasir
semoga membantustone: batu
sand: pasir
17. The equation mx^2+nx+2n=8x+4 has the roots n and 1/m, m≠0. (a) Find the value of m and of n. (b) Hence, using the value of m and of n in (a),find the quadratic equation that has the roots 2m and - 1/n. .
Penjelasan dengan langkah-langkah:
It's known that:
f(x) → mx² + nx + 2n = 8x + 4
f(x) → mx² + nx - 8x + 2n - 4 = 0
f(x) → mx² + x(n-8) + (2n - 4), has roots:
x1 = n x2 = 1/m
it's also known that there is a formula for a quadratic equation f(x) → ax² + bx + c = 0 which has roots x1 and x2, so it can be applies:
x1 + x2 = -b/a
x1 × x2 = c/a
in the question:
a = m b = (n-8) c = (2n-4)
a. x1 + x2 = -b/a
n + 1/m = -((n-8)/m)
(nm+1)/m = -((n-8)/m)
nm+1 = -n+8
nm+n = 7 ..................... (1) 4m + 4 = 7 → m = ¾
x1 × x2 = c/a
n×1/m = (2n-4)/m
n = 2n-4
4 = n
b. x1 = 2m = 2.¾ = 3/2
x2 = -1/4
x1 + x2 = -b/a x1 × x2 = c/a
3/2 - ¼ = -b/a 3/2 × (-¼) = c/a
5/4 = -b/a -⅜ = c/a
10/8 = -b/a
b= -10
a = 8
c = -3
g(x) = 8x² - 10x - 3
18. kalimantan is one of the biggest island in indonesia ,it is reach of forest , pearl, and precious stones TERJEMAHKAN KE DALAM BAHASA INDONESIA
Borneo adalah salah satu pulau terbesar di Indonesia, itu adalah jangkauan hutan, mutiara, dan batu mulia
19. The bridge collapsed………… it was made of stones
Jawaban:
Because
Penjelasan:
The bridge collapsed because it was made of stones
Artinya:
Jembatan hancur karena terbuat dari batu
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20. 4. A rectangular pond of length 18 m and breadth 8 m is surrounded by a path 2 m wide asshown. Find the area of the path.2mPond8m2m2 m18 m2 m
Jawab:
Find the area of a square park whose perimeter is 320 m. ... Area of rectangular door = length * breadth = 2 m * 1 m = 2 m2 ... A circular flower bed is surrounded by a path 4 m wide. ... Find the circumference of the inner and the outer circles, shown in the adjoining figure. ... (18 * 10) – (1/2 * 10 * 6 + 1/2 * 8 * 10).
Penjelasan dengan langkah-langkah:
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