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Бардык посттор
05.05.202513:10
Don't Forget About Today Question Time! 😊

At 3:00 ⏳

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 👉 @addis_entrance_hub
05.05.202521:53
important terms in physics for EUEE


1. Force: An interaction that causes an object to change its velocity, typically measured in newtons (N).

2. Mass: A measure of the amount of matter in an object, usually measured in kilograms (kg).

3. Weight: The force exerted by gravity on an object, calculated as the mass of the object multiplied by the acceleration due to gravity (W = mg).

4. Energy: The capacity to do work, which can exist in various forms such as kinetic, potential, thermal, and chemical energy.

5. Kinetic Energy: The energy possessed by an object due to its motion, calculated using the formula KE = 1/2 mv^2, where m is mass and v is velocity.

6. Potential Energy: The energy stored in an object due to its position or configuration, often associated with gravitational or elastic forces.

7. Work: The energy transferred to or from an object via the application of force along a displacement, calculated as W = Fd cos(θ), where F is force, d is displacement, and θ is the angle between the force and displacement vectors.

8. Power: The rate at which work is done or energy is transferred, measured in watts (W), where 1  W = 1  J/s.

9. Momentum: The quantity of motion an object has, defined as the product of its mass and velocity (p = mv).

10. Impulse: The change in momentum of an object when a force is applied over a period of time, calculated as J = F Δ t.

11. Acceleration: The rate of change of velocity of an object with respect to time, measured in meters per second squared (m/s²).

12. Newton’s Laws of Motion: Three fundamental principles that describe the relationship between the motion of an object and the forces acting on it:
   - First Law: An object at rest stays at rest, and an object in motion stays in motion unless acted upon by a net external force.
   - Second Law: The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass (F = ma).
   - Third Law: For every action, there is an equal and opposite reaction.

13. Friction: The resistance encountered when one surface moves over another, which can be static or kinetic.

14. Thermodynamics: The branch of physics that deals with heat, work, temperature, and energy transfer.

15. Entropy: A measure of disorder or randomness in a system; in thermodynamics, it indicates the direction of spontaneous processes.

16. Electric Charge: A property of matter that causes it to experience a force in an electromagnetic field; charges can be positive or negative.

17. Voltage: The electric potential difference between two points in a circuit, measured in volts (V).

18. Current: The flow of electric charge in a circuit, measured in amperes (A).

19. Resistance: The opposition to the flow of electric current in a conductor, measured in ohms (Ω).

20. Ohm’s Law: A fundamental relationship in electrical circuits stating that V = IR, where V is voltage, I is current, and R is resistance.

21. Wave: A disturbance that transfers energy through space or matter, characterized by its wavelength, frequency, and amplitude.

22. Frequency: The number of cycles of a wave that pass a given point per unit time, measured in hertz (Hz).

23. Wavelength: The distance between successive crests (or troughs) of a wave, typically measured in meters.

24. Refraction: The bending of light as it passes from one medium to another due to a change in speed.

25. Reflection: The bouncing back of light or sound waves when they encounter a surface.

26. Gravity: A natural phenomenon by which all things with mass are attracted toward one another; described by Newton’s law of universal gravitation.

27. Quantum Mechanics: The branch of physics that deals with the behavior of particles on very small scales, such as atoms and subatomic particles.


@addis_entrance_hub
11.05.202512:18
መልካም የእናቶች ቀን 🎁🎁🎁‼️

ለመላው እናቶች (moms)፣ ለአያቶች (Grandmoms)፣ ለአሳዳጊ እናቶች (foster moms)፣ ለእንጀራ እናቶች (stepmoms)፣ ለተተኪ እናቶች (Surrogate moms) እና የወደፊት እናቶች (Moms-to-be) ........መልካም የእናቶች ቀን ይሁንላችሁ!

እናት ፍቅር ናት 🥰🥰!

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05.05.202506:36
እንኳን ለኢትዮጵያ አርበኞች ቀን አደረሰን! አባቶቻችን ለዚች ሀገር እና ህዝቧ በሰሩት ጀብድ እንኮራለን።
:
:
:
እናመሰግናቸዋለንም!!!

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Кайра бөлүшүлгөн:
TIKVAH-ETHIOPIA avatar
TIKVAH-ETHIOPIA
09.05.202515:27
የ12ኛ ክፍል ብሔራዊ ፈተና የሚሰጥበት ቀን ይፋ ተደረገ።

የ2017 ትምህርት ዘመን ኢትዮጵያ ሁለተኛ ደረጃ ትምህርት ማጠናቀቂያ / የ12ኛ ክፍል ፈተና የሚሰጥበት መርሃ ግብር ይፋ ተደርጓል።

የትምህርት ምዘናና ፈተናዎች አገልግሎት ይፋ ባደረገው መርሃ ግብር ፈተናው ከሰኔ 23/2017 ዓ/ም ጀምሮ እስከ ሐምሌ 8/2017 ዓ/ም የሚሰጥ ይሆናል።

በወረቀት የሚፈተኑ የተፈጥሮ ሳይንስ ተፈታኞች ሰኔ 21 እና 22/2017 ዓ/ም እንዲሁም የማህበራዊ ሳይንስ ተፈታኞች ሰኔ 29 እና 30/2017 ዓ/ም ወደሚፈተኑበት ዩኒቨርሲቲ የሚገቡ ይሆናል፡፡

በበይነ መረብ የሚፈተኑ ተፈታኞች ከመኖሪያ ቤታቸው በየቀኑ እየተመላለሱ በተመደቡበት መፈተኛ ማዕከል የሚፈተኑ ሲሆን ዝርዝር መርሃ ግብሩ ከላይ ተያይዟል።

የፈተናው ይዘት በተማሪው መጽሐፍ ላይ ያተኮረ በመሆኑ እያንዳንዱ ተፈታኝ በትምህርት ቤቱ የተማረበትን የተማሪ መጽሐፍ መሠረት አድርጎ ተገቢ የሆኑ አጋዥ መጽሐፍትን ለበለጠ እውቀትና መረዳት በመጠቀም እንዲዘጋጅ አገልግሎቱ ጥሪውን አስተላልፏል።

በፈተና ወቅት ለፈተና ስርቆትና ኩረጃ የሚውሉ ማንኛውንም ቁሳቁሶች መጠቀም የተከለከለ ነው ተብሏል።

መረጃው ከትምህርት ምዘናና ፈተናዎች አገልግሎት የተላከ ነው።

@tikvahethiopia
05.05.202518:52
19. In the Lock and Key Model, the enzyme's active site:

A. Is flexible and adjusts to accommodate the substrate.
B. Has a rigid, specific shape that matches only one substrate.
C. Undergoes major changes when the substrate binds.
D. Is adapted to catalyze multiple types of reactions.

Comment Your Answer 😊


@addis_entrance_hub
05.05.202518:54
20. The Lock and Key Model of enzyme action can be compared to:

A. A hand fitting into a glove
B. A lock opening with a key of any shape.
C. A key that changes shape to fit any lock.
D. A hand changing its shape to fit any glove.

Comment Your Answer 😊


@addis_entrance_hub
05.05.202518:47
17. Which of the following best describes the Lock and Key Model of enzyme action?

A. The enzyme's active site undergoes a conformational change when the substrate binds.
B. The enzyme has a rigid active site that fits exactly with the substrate.
C. The enzyme's active site is flexible and adapts to fit the substrate.
D. The substrate changes shape to fit the enzyme's active site.

Comment Your Answer 😊


@addis_entrance_hub
05.05.202518:43
16. Which factor does NOT typically affect enzyme-catalyzed reactions?

A. Ionic strength of the environment
B. The concentration of the substrate and enzyme
C. The presence of coenzymes or cofactors
D. The wavelength of light used during the reaction

Comment Your Answer 😊


@addis_entrance_hub
09.05.202517:12
📆 Days Left For Final Exam

👉 Natural: 52 days left
👉 Social: 60 days left

@addis_entrance_hub
05.05.202519:02
✅ Full Answer For Today Questions | Enzyme |

1. C. No inhibitors, competitive inhibitors and non-competitive inhibitors.
2. A. Competitive inhibitors bind to the enzyme's active site, while non-competitive inhibitors bind to a different site.
3. C. The reaction rate decreases, but increasing substrate concentration can overcome the effect.
4. C. The graph for the inhibitor will show a lower Vmax but the same initial rate.
5. B. The graph will show a lower Vmax and the same Km.
6. C. It allows the prediction of how inhibitors affect enzyme activity.
7. B. Modify the enzyme’s active site for better substrate binding at low energy states.
8. C. It allows the prediction of how inhibitors affect enzyme activity.
9. B. It can increase enzyme activity up to an optimal temperature, after which the activity decreases.
10. C. The enzyme may denature and lose its ability to function.
11. A. It binds to the active site, preventing the substrate from binding.
12. A. Increasing enzyme concentration increases the reaction rate until all substrates are used up.
13. C. It binds to a site other than the active site, causing the enzyme to change shape and reducing its activity.
14. C. Increasing substrate concentration up to a certain point.
15. C. Enzyme activity increases with temperature until an optimal point, after which it declines due to denaturation.
16. D. The wavelength of light used during the reaction.
17. B. The enzyme has a rigid active site that fits exactly with the substrate.
18. B. The active site of the enzyme undergoes a slight change to fit the substrate.
19. B. Has a rigid, specific shape that matches only one substrate.
20. A. A hand fitting into a glove.

If you have any correction on today questions the comment section is open!
05.05.202518:09
4, If you were graphing the reaction rate versus substrate concentration for a reaction with a competitive inhibitor, what would you expect the graph to look like compared to the control (no inhibitor)?

A. The graph for the inhibitor will show a steeper slope and reach Vmax faster.
B. The graph for the inhibitor will show a higher Vmax but a lower initial rate.
C. The graph for the inhibitor will show a lower Vmax but the same initial rate.
D. The graph for the inhibitor will show the same Vmax but a higher initial rate.

Comment Your Answer 😊


@addis_entrance_hub
05.05.202518:48
18. According to the Induced Fit Model, what happens when the substrate binds to the enzyme's active site?

A. The enzyme and substrate fit together perfectly without any changes.
B. The active site of the enzyme undergoes a slight change to fit the substrate.
C. The substrate remains unchanged, and the enzyme's active site remains rigid.
D. The substrate binds at multiple sites on the enzyme.

Comment Your Answer 😊


@addis_entrance_hub
10.05.202519:28
10. Which one of the following sets contains the solution for |x^2 - 3| - 1 >= 0?

A. {x : 1 <= x <= 3}
B. {x : 2 <= x <= 4}
C. {x : x <= -2 or x >= 2}
D. {x : x <= -2 or x >= 2}

Comment Your Answer 😊


@addis_entrance_hub
10.05.202518:55
Who is is ready for today Math's questions?

👍 I am ready.
😢 No, I am not.
Көбүрөөк функцияларды ачуу үчүн кириңиз.