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📚 Physics ስለ rotational motion  ማትሪክ ላይ ሊመጡ የሚችሉ 10 ጥያቄዎች ከነመልሶቻቸው ።

1. What is the basic concept behind rotational dynamics in physics?
   A) Conservation of angular momentum
   B) Conservation of linear momentum
   C) Conservation of energy
   D) Conservation of time

Answer: A) Conservation of angular momentum

2. Which of the following measurements is used to quantify rotational motion?
   A) Mass
   B) Velocity
   C) Angular velocity
   D) Acceleration

Answer: C) Angular velocity

3. Which statement is correct about torque?
   A) Torque is a vector quantity
   B) Torque is a scalar quantity
   C) Torque is always equal to zero
   D) Torque is inversely proportional to angular acceleration

Answer: A) Torque is a vector quantity

4. What is the moment of inertia?
   A) A measure of an object's resistance to linear motion
   B) A measure of an object's resistance to angular motion
   C) A measure of an object's speed in circular motion
   D) A measure of an object's temperature

Answer: B) A measure of an object's resistance to angular motion

5. Which of the following factors affect an object's moment of inertia?
   A) Shape and mass distribution
   B) Velocity and acceleration
   C) Pressure and density
   D) Color and texture

Answer: A) Shape and mass distribution

6. The rotational analog of Newton's second law is given by:
   A) F = m × a
   B) F = m × g
   C) F = m × r
   D) τ = I × α

Answer: D) τ = I × α

7. What is centripetal force?
   A) The force that causes an object's circular motion
   B) The force that keeps an object at rest
   C) The force that causes rotational motion
   D) The force that opposes motion

Answer: A) The force that causes an object's circular motion

8. Which of the following best describes angular momentum?
   A) The force applied to rotate an object
   B) The product of moment of inertia and angular velocity
   C) The tendency of an object to maintain its rotational motion
   D) The force that causes linear motion

Answer: B) The product of moment of inertia and angular velocity

9. Conservation of angular momentum implies:
   A) Total angular momentum can change over time
   B) Angular momentum is conserved only in linear motion
   C) Angular momentum is conserved in rotational motion
   D) Angular momentum is not a conserved quantity

Answer: C) Angular momentum is conserved in rotational motion

10. What is the relationship between torque and angular acceleration?
   A) They are directly proportional
   B) They are inversely proportional
   C) They have no relationship
   D) Torque does not affect angular acceleration

Answer: A) They are directly proportional

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📌 ለሶሻል ተማሪዎች ማትሪክ ላይ ሊመጡ የሚችሉ 10 የጂኦግራፊ ጥያቄዎች

1. Which of the following climates is characterized by very low precipitation and extreme temperature variations between day and night?

   • A) Tropical Rainforest

   • B) Desert

   • C) Mediterranean

   • D) Tundra

2. What is the primary driver of ocean currents that influence global climate patterns?

   • A) Wind patterns

   • B) Salinity differences

   • C) Earth's rotation

   • D) Solar radiation

3. Which climate zone is characterized by permanent ice and tundra vegetation?

   • A) Polar Climate

   • B) Humid Continental

   • C) Subtropical

   • D) Marine West Coast

4. The Köppen climate classification system divides climates into how many main categories?

   • A) 4

   • B) 5

   • C) 6

   • D) 7

5. Which of the following factors does NOT significantly influence a region's climate?

   • A) Latitude

   • B) Altitude

   • C) Population density

   • D) Proximity to water bodies

6. What type of climate is typically found in the Mediterranean region, characterized by hot, dry summers and mild, wet winters?

   • A) Csa

   • B) BSh

   • C) Dfb

   • D) Af

7. Which phenomenon refers to the periodic warming of ocean surface temperatures in the central and eastern Pacific Ocean, affecting global weather patterns?

   • A) La Niña

   • B) El Niño

   • C) Monsoon

   • D) Typhoon

8. What is the term for the gradual increase in Earth's average surface temperature due to human activities, primarily fossil fuel combustion?

   • A) Climate Adaptation

   • B) Global Warming

   • C) Urban Heat Island Effect

   • D) Ozone Depletion

9. Which region is most likely to experience a monsoon climate?

   • A) Northern Europe

   • B) Southeast Asia

   • C) Arctic Circle

   • D) Central Australia

10. The concept of "climate feedback loops" is best described as:

    • A) Changes in climate due to human intervention

    • B) Processes that amplify or dampen climate change effects

    • C) Weather patterns that repeat annually

    • D) Seasonal variations in temperature


Answers

1. B) Desert - Deserts are characterized by very low precipitation and extreme temperature variations between day and night.

2. A) Wind patterns - Wind patterns are the primary driver of ocean currents that influence global climate patterns.

3. A) Polar Climate - The polar climate zone is characterized by permanent ice and tundra vegetation.

4. B) 5 - The Köppen climate classification system divides climates into 5 main categories.

5. C) Population density - Population density does NOT significantly influence a region's climate compared to latitude, altitude, and proximity to water bodies.

6. A) Csa - The Mediterranean climate is typically classified as Csa, characterized by hot, dry summers and mild, wet winters.

7. B) El Niño - El Niño refers to the periodic warming of ocean surface temperatures in the central and eastern Pacific Ocean, affecting global weather patterns.

8. B) Global Warming - The term for the gradual increase in Earth's average surface temperature due to human activities, primarily fossil fuel combustion, is global warming.

9. B) Southeast Asia - Southeast Asia is most likely to experience a monsoon climate.

10. B) Processes that amplify or dampen climate change effects - Climate feedback loops refer to processes that amplify or dampen the effects of climate change.

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📚 EUEE 2008 Aptitude

1. If n = 9 x 28 x 26, which of the following is NOT an integer?

A. n/18    B. n/32   C. n/21   D. n/36
Answer B

2. The sum of the first nine natural numbers (1, 2,.....,9) is

A. 90     B. 55   C. 45     D. 100
Answer  c

3. If a + b = 10 and a - b = 5, then a2- b2 is equal to

A. 50     B. 1/2   C. 5    D. 2
Answer A

4. In which of the following pair of number is the first number or expression necessarily less than the second number or expression?

A. 3/7 ; 9/49

B. x/4 ; 14/x , for x > 0

C. (2/3)^2 ; 2 /(3^2)

D. [(3/7)(24/25)]:1
Answer D

5. Which of the following fractions is greater than 3/4: and less than 5/6?

A. 1/2     B. 4/5   C. 2/3    D. 9/10
Answer B

6.  (100 x 5^4) = ?

A. 62500      B. 76600  C. 67000     D. 77200
Answer A

7. What decimal of an hour is a second?

A. 0.0167    B. 0.000126   C. 0.0256    D. 0.00027
Answer    D

8. What least number should be added to 1056, so that the sum is completely divisible by 23?
A. 18    B. 2     C. 3    D. 21

Answer  B

9. The largest 4 digit number exactly divisible by 88 is:

A. 9768   B. 9988   C. 9944   D. 8888
Answer  C

10. The greatest number of four digits which is divisible by 15, 25, 40 and 75 is:

A. 9600  B.9000  C. 9400  D. 9800
Answer  A

11. What is the missing number in the following series? 
1, 9, 25, 49, ()

A. 54   B. 56   C. 81   D. 64
Answer  C

12. Which of the following is the largest fraction?

A. 7/8  B. 3/4  C. 4/5   D. 7/9
Answer A

13. All of the following are ways to write 20 percent of N, except

A. 0.20 N     B. 20 N  C. 1/5 N    D. 20/100 N

Answer B

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