Tag: science & technology

Quizzes (551) Questions (11015)

Questions Related to science & technology

Multiple choice general knowledge science & technology

A snail creeps 7 ft up a wall during the daytime. After all the labor it does throughout the day, it stops to rest a while... but falls asleep!! The next morning it wakes up and discovers that it has slipped down 5 ft while sleeping. If this happens every day, how many days will the snail take to reach the top of a wall 27 ft in height?

  1. 14

  2. 13

  3. 15

  4. 11
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Each day, snail makes net progress of 7-5 = 2 ft. After 10 days: reaches 20 ft (10 × 2). Day 11: climbs 7 ft from 20 ft → reaches 27 ft and stays at top (doesn't slip back once reached). Common mistake: calculating 27/2 = 13.5 and rounding to 14, but this ignores that on the final day, the snail doesn't slip back.

Multiple choice general knowledge science & technology

A painting job can be completed by 6 painters in 36 days. If 18 more painters join the team 8 days after starting work on the job, then how many more days are required to complete the job?

  1. 12

  2. 3

  3. 5

  4. 7
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Total work = 6 × 36 = 216 painter-days. Work done in first 8 days: 6 × 8 = 48 painter-days. Remaining work = 216 - 48 = 168 painter-days. New team size = 6 + 18 = 24 painters. Days needed = 168/24 = 7 more days. Common mistake: calculating total days (8+7=15) instead of 'more days' required.

Multiple choice general knowledge science & technology

A set of football matches is to be organized in a "round-robin" fashion, i.e., every participating team plays a match against every other team once and only once. If 66 matches are totally played, how many teams participated?

  1. 11

  2. 12

  3. 13

  4. 14
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In a round-robin tournament, each team plays every other team exactly once. The total number of matches is given by the formula n(n-1)/2, where n is the number of teams. Setting this equal to 66 gives n(n-1) = 132, which factors to 12 × 11 = 132, so n = 12 teams. Option A (11 teams) would give only 55 matches, while options C and D would give 78 and 91 matches respectively.

Multiple choice general knowledge science & technology

Tamil equivalent of 'Mass' is

  1. Edai

  2. Nirai

  3. Alavu

  4. Nilai
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In Tamil scientific terminology, 'Nirai' refers to mass - the quantity of matter in an object. This is distinct from 'Edai' which means weight (force due to gravity), 'Alavu' which refers to measurement, and 'Nilai' which means value or level. Understanding this distinction is fundamental in physics.

Multiple choice general knowledge science & technology

Tamil Terminology for 'Temperature'..

  1. Soodu

  2. Veppanilai

  3. Kaalanilai

  4. Veppam
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

'Veppanilai' is the standard Tamil scientific term for temperature. 'Soodu' refers to heat itself, 'Kaalanilai' means time period or era, and 'Veppam' is the colloquial term for hotness. Temperature as a scientific measurement requires specific terminology.

Multiple choice general knowledge science & technology

What is the exact term used in Ariviyal for 'Time'?

  1. Kaalam

  2. Mani

  3. Neram

  4. Vinadi
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In Tamil scientific terminology, 'Kaalam' is the precise term for the concept of time. 'Mani' colloquially refers to clock or hour, 'Neram' is the general word for time in everyday usage, and 'Vinadi' specifically means minute. Scientific Tamil distinguishes between the concept and its measurements.

Multiple choice general knowledge science & technology

If you apply twice the force on an object for twice the time, there will be a change in velocity that will be a (an)....

  1. 8 fold increase

  2. 4 fold increase

  3. 2 fold increase

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Using impulse-momentum theorem: impulse J = F × t = Δp = mΔv. When force doubles (2F) and time doubles (2t), impulse becomes 2F × 2t = 4Ft, which is 4 times the original. Since mass is constant, velocity change also increases 4-fold. The 8-fold option incorrectly multiplies only the force, while 2-fold ignores one factor.

Multiple choice general knowledge science & technology

If a 10kg object is pushed with a 20N force and there is a coefficient of friction of 0.4, what will the acceleration be?

  1. 0 meters per second squared

  2. 8 meters per second squared

  3. 80 meters per second squared

  4. 0.8 meters per second squared
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Net force = applied force - friction. Friction = μmg = 0.4 × 10 × 9.8 = 39.2N. Applied force = 20N, so friction exceeds applied force. The object won't move, meaning acceleration is 0 m/s². Options B and D come from incorrectly ignoring friction or misapplying the formula.

Multiple choice general knowledge science & technology

A real image is never created by a) concave lenses b) convex lenses c) concave mirrors d) convex mirrors

  1. b) and c)

  2. a) and c)

  3. All of the above ie a,b,c,d

  4. a) and d)
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Concave lenses always diverge light and cannot form real images. Convex mirrors also diverge light, producing only virtual images. Both concave and convex lenses can form real images depending on object position, and concave mirrors can form real images when the object is beyond the focal point.