Tag: science & technology

Quizzes (551) Questions (11015)

Questions Related to science & technology

Multiple choice general knowledge science & technology

Why do a leather cricket ball roll on the field for a larger distance and with greater speed than a tennis one ? Select the correct option/options below:

  1. Frictional forces act more on tennis balls

  2. Leather balls are shiny

  3. Tennis balls are softer

  4. Leather balls are harder
Reveal answer Fill a bubble to check yourself
A,C,D Correct answer
Explanation

This question tests physics concepts related to motion on surfaces. A leather cricket ball rolls farther and faster than a tennis ball due to multiple factors: (A) Tennis balls experience more friction due to their fuzzy surface and greater deformation, (C) Tennis balls are softer and deform more, increasing rolling resistance, and (D) Leather balls are harder and maintain their shape better, reducing energy loss. Option B is incorrect because shininess doesn't significantly affect rolling distance.

Multiple choice general knowledge science & technology

Why does all loudspeakers conical in shape?

  1. Conical shape lets emanating sound waves gradually into the air

  2. The conical shape allows echoing, which increases volume

  3. Conical shape provides maximum power transfer

  4. Conical shape protects the internal parts from climate
Reveal answer Fill a bubble to check yourself
A,C Correct answer
Explanation

The conical shape of loudspeakers serves two key purposes: it allows sound waves to transition gradually from the speaker to the air (impedance matching), and it ensures maximum power transfer between the speaker cone and the surrounding air. Echoing would distort sound rather than help, and climate protection is not the primary purpose.

Multiple choice general knowledge science & technology

What is the symbol for Aluminium

  1. Au

  2. Al

  3. Am

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

The chemical symbol for Aluminium is Al, derived from its Latin name 'Aluminum' or 'Aluminium'. Au is the symbol for Gold, Am represents Americium, and Sb is the symbol for Antimony. These symbols are standardized internationally by IUPAC.

Multiple choice general knowledge science & technology

How do we know the weight of the moon?

  1. Density of samples from the moon are calculated and then multiplied by the volume

  2. It is calculated from the speed of orbting satellites

  3. It is calculated from the speed of the moon revolving round the earth

  4. All of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The moon's mass is calculated by analyzing the orbital motion of satellites (both natural and artificial) around the moon using Newton's law of gravitation. By measuring how objects orbit the moon, scientists can determine its gravitational influence and thus its mass. While we have lunar samples, they're not used for mass calculation this way, and the moon's revolution speed around Earth gives Earth's mass, not the moon's.

Multiple choice general knowledge science & technology

What will happen if you open a bottle of water on the moon's surface?

  1. The water will come out of the bottle and float

  2. The water will freeze

  3. Water will spill out of the bottle and fall slowly and form form large droplets

  4. The water will eventually evaporate
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

On the moon's surface with near-vacuum conditions, water would rapidly evaporate (sublime) due to extremely low atmospheric pressure. The water wouldn't simply float (A), freeze immediately (B), or form slow droplets (C). Evaporation into the vacuum happens quickly.