Tag: science & technology

Non-metals exist in all three states - solid (sulfur, carbon), liquid (bromine at room temperature), and gaseous (oxygen, nitrogen). At room temperature, most are either solids or gases. Option B contains a typo ('soilid' instead of 'solid').

The unit of capacitance is the Farad (F), not the Henry. The Henry (H) is the unit of inductance, which measures opposition to changes in current. Capacitance measures a capacitor's ability to store charge per unit voltage.

The sum of pH and pOH is always 14.0 at 25°C for any aqueous solution. This relationship comes from the water dissociation constant (Kw = [H+][OH-] = 1.0 × 10^(-14) at 25°C). It's a fundamental concept in acid-base chemistry.

Ecology is the study of how organisms interact with each other and their environment. Zoology specifically studies animals, botany studies plants, and biology is the broad study of all living things. Ecology focuses on relationships and interactions within ecosystems.

Physics is the fundamental science that studies matter, energy, and their interactions - encompassing light, heat, electricity, and mechanical energy. Optomology (option A) relates to eye care and vision. Thermo-nuclear mechanics (C) is a specialized subfield, and electronics (D) focuses only on electrical circuits and devices, making physics the correct broad answer.

Karnaugh map (K-map) is a graphical method used to simplify Boolean expressions in digital logic design. It provides a systematic way to reduce complex Boolean expressions to their minimal form, which is essential for optimizing digital circuits. While K-maps are used in designing logic gates and multiplexers, their primary purpose is simplifying the underlying Boolean expressions.

A register in digital electronics is a group of flip-flops used to store multiple bits of binary data. Each flip-flop can store one bit, so multiple flip-flops are combined to create registers that store bytes or words. Registers are NOT made of OR gates or combinations of logic gates - those are used for combinational logic, not data storage.

Each flip-flop stores exactly one bit of binary information (0 or 1). This is fundamental to digital electronics - flip-flops are the basic building blocks for memory and registers. Multiple flip-flops can be combined to store multiple bits (8 flip-flops for a byte, 16 for a word, etc.), but each individual flip-flop holds only one bit.