GK: Class 12 General Q&A · Page 114
3,658 free answers on GK (General) for Class 12 students, across CBSE, ICSE and State boards.
Question & Answer
Questions
- GeneralClass 12All
What is v² in kinematics?
In kinematics equations, v² (v squared) represents the square of final velocity. It appears in the equation v² = u² + 2as because this relationship eliminates the time variable, making it useful when time isn't known or needed. Squaring velocity also relates to kinetic energy (KE = ½mv²), connecting kinematics with energy concepts in physics.
- GeneralClass 12All
: What speed is 3×10⁸?
3×10⁸ meters per second (300,000,000 m/s or 300,000 km/s) is the speed of light in a vacuum, denoted by the symbol 'c'. This is the fastest speed possible in the universe according to Einstein's theory of relativity. Light travels this distance every second, which means it could circle Earth's equator about 7.5 times in just one second. This constant appears in Einstein's famous equation E=mc².
- GeneralClass 12All
Are 40°C and 40°F the same?
No, they are very different temperatures. 40°C equals 104°F (hot weather or a high fever), while 40°F equals 4.4°C (cold weather). The only temperature where Celsius and Fahrenheit show the same numerical value is -40 degrees (-40°C = -40°F
- GeneralClass 12All
Which is colder: minus 40°C or 40°F?
Minus 40°C is much colder. In fact, -40°C equals -40°F (they're the same temperature), while 40°F equals 4.4°C. So 40°F is significantly warmer it's a chilly but manageable temperature, whereas -40° is dangerously cold.
- GeneralClass 12All
Is 40°C 104°F? True or false?
True. 40°C equals 104°F. This temperature represents a dangerous fever in humans or very hot weather conditions.
- GeneralClass 12All
Is 100°F equal to 40°C?
Not exactly. 100°F equals approximately 37.8°C, not 40°C. The value 40°C equals 104°F. However, for rough estimations, some people round 100°F to about 38°C.
- GeneralClass 12All
Is 32°C 100°F?
No. 32°C equals 89.6°F. Meanwhile, 100°F equals 37.8°C. Note that 32°F equals 0°C (water's freezing point), which might cause confusion.
- GeneralClass 12All
What is 50 degrees from F to C?
50°F equals 10°C. This is cool weather, typical of spring or fall temperatures. The calculation: (50 - 32) × 5/9 = 10°C.
- GeneralClass 12All
What is 70°F in Celsius?
70°F equals approximately 21°C. This is considered a comfortable room temperature for most people.
- GeneralClass 12All
How warm is 70°F in C?
70°F equals 21.1°C, which is pleasantly warm ideal room temperature for many people. It's comfortable weather for outdoor activities without being too hot or cold.
- GeneralClass 12All
Is 77°F hot?
77°F (25°C) is warm but not hot for most people. It's pleasant summer weather, comfortable for outdoor activities. Whether it feels hot depends on humidity, personal preference, and what you're accustomed to. In air-conditioned spaces, this might feel slightly warm.
- GeneralClass 12All
What is 375°F in C?
375°F equals approximately 190.6°C. This is a common oven temperature for baking, equivalent to about 190°C or gas mark 5 in cooking.
- GeneralClass 12All
What is 373 K to °C?
373 K (or more precisely 373.15 K) equals 100°C. This is the boiling point of water at standard atmospheric pressure.
- GeneralClass 12All
What's 37.8°C in Fahrenheit?
37.8°C equals 100.04°F (approximately 100°F). This temperature indicates a low-grade fever in humans.
- GeneralClass 12All
What is 1°C to 1°F?
1°C equals 33.8°F. To convert, use the formula: °F = (°C × 9/5) + 32, so (1 × 9/5) + 32 = 33.8°F.
- GeneralClass 12All
What is 2°C to F?
2°C equals 35.6°F. This is cold weather, just above freezing. The calculation: (2 × 9/5) + 32 = 35.6°F.
- GeneralClass 12All
What is a 135°F fever in Celsius?
135°F equals 57.2°C. This temperature is incompatible with life human body temperature cannot reach this level. Normal fever ranges from 100.4-104°F (38-40°C). A reading of 135°F would indicate a thermometer error or measurement mistake. Seek immediate medical attention for any fever above 104°F (40°C).
- GeneralClass 12All
How much is 102°F fever in C?
102°F equals 38.9°C. This is a moderate fever that requires monitoring and possibly medical attention, especially in children or if accompanied by other concerning symptoms.
- GeneralClass 12All
What is 102.3°F in Celsius?
102.3°F equals approximately 39.1°C. This is a moderate to high fever that should be monitored closely. Medical evaluation may be needed depending on duration and accompanying symptoms.
- GeneralClass 12All
Is a 101.5°F fever serious?
101.5°F (38.6°C) is a moderate fever. While not immediately dangerous for most adults, it warrants attention. For adults, monitor symptoms and seek medical care if the fever persists beyond 3 days, reaches 103°F (39.4°C), or is accompanied by severe symptoms. For infants and young children, lower thresholds apply consult a pediatrician for fevers above 100.4°F (38°C) in infants under 3 months.