GK: Class 12 General Q&A · Page 85
3,658 free answers on GK (General) for Class 12 students, across CBSE, ICSE and State boards.
Question & Answer
Questions
- GeneralClass 12All
Q: What is the mass of a 50kg person?
The mass of a 50 kg person is 50 kilograms. This represents the total amount of matter in their body and stays constant everywhere. Their weight on Earth would be approximately 490 Newtons.
- GeneralClass 12All
Q: What is 75 kg in weight?
A mass of 75 kg corresponds to a weight of approximately 735 Newtons on Earth (75 kg × 9.8 m/s²). In everyday language, people say "75 kg weight," but scientifically, 75 kg is the mass, and 735 N is the weight.
- GeneralClass 12All
Q: What is 72 kg in weight?
A mass of 72 kg equals a weight of approximately 706 Newtons on Earth (72 kg × 9.8 m/s²). In practical terms, a person with 72 kg mass would experience this amount of gravitational force pulling them downward.
- GeneralClass 12All
Q: What is 70 kg in weight?
A 70 kg mass corresponds to a weight of approximately 686 Newtons on Earth. This is calculated by multiplying mass by gravitational acceleration (70 kg × 9.8 m/s² = 686 N).
- GeneralClass 12All
Q: How to calculate weight in kg?
Weight is properly measured in Newtons, not kilograms. However, if you want to find the mass (commonly called "weight") in kg: Use a scale that displays kg If you have weight in Newtons: Mass (kg) = Weight (N) ÷ 9.8 Remember, when people say "weight in kg," they usually mean mass.
- GeneralClass 12All
Q: What is 5kg in weight?
A 5 kg mass has a weight of approximately 49 Newtons on Earth (5 kg × 9.8 m/s²). In everyday usage, we say an object "weighs 5 kg," but scientifically its weight is 49 N and its mass is 5 kg.
- GeneralClass 12All
Q: What is 3 kg in mass?
3 kg is mass. The question contains the answer - 3 kilograms is a measurement of mass. On Earth, this 3 kg mass would have a weight of approximately 29.4 Newtons.
- GeneralClass 12All
Q: What is 500g mass to weight?
A 500g (0.5 kg) mass has a weight of approximately 4.9 Newtons on Earth (0.5 kg × 9.8 m/s²). In everyday terms, something with 500g mass is commonly said to "weigh half a kilogram."
- GeneralClass 12All
Q: What is 200 grams in weight?
A 200-gram (0.2 kg) mass has a weight of approximately 1.96 Newtons on Earth. In practical use, we'd say it "weighs 200 grams," though technically weight should be expressed in Newtons.
- GeneralClass 12All
Q: Is 80kg mass or weight?
80 kg is mass. While people commonly say "I weigh 80 kg," kilograms measure mass, not weight. Weight should be measured in Newtons and would be approximately 784 N on Earth for an 80 kg mass.
- GeneralClass 12All
Q: Is 50 kg weight or mass?
50 kg is mass. Though colloquially used to describe weight, kilograms are a unit of mass. The corresponding weight on Earth would be approximately 490 Newtons.
- GeneralClass 12All
Q: Is 32 kg in weight?
32 kg is a measurement of mass, not weight. The actual weight of a 32 kg mass on Earth is approximately 314 Newtons. The confusion arises from everyday language where "weight" and "mass" are used interchangeably.
- GeneralClass 12All
Q: Am I fat if I weigh 60 kg?
60 kg is not inherently "fat" - it depends entirely on your height and body composition. For example: At 150 cm tall: BMI ≈ 26.7 (slightly overweight) At 165 cm tall: BMI ≈ 22.0 (healthy) At 180 cm tall: BMI ≈ 18.5 (lower end of healthy) Focus on overall health, fitness, and how you feel rather than a single number.
- GeneralClass 12All
Q: How old is a 50 kg girl?
Age cannot be determined from mass alone. A 50 kg girl could be: 10-12 years old (taller/average height) 13-16 years old (average/shorter height) An adult (shorter stature) Mass varies greatly based on height, genetics, and individual development, not just age.
- GeneralClass 12All
Q: What is BMI for age?
BMI-for-age is a growth chart used for children and teens (ages 2-20) that plots Body Mass Index against age to assess healthy development. Unlike adult BMI, it uses percentiles: Below 5th percentile: Underweight 5th-85th percentile: Healthy weight 85th-95th percentile: Overweight Above 95th percentile: Obese It accounts for normal growth patterns and gender differe
- GeneralClass 12All
Q: What is the mass of the Earth is 5976000000000000000000000?
The mass of Earth is approximately 5.976 × 10²⁴ kg (5,976,000,000,000,000,000,000,000 kg or about 6 × 10²⁴ kg). This enormous number is more conveniently written in scientific notation. The Earth's mass has been calculated using gravitational measurements and remains constant.
- GeneralClass 12All
Q: Is the mass of the moon 7.4 x10^22?
Yes, the Moon's mass is approximately 7.34 × 10²² kg (or 7.4 × 10²² kg rounded). This is about 1/81 the mass of Earth, which explains why the Moon's gravity is much weaker than Earth's.
- GeneralClass 12All
Is the mass of Earth 6 × 10^24?
Yes, 6 × 10²⁴ kg is the commonly used approximation for Earth's mass. More precisely, it's 5.972 × 10²⁴ kg. This scientific notation makes the number manageable and is standard in physics and astronomy.
- GeneralClass 12All
Whose mass is 9.1 × 10?
An object with mass 9.1 × 10⁻³¹ kg is an electron, one of the fundamental particles of matter. If you meant a different exponent, please note that 9.1 × 10 kg alone is just 91 kg, which could be a typical human mass.
- GeneralClass 12All
How much mass is in a planet?
Planetary masses vary enormously: Mercury: 3.3 × 10²³ kg Earth: 6.0 × 10²⁴ kg Jupiter: 1.9 × 10²⁷ kg (largest planet) Mars: 6.4 × 10²³ kg Jupiter alone contains more mass than all other planets combined, while Earth is the largest terrestrial planet.