How do you do Numericals in physics class 9 gravitation?
What is gravitation Class 9 very short answer?
Answer: Gravitation is the force of attraction between any two bodies while gravity refers to attraction between any body and the earth.
How do we fall ill notes?
Immediate cause: The organisms that enter our body and causes disease is called immediate cause. For example, virus, bacteria, protozoa etc. surroundings, contaminated food, improper nourishment, poverty, poor standard of living etc. Diseases may be due to infectious and non-infectious causes.
What is the meaning of GF in physics?
The gram-force is a metric unit of the measurement of force (gf). The gram-force is equal to a mass of one gram multiplied by the standard acceleration due to gravity on Earth’s surface, which is defined as roughly 9.8m/s2.
What is the value of g?
The acceleration due to gravity on Earth or the value of g on Earth is 9.8 m/s2.
What is the value of capital g?
The value of G is (6.6743 ± 0.00015) × 10−11 m3 kg−1 s−2.
What is the mass of moon Class 9?
The mass of the moon is 7.35×1022kg. Thus, the value of g on moon is g=1.625 m/s2.
What is the SI unit of gravitation?
Now, the gravitational force is another type of force. So, the SI unit of gravitational force will be the same as the SI unit of force which is N (newton). And, the SI unit of mass is kg. Note: The gravitational force between two objects of mass Mand m separated at a distance r, is F=GMmr2.
What is the SI unit of gravity?
The unit of gravity is the same as the unit of force, i.e., Newton (N).
What are the 3 equations of gravitation?
- Vout = -GM / r.
- Vsurface = -GM / R.
- Vin = -GM / R.
- g = GM / R²
- ginside ≈ g.
- goutside ≈ g.
Why do we fall ill?
Answer: This is because the immune system of our body is normally fighting off microbes. Our body have cells that are specialised in killing infecting microbes. Whenever any microbes or foreign body enters our system, these cells become active and kill the microbes that could cause any damage to the body.
Is weight a force?
Weight is a force that acts at all times on all objects near Earth. The Earth pulls on all objects with a force of gravity downward toward the center of the Earth.
What is the small value of g?
Its value is 9.8 m/s2 on Earth. That is to say, the acceleration of gravity on the surface of the earth at sea level is 9.8 m/s2.
What is disease Class 9?
What is Disease? “A disease is a condition that deteriorates the normal functioning of the cells, tissues, and organs.” Diseases are often thought of as medical conditions that are characterized by their signs and symptoms.
What causes wind class 9?
Answer: Winds are caused due to unequal heating of atmospheric air. This phenomena can be easily seen near coastal regions during the daytime. The air above the land gets heated faster and starts rising. As this air rises, a region Of low pressure is created and air over the sea moves into this area Of low pressure.
What is health class 9?
Health is a state of complete physical mental and social well being. Its not only the absence of disease. A person is said to be healthy when he/she is free of any type of disease (infectious/deficiency), when he/she is mentally happy and healthy and when his/her social relationships are healthy in a society.
What is the value of 1 kgf?
That is, it is the weight of a kilogram under standard gravity. Therefore, one kilogram-force is by definition equal to 9.80665 N.
What is the value of 1 dyne?
dyne, unit of force in the centimetre-gram-second system of physical units, equal to the force that would give a free mass of one gram an acceleration of one centimetre per second per second. One dyne equals 0.00001 newton.
What is K value?
The K value, also called the bending limit, of a cyclotron is the ratio between achievable energy and the charge-to-mass ratio according to. , where. is the kinetic energy of the particle, the atomic mass number and. the charge.
What is E value?
Euler’s Number ‘e’ is a numerical constant used in mathematical calculations. The value of e is 2.718281828459045…so on. Just like pi(π), e is also an irrational number.
Is Big g constant?
Newton’s gravitational constant Big G is not a constant. Today, the constancy of Newton’s gravitational constant Big G is a constituting part of Einstein’s theory of general relativity.
What is the 9.8 m s2?
9.8 m/s2. 9.8 m/s2 is the acceleration due to gravity near the Earth’s surface. Nearly everything in our lives happens near the Earth’s surface, so that value gets used a lot, and is written as a little g: g = 9.8 m/s2.
Why is G called universal constant?
Universal gravitational constant, G is independent of the nature of the particle, medium between the particles, and time. Its value is constant anywhere in the Universe, and hence it’s called ‘Universal’.
How much is 50 kg on the moon?
Answer: The weight of an object on the moon is 1/6th of that of its weight on earth, since the mass of the moon is a lot less than that of earth. So, the weight of an object of mass 50 kg would be 500 N (taking g = 10 m/s) and on the moon would be 83.3 N (500 6). So, the weight would always be less on the moon.