The Solar System

Q.

What are the first thirty elements?

Q.

Definition of direction

Q.

What are the 25 elements in human body?

Q. Is 50Kg my mass or weight?

Q. Question 16
Calculate the force of gravitation between the earth and the Sun, given that the mass of the earth $=6\times {10}^{24}$ kg and of the Sun $=2\times {10}^{30}$ kg. The average distance between the two is $1.5\times {10}^{11}m$

Q.

What are planets? State any four characteristics of a planet.

Q.

What is the second-largest planet in our solar system?

Q.

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.

Assertion A: Hydrogen is the most abundant element in the Universe, but it is not the most abundant gas in the troposphere.

Reason R: Hydrogen is the lightest element.

In the light of the above statements, choose the correct answer from the given below

1. A is false but R is true

2. Both A and R are true and R is the correct explanation of A

3. A is true but R is false

4. Both A and R are true but R is NOT the correct explanation of A

Q.

What is the most abundant element in the universe?

Q.

Show that the weight of an object on the moon is 1/6 of its weight on the earth.

Q. You find your mass to be 42 kg on a weighing machine . Is your mass more or less than 42kg ?

Q.

A object weight 10N, when measured on the surface of the earth, what would be it's weight measured on the surface of moon . what is the acceleration due to gravity on moon?

Q. Why we can see some dark area on the surface of moon?

Q. A particle weigh 120N on earth surface. At what height above the earth surface will it's weight be 30N? (radius of earth=6400km)

Q.

Calculate the value of acceleration due to gravity on a planet whose mass is 4 times as that of the earth and radius is 3 times as that of the earth.

Q.

Derivation of the weight of an object on the moon is equal to 1/6 th the weight on the earth.

Q. The Indian name of which planet is "Brihaspati"?

1. Saturn
2. Jupiter
3. Pluto
4. Uranus

Q. The planet Pluto is at an average distance of 38.5 a.u from Earth. So, it takes for light to reach Pluto from Earth.

1. 8.785 hr
2. 6.083 hr
3. 5.351 hr

Q.

A person’s mass is measured on the moon and on the Earth. Which statement would be true?

1. The person's mass on Earth would be double of that on the moon.

2. The person's mass on the moon would be twice that on the Earth.

3. The person would have mass on the Earth but no mass on the moon.

4. The mass would be same on the moon and on the Earth.

Q.

What is the difference between an artificial satellite and a space probe.

Q.

Why do people believe in big bang theory? And why it is stated the

Most correct among all of other theories

Q.

The radius of the earth is 6370 km and of mars is 3400 km. If an object of 200 N weighs on earth what will be the weight on mars? The mass of mars is 0.11 that of earth.

Q.

Approximately how many comets are in our solar system?

Q.

The satellites in geostationary orbit are used in telecommunication.

1. True
2. False

Q. If a man weighs 70 kg what will his weight be on moon?

Q. Which of the following statements about the Moon is/are not TRUE?

1. The Moon is about half the size of the Earth.
2. Winds blow slower on the Moon than on Earth.
3. The Moon is a natural satellite of the Earth.
4. Only one side of the Moon is seen from the Earth.

Q.

How does moon form?

Q.

What would be the weight of a body of mass 50 kg on the surface of the moon, where g = 1.6 m/s². What would be its mass?

Q.

The mass of a body on earth is 60 kg, its mass on moon is

1. zero

2. 120 kg

3. 10 kg

4. 60 kg

Q.

What is a blackhole ?