Question
Write a short note.
Escape Velocity
Escape Velocity
✓
Answer
1. The minimum velocity with which a body should be projected from the surface of a planet or moon, so that it escapes from the gravitational influence of the planet or moon is called as escape velocity.
2. Escape velocity is given as, $v_{\text {esc }}=\sqrt{\frac{2 GM }{R}}=\sqrt{2 gR }$, where $M$ is mass of the planet, $R$ is radius of the planet and $g$ is acceleration due to gravity of the planet.
3. The escape velocity is different for different planets.
2. Escape velocity is given as, $v_{\text {esc }}=\sqrt{\frac{2 GM }{R}}=\sqrt{2 gR }$, where $M$ is mass of the planet, $R$ is radius of the planet and $g$ is acceleration due to gravity of the planet.
3. The escape velocity is different for different planets.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Which disasters have you experienced in your area?
Atomic number of metal “A” is 11, while atomic number of metal “B” is 20. Which of them will be more reactive? Write the chemical reaction of dilute HCl with metal “A”.
We sweat during summer and heavy exercise.
If two convex lenses of focal lengths 10 cm and 5 cm are kept in contact with each other, what is their combined focal length?
i. What are vitamins?
ii. Classify them according to their solubility.
iii. Give one example of each type as per above classification.
ii. Classify them according to their solubility.
iii. Give one example of each type as per above classification.
How do nonmetals react with dilute acids?
Observe the diagram and answer the questions :
(a) Which energy is generated from the power plant?
(b) State its source.
(c) Which is more eco-friendly – Power generation from coal or Power generation from natural gas? Why?
(a) Which energy is generated from the power plant?
(b) State its source.
(c) Which is more eco-friendly – Power generation from coal or Power generation from natural gas? Why?
Metals are said to be shiny. Why do metals generally appear to be dull ? How can their brightness be restored?
Name the elements, group, formulae and physical state belonging to the halogen family.
Identify the physical and chemical changes from the following phenomena:
i. Transformation of ice into water.
ii. Ripening of fruit.
iii. Milk turned into curd.
iv. Evaporation of water.
v. Digestion of food in the stomach.
vi. Iron filings get attracted towards the magnet.
i. Transformation of ice into water.
ii. Ripening of fruit.
iii. Milk turned into curd.
iv. Evaporation of water.
v. Digestion of food in the stomach.
vi. Iron filings get attracted towards the magnet.