Physics
A rocket is fired vertically with a speed of 5 km s^-1 from the earth’s surface. How far from the earth does the rocket go before returning to the earth?
20
Sep
A rocket is fired vertically with a speed of 5 km s^-1 from the earth’s surface. How far from the earth does the rocket go before returning to the earth? A rocket is fired vertically with a speed of 5 km s^-1 from the earth's surface. How far from the earth does the rocket go [...]
The weight of a body on the surface of earth is 63 N. what is the gravitational force on it due to the earth at a height equal to half the radius of earth ?
20
Sep
The weight of a body on the surface of earth is 63 N. what is the gravitational force on it due to the earth at a height equal to half the radius of earth ? The weight of a body on the surface of earth is 63 N. what is the gravitational force on it [...]
A saturn year is 29.5 times the earth year. How far is the saturn from the sun if the earth is 1.50×10^8km away from the sun ?
19
Sep
A saturn year is 29.5 times the earth year. How far is the saturn from the sun if the earth is 1.50×10^8km away from the sun ? A saturn year is 29.5 times the earth year. How far is the saturn from the sun if the earth is 1.50×10^8km away from the sun ? September [...]
How will you ‘weigh the sun’, that is estimate its mass? The mean orbital radius of the earth around the sun is 1.5×10^8 km.
19
Sep
How will you ‘weigh the sun’, that is estimate its mass? The mean orbital radius of the earth around the sun is 1.5×10^8 km. How will you 'weigh the sun' that is estimate its mass? The mean orbital radius of the earth around the sun is 1.5×10^8 km. September 19, 2020 Category: Chapter 7 - [...]
A rocket is fired from the Earth towards the Sun. At what distance from the Earth’s center, the gravitational force on the rocket is zero? Mass of the Sun = 2 × 10^30kg and mass of the Earth = 6 × 10^24kg.
19
Sep
A rocket is fired from the Earth towards the Sun. At what distance from the Earth’s center, the gravitational force on the rocket is zero? Mass of the Sun = 2 × 10^30kg and mass of the Earth = 6 × 10^24kg. A rocket is fired from the Earth towards the Sun. At what distance [...]
Choose the correct answer from among the given ones: The gravitational intensity at the centre of a hemispherical shell of uniform mass density has the direction indicated by the arrow
19
Sep
Choose the correct answer from among the given ones: The gravitational intensity at the centre of a hemispherical shell of uniform mass density has the direction indicated by the arrow Choose the correct answer from among the given ones: The gravitational intensity at the centre of a hemispherical shell of uniform mass density has the [...]
A comet orbits the sun in a highly elliptical orbit. Does the comet have a constant (a) Linear speed, (b) angular speed, (c) Angular momentum, (d) Kinetic energy, (e) potential energy, (f) total energy throughout its orbit? Neglect any mass loss of the comet when it comes very close to the Sun.
19
Sep
A comet orbits the sun in a highly elliptical orbit. Does the comet have a constant (a) Linear speed, (b) angular speed, (c) Angular momentum, (d) Kinetic energy, (e) potential energy, (f) total energy throughout its orbit? Neglect any mass loss of the comet when it comes very close to the Sun. (b) angular speed [...]
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(b) angular speed ,
(c) Angular momentum ,
(d) Kinetic energy ,
(e) potential energy ,
(f) total energy throughout its orbit? Neglect any mass loss of the comet when it comes very close to the Sun. ,
A comet orbits the sun in a highly elliptical orbit. Does the comet have a constant (a) Linear speed ,
Let us assume that our galaxy consists of 2.5×10^11 stars each of one solar mass. How long will a star at a distance of 50,000 light year from the galactic centre take to complete one revolution ? Take the diameter of the Milky Way to be 10^5 light years.
19
Sep
Let us assume that our galaxy consists of 2.5×10^11 stars each of one solar mass. How long will a star at a distance of 50,000 light year from the galactic centre take to complete one revolution ? Take the diameter of the Milky Way to be 10^5 light years. 000 light year from the galactic [...]
One of the satellites of Jupiter has an orbital period of 1.769 days and the radius of the orbit is 4.22×10^8 m. Show that the mass of Jupiter is about one-thousandth that of the sun.
19
Sep
One of the satellites of Jupiter has an orbital period of 1.769 days and the radius of the orbit is 4.22×10^8 m. Show that the mass of Jupiter is about one-thousandth that of the sun. One of the satellites of Jupiter has an orbital period of 1.769 days and the radius of the orbit is [...]
Suppose there existed a planet that went around the sun twice as fast as the earth. What would be its orbital size as compared to that of the earth ?
19
Sep
Suppose there existed a planet that went around the sun twice as fast as the earth. What would be its orbital size as compared to that of the earth ? Suppose there existed a planet that went around the sun twice as fast as the earth. What would be its orbital size as compared to [...]