Advertisements
Advertisements
प्रश्न
How many astronomical units (A.U.) make 1 parsec?
Advertisements
उत्तर
1 A.U. long arc subtends the angle of 1 s or 1 arc sec at distance of 1 parsec.
Thus, angle 1 sec = `(1 A.U.)/1` parsec
Thus, 1 parsec = `(1 A.U.)/1` arc sec
Thus, 1 parsec = `(630(3600))/11`
= 206182.8
= 2 × 105 A.U.
APPEARS IN
संबंधित प्रश्न
When the planet Jupiter is at a distance of 824.7 million kilometres from the Earth, its angular diameter is measured to be 35.72″ of arc. Calculate the diameter of Jupiter
Write true or false.
Every measurement involves two things – a number and a unit.
What are the S.I. units of
- mass
- length
- time and
- temperature.
Write their names and symbols.
500 gm = ______ kilogram.
Rulers, measuring tapes and metre scales are used to measure ______
Can you find the diameter of a thin wire of length 2 m using the ruler from your instrument box?
Numerical Problem.
Inian and Ezhilan argue about the light year. Inian tells that it is 9.46 × 1015 m and Ezhilan argues that it is 9.46 × 10 12 km. Who is right? Justify your answer.
How many stamps can be placed along its length?
How wide is the rectangle? ________ cm
How close was your earlier guess? Discuss.
You can play this game on the ground. Make two squares of one square meter each. Divide your class into two teams. Ready to play!
- How many of you can stand in it?
There are two beautiful lakes near a village. People come for boating and picnics in both the lakes. The village Panchayat is worried that with the noise of the boats the birds will stop coming. The Panchayat wants motorboats in only one lake. The other lake will be saved for the birds to make their nests.
- How many cm is the length of the boundary of lake A in the drawing?(use thread to find out)
There are two beautiful lakes near a village. People come for boating and picnics in both the lakes. The village Panchayat is worried that with the noise of the boats the birds will stop coming. The Panchayat wants motorboats in only one lake. The other lake will be saved for the birds to make their nests.
- What is the length of the boundary of lake B in the drawing?
In which SI unit, you can measure your height?
What formula is used to measure the area of your classroom?
Give some examples of larger length measures.
What unit will you use to measure the length of our classroom?
What is the SI unit of length?
