Question

21.Who discover radio waves?


22.Who invented gramophone?


23.Boilingpoint of water is

24.Solidified carbon dioxide is called?


25.Water at room temperature is a ………


26.The first manned mission to land on the moon was………..


27.Indias first scientific mission to the moon was?


28.Who invented electric bulb and phonograph?


29.This is an instrument used for viewing internal organs of the body?​

Answer 1

Answer:

21. Heinrich Hertz

22. Thomas Edison , Emile Berliner and Charles Cros

23. 100°C

24. Dry ice

25. liquid

26. Apollo 11

27. Chandrayan-1

28. Thomas Edison

29. endoscopes

Hope this will help you!! ☺️

Answer 2

Answer:

1.heinrich Hertz

2.thmos Edison

3. 100°c

4.dry ice is called solid form of carbon dioxide

5.100° degrees and liquid room

6. apollo 11 ( July 16- 24- 1969) was the spaceflight that

first landed humans on the moon .commander Neil Armstrong and lunar module pilot buzz Aldrin formed the American crew that landed the apollo lunar module on July 20 1969 at 20: 17 UTC

7. chandrayaan 1

8. Thomas Alva Edison

9.an endoscope