A. The Sun is the only star in the Solar System. This is the only star we know of.
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Answer:
Explanation:
1 ) Let the initial horizontal velocity of car be v .
For vertical displacement
vertical displacement h = 21.3 - 2.3 = 19 m
Time taken to fall by 19 m be t
19 = 1/2 x 9.8 t² ( initial downward velocity is zero )
t = 1.97 s
This is also the time taken to cover horizontal displacement of 54 m which is width of river .
horizontal speed v = 54 / 1.97 m /s
v = 27.41 m /s
2 )
At the time of landing on other side , car will have both vertical and horizontal speed .
vertical speed
v = u + gt
= 0 + 9.8 x 1.97 = 19.31 m /s
horizontal speed will remain same as the initial speed = 27.41 m /s
Resultant speed = √ ( 27.41² + 19.31² )
= √ ( 751.3 + 372.87)
= 33.52 m /s
Answer:
Dimitri Mendeleev
Explanation:
This man started the development of the periodic table, by arranging elements by atomic mass.
The force exerted by each team is 30 N. The forces are in the direction opposite to each other.
Force exerted by team 1, 
Force exerted by team 2,
Net force, 
Therefore, net force on the rope is 0 N.
