Big Bang is a theory that, as stated above, has grown to become widely acceptable scientific explanation of the origin of things. Research would say that according to this theory, the Earth originated billion years ago through an explosive of a highly energized point.
Through this explosion, the elements were formed. However, only the lightest of the elements including hydrogen and helium, with traces of lithium and beryllium. From the choices, the answer would have to be the second choice, helium.
Answer: B. helium
50.5cm= 0.00505hm
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Answer:
a) 242.5 m
Explanation:
Given :
Vi= 20m/s
t = 5 seconds
According to kinematic equation, the displacement is given by:
d = Vit + 1/2 gt^2
d = 20 × 6 ) + (1/2 × 9.8 × 5^2)
d = 120 + 122.5
d = 242.5m
Answer:
The speed of projection is 34 m/s.
Explanation:
Height of building, h = 51 m
horizontal distance, d = 74 m
time, t = 8 s
Let the angle is A and the speed is u.
d = u cos A x t
74 = u cos A x 8
u cos A = 9.25 .... (1)
Use second equation of motion
Squaring and adding both the equations