93.64 grams
Explanation:mass of platinum =number of moles x molar mass molar mass = atomic mass of any element ,0.48 ×195.084 = 93.64 grams
Answer:
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Explanation:
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Explanation:
It is given that,
Length of the poster, l = 0.95 m
Breadth of the poster, b = 1 m
The poster is in the shape of rectangle. For a rectangular shape, perimeter is equal to :
P = 2(l+b)
P=2(0.95+1)
P=3.9 m
(b) One digits, P = 4 m
(c) Two digits, P = 3.9 m
(d) Three digits, P = 3.90 m
Explanation :
First considering Sid's statements, the description of tangential speed and centripetal acceleration are correct.
But for Centripetal force, the description is incorrect because centripetal force is always perpendicular to the velocity.
Sid's error can be corrected by the statement (b) i.e. "Centripetal force is perpendicular to the velocity of the satellite".
Use v^2 - u^2 = 2as
Here, u = 20 m/s , a = -0.5 m/s^2 and v = 0
- 400 = -s ======> s = 400 m
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