Answer:
the cloth is old by 1,844 years
Explanation:
The computation is shown below:
The half-life of C^(14) is 5730 years
Now
=1.210 × 10^-4 years^(-1)
Now


= .000121,
so t = 1844 yrs
hence, the cloth is old by 1,844 years
consider the forward direction as positive and backward direction as negative. hence displacement in froward direction will be taken as positive and displacement in backward direction will be taken as negative.
= displacement in forward direction = 10 meters
= displacement in backward direction = - 5 meters
= net displacement
net displacement is given as
=
+
= 10 + (- 5)
= 5 meters
Since net displacement is positive , and forward is positive direction of motion.
hence the displacement is 5 meters in forward direction.
b)
d₁ = distance traveled in forward direction = 10 meters
d₂ = distance traveled in backward direction = 5 meters
D = total distance traveled
total distance traveled is given as
D = d₁ + d₂
D = 10 + 5
D = 15 meters
Answer:
True
Explanation:
It's a bit hard to explain, so you can watch a youdube video on it or something.
Answer:
7572 m/s
Explanation:
The force between two masses separated by a distance r is given as:

Where F is the attractive force between 2 masses, m1 and m2, r is the distance between the centres of the masses and G is the universal gravitation constant, which is 
The mass of the earth (
) is far greater than the mass of the sputnik (
). Therefore
. The mass of the sputnik is neglected, therefore:

But F is actually centripetal acceleration, a = v²/r
