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adoni [48]
3 years ago
5

15) A shell fossil with only 25% of its carbon 14 isotope remaining is MOST LIKELY how many years old? A) 2865 B) 5730 C) 11460

D) 22920
Physics
1 answer:
DIA [1.3K]3 years ago
5 0
I think its 5730 i could be wrong
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What is the wavelength of an electromagnetic wave
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Difference between series and parallel circuits
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Explain how Newton's third law is applied when a rocket ship is being launched?
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An impala is an African antelope capable of a remarkable vertical leap. In one recorded leap, a 45 kg impala went into a deep cr
Elis [28]

Answer:

(a) F = 1500 N.

(b) Ratio force to the antelepe's weight = 3.40

Explanation:

Force : This can be defined as the product of mass and the distance moved by a body. Its S.I unit is Newton. It can be represented mathematically as

F = Ma

Where F= force, M = mass (Kg) and a = Acceleration (m/s²)

Weight: This can be defined as the force on a body due to gravitation field. It is also measured in Newton (N). It can be represented mathematically as

W = Mg

Where W = weight of the body, M = mass of the body (Kg), g = Acceleration due to gravity.

(a)

F = Ma

Where M = 45kg,

a = unknown.

But we can look for acceleration Using one of the equation of motion,

v² = u² + 2gs

Where v= final velocity(m/s), u = initial velocity (m/s) g = 0 m/s, g = 9.8m/s² and s = height = 2.5m.

∴ v² = 2gs

 v = √2gs = √(2×9.8×2.5)

v= √49 = 7m/s

With the force applied, the impala’s velocity must increase from 0 m/s to 7 m/s in 0.21 second

∴ a = (v-u)/t

 a = (7-0)/0.21 = 7/0.21

  a = 33.33 m/s².

F = 45 × 33.33 ≈ 1500

F = 1500 N.

(b)

Where F = Force = 1500 N

and W = Weight = Mg = 45 × 9.8 = 441 N

∴Ratio force to the antelepe's weight = F/W = 1500/441 = 3.40

 Ratio force to the antelepe's weight = 3.40

4 0
3 years ago
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