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Reika [66]
3 years ago
14

Why are the oldest parts of the ocean floor no older than about 200 million years

Physics
1 answer:
ivann1987 [24]3 years ago
7 0
The reason is because the molecules didnt come togeather around that time 

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5 0
3 years ago
sing a rope that will snap if the tension in it exceeds 361 N, you need to lower a bundle of old roofing material weighing 455 N
yaroslaw [1]

Answer:

a)-2m/s^2

b)27.2m/s

Explanation:

Hello! The first step to solve this problem is to find the mass of the block remembering that the definition of weight force is mass by gravity (g=9.8m / s ^ 2)

W=455N=weight

W=mg

W=455N=weight

m=\frac{W}{g} =\frac{455}{9.81}=46.38kg

The second step is to draw the free body diagram of the body (see attached image) and use Newton's second law that states that the sum of the forces is equal to mass by acceleration

a=\frac{T-W}{m} =\frac{361-455}{46.38kg} =-2m/s^2

for point b we use the equations of motion with constant acceleration to find the velocity

Vf=\sqrt{X(2)(a)+Vo^2}

Where

Vf = final speed

Vo = Initial speed =0

A = acceleration =2m/s

X = displacement =6.8m

Solving

Vf=\sqrt{(6.8)(2)(2)+0^2}=27.2m/s

4 0
3 years ago
Which do you think will penetrate farther into a block of lead, x-rays, or gamma rays
disa [49]
Gamma rays because it has more penetrating power and frequency but shorter wavelength.
3 0
3 years ago
The earth's magnetic field deflects the flow of current from?
alexgriva [62]
I don't really know the answer but maybe north pole and south pole?
7 0
3 years ago
What type of rock forms most often near an active volcano?
BaLLatris [955]

Extrusive Igneous Rock

3 0
3 years ago
Read 2 more answers
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