3 years ago

You and a friend get to spend a fun summer day at

Physics

1 answer:

Veseljchak [2.6K]3 years ago

7 0

Curved because, if you’ve ever been to a real one, you know when you hit the curve it goes faster usually

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A 5 kg rock is raised 28 m above the ground level. What is the change in its potential energy?

marin [14]

Let's assume that ground level is the height 0 meters. The change in potential energy is going to be gravitational potential energy, which is given by PE=mgh.
ΔPE=mgh-mgy
=mg(h-y)
=50(28-0)
=1400 J

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4 years ago

Protons, neutrons, electrons, and a nucleus are

tatuchka [14]

It would be Atoms, they’re all made up of these tiny particles

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3 years ago

a snail takes 16 minutes 40 seconds to cover a distance of 1 m calculate the average speed of the swimmer

matrenka [14]

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How long must a simple pendulum be if it is to make exactly one swing per four seconds? (That is, one complete oscillation takes

cricket20 [7]

Answer:

Length of the pendulum will be 3.987 m

Explanation:

We have given time period of the pendulum T = 8 sec

Acceleration due to gravity $g=9.81m/sec^2$

We have to find the length of the simple pendulum

We know that time period of the simple pendulum is given by

$T=2\pi \sqrt{\frac{l}{g}}$

$8=2\times 3.14 \sqrt{\frac{l}{9.81}}$

$l=3.987m$

So length of the pendulum will be 3.987 m

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3 years ago

What are two parts of an atom

seraphim [82]

Answer:

Nucleus And electron cloud

Explanation:

Hope this helps

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3 years ago