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3 years ago

Who invented abstract geometry

Physics

2 answers:

Brrunno [24]3 years ago

6 0

Wassily Kandinsky invented abstract geometry :) have a good week

tamaranim1 [39]3 years ago

5 0

Invented abstract geometry ~ Thales

Explained the principle of the lever ~ Archimedes

Developed formal logic ~ Aristotle

Developed a model of the universe with the Earth at the center ~ Ptolemy

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A 12-kg projectile is launched with an initial vertical speed of 20 m/s. It rises to a maximum height of 18 m above the launch p

kirill115 [55]

Answer:

Change in mechanical energy, $\Delta E=283.2\ J$

Explanation:

It is given that,

Mass of the projectile, m = 12 kg

Speed of the projectile, v = 20 m/s

Maximum height, h = 18 m

Initially, the projectile have only kinetic energy. it is given by :

$K=\dfrac{1}{2}mv^2$

$K=\dfrac{1}{2}\times 12\ kg\times (20\ m/s)^2$

K = 2400 J

Finally, it have only potential energy. it is given by :

P = mgh

$P=12\ kg\times 9.8\ m/s^2\times 18\ m$

P =2116.8 J

The change in mechanical energy is given by :

$\Delta E=K-P$

$\Delta E=2400-2116.8$

$\Delta E=283.2\ J$

So, the change in mechanical energy is 283.2 J. Hence, this is the required solution.

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3 years ago

A scientist adds different amounts of salt to 5 bottles of water. She then measures how long it takes for the water to boil. Wha

postnew [5]

Answer:

the responding variable is the water boiling

Explanation:

a responding variable is the same thing as a dependent variable and an independent variable you change the independent variable is the amount of salt, the control group is how long water takes to boil without adding salt, and a constant is the same amount of water

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1.53 meters per second

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Explanation:

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