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Troyanec [42]
3 years ago
10

The character laying on the ground has just been burnt by a chemical known as potassium hydroxide, made from a potassium atom, a

n oxygen atom, and a hydrogen atom. This means that potassium hydroxide (like most substances) is a _____.
A) Compound
B) Element
C) Proton
D) Electron
Physics
2 answers:
balandron [24]3 years ago
7 0

This means that potassium hydroxide (like most substances) is a <u>"compound".</u>


In chemistry, a compound is a substance that outcomes from a blend of at least two distinctive chemical elements, so that the atoms of the diverse components are held together by chemical bonds that are hard to break. These bonds shape because of the sharing or trade of electron s among the particles. The littlest unbreakable unit of a compound is known as a particle .  

A compound varies from a mixture, in which holding among the particles of the constituent substances does not happen.

romanna [79]3 years ago
6 0
A compound is the substance! The elements are Potassium and hydroxide.
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Explanation:

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A bowling ball with a momentum of 18kg-m/s strikes a stationary bowling pin. After the collision, the ball has a momentum of 13k
Veronika [31]

Answer:

14.98\ \text{kg m/s}

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Explanation:

P_1 = Initial momentum of the pin = 13 kg m/s

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P_2 = Momentum of the ball after hit

55^{\circ} = Angle ball makes with the horizontal after hitting the pin

\theta = Angle the pin makes with the horizotal after getting hit by the ball

Momentum in the x direction

P_i=P_1\cos55^{\circ}+P_2\cos\theta\\\Rightarrow P_2\cos\theta=P_i-P_1\cos55^{\circ}\\\Rightarrow P_2\cos\theta=18-13\cos55^{\circ}\\\Rightarrow P_2\cos\theta=10.54\ \text{kg m/s}

Momentum in the y direction

P_1\sin55=P_2\sin\theta\\\Rightarrow P_2\sin\theta=13\sin55^{\circ}\\\Rightarrow P_2\sin\theta=10.64\ \text{kg m/s}

(P_2\cos\theta)^2+(P_2\sin\theta)^2=P_2^2\\\Rightarrow P_2=\sqrt{10.54^2+10.64^2}\\\Rightarrow P_2=14.98\ \text{kg m/s}

The pin's resultant velocity is 14.98\ \text{kg m/s}

P_2\sin\theta=10.64\\\Rightarrow \theta=sin^{-1}\dfrac{10.64}{14.98}\\\Rightarrow \theta=45.26^{\circ}

The pin's resultant direction is 45.26^{\circ} below the horizontal or to the right.

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