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allochka39001 [22]
3 years ago
7

The chemical symbol H represents which of the following elements?

Physics
2 answers:
olga55 [171]3 years ago
7 0
Answer:
Hydrogen

Explanation:
Helen [10]3 years ago
6 0

Answer:

Hydrogen

Explanation:

Hydrogen is a chemical element with chemical symbol H and atomic number 1. It also has an atomic weight of 1.008 u

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Help please, what does gravitational force do according to these answer choices?
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the answer is C

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A 215-kg merry-go-round in the shape of a uniform, solid, horizontal disk of radius 1.50 m is set in motion by wrapping a rope a
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Answer:

303.9481875 N

Explanation:

t = Time taken = 2 seconds

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Angular acceleration

\alpha=\frac{\omega}{t}\\\Rightarrow \alpha=\frac{3.76991}{2}\\\Rightarrow \alpha=1.88495\ rad/s^2

I=\frac{1}{2}mr^2\\\Rightarrow I=\frac{1}{2}215\times 1.5^2\\\Rightarrow I=241.875\ kgm^2

F=\frac{I\times \alpha}{r}\\\Rightarrow F=\frac{241.875\times 1.88495}{1.5}\\\Rightarrow F=303.9481875\ N

The magnitude of the force to stop the merry-go-round is 303.9481875 N

3 0
3 years ago
Determine whether each of the following is exothermic or endothermic and indicate the sign of δh. A. Natural gas burning on a st
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