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3 years ago

Part 1. Define the following terminologies

Physics

1 answer:

skelet666 [1.2K]3 years ago

5 0

Answer:

1: Elements are substances that cannot be broken down into more substances.

2: Compounds are a group of elements in a specific ratio.

3: A metalloid is between a metal and a non-metal.

4: A physical property is a property you can see or touch.

5: A chemical property is a property seen in chemical reactions.

6: Alloys are the combination of two or more metals to make a better material.

7: An insulator doesn't let heat and sound escape.

8: Corrosion is when a metal reacts to oxygen, water, or sulfur.

9: Rust is when a metal is exposed to oxygen

Explanation:

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3 years ago

Romeo (81.0 kg) entertains Juliet (53.0 kg) by playing his guitar from the rear of their boat at rest in still water, 2.70 m awa

den301095 [7]

Answer:

0.64 m

Explanation:

The first thing is calculate the center of mass of the system.

$X_{cm}= \sum_{n=1}^{n}\frac{X_n\times M_n}{M_n}$

now multiplying every coordinate x by the mass of each object (romeo, juliet and the boat) and dividing all by the total mass taking by reference the position of juliet.

$X_{cm}=\frac{53\times0 +81\times2.7+79\times1.35}{53+81+79}$

X_cm = 1.4589 m

When the forces involved are internals, the center of mass don't change

After the movement the center of mass remains in the same distance from the shore, but change relative to the rear of the boat.

$X_{cm}=\frac{79\times1.35+(81+53)\times2.7}{53+81+79}$

X_cm= 2.10 m

this displacement is how the boat move toward the shore.

2.10-1.46= 0.64 m

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3 years ago