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Anuta_ua [19.1K]
3 years ago
9

1. The elements in the modern Periodic Table are arranged according to their

Chemistry
1 answer:
Usimov [2.4K]3 years ago
4 0

Answer:

A). Atomic number

Explanation:

THIS IS EASY

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1m/s is the acceleration used.
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A home is heated by a system that uses sunlight to warm water in pipes. Which statement best describes this system?
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Answer:

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2. Calculate the pressure in Pa of a brick, which weighs 40 lbs (178N) sitting flat on the
Aloiza [94]

Answer:

P =  741.7 Pa

Explanation:

Pressure:

It is the force applied on object per unit area. The force is applied perpendicular to the surface.

Mathematical expression:

P = F/A

P = pressure

F = force

A = area

Given data:

Weight = 178 N

Area = 10 cm × 24 cm

Pressure = ?

Solution:

Area = 10 cm × 24 cm

Area = 240 cm²

Area = 240 /10000 = 0.024 m²

Formula:

P = F/A

P = 178 N / 0.024 m²

P = 741.7 Nm⁻²

Nm⁻² = Pa

P =  741.7 Pa

6 0
3 years ago
The atria beat prior to the ventricles. What purpose does this serve?
Zarrin [17]

Answer:

The atria and ventricles work together, alternately contracting and relaxing to pump blood through your heart. The electrical system of your heart is the power source that makes this possible.

Your heartbeat is triggered by electrical impulses that travel down a special pathway through your heart:

Explanation:

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Mixing salt with water is an example of a _________change. *<br> physical change<br> chemical change
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Answer:

physical

Explanation:

no chemical reaction is happening

6 0
3 years ago
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