3 years ago

Explain what all John Dalton did in atomic theory

2 answers:

6 0

Dalton's Atomic Theory1) All matter is made of atoms. Atoms are indivisible and indestructible.2) All atoms of a given element are identical in mass and properties3) Compounds are formed by a combination of two or more different kinds of atoms.4) A chemical reaction is a rearrangement of atoms.

Elina [12.6K]3 years ago

6 0

1) All matter is made of atoms. Atoms are indivisible and indestructible.

2) All atoms of a given element are identical in mass and properties

3) Compounds are formed by a combination of two or more different kinds of atoms.

4) A chemical reaction is a rearrangement of atoms.

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Is there a link between the number of bulbs and current drawn from the power pack?

LuckyWell [14K]

Answer:

Yes there is if number of bulb is high the bulbs wouldn't glow much brighter

Explanation:

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3 years ago

The moon's orbit around the Earth will advance in one day: 1° 13° 27° 29°

Sever21 [200]

The moon's orbit around the Earth will advance in one day:

1°
13° correct answer
27°
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4 years ago

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What is the momentum of a 750kg car traculing at a velocity of 24m/s

m_a_m_a [10]

The answer is 18000 kgm/s

Momentum is mass times velocity so just do 750•24.

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3 years ago

A 25 kg child runs at a speed of 5.0 m/s and jumps onto a stationary shopping cart and holds on for dear life. The cart has mass

makkiz [27]

Answer:

3.38 m/s

Explanation:

Mass of child = m₁ = 25

Initial speed of child = u₁ = 5 m/s

Initial speed of cart = u₂ = 0 m/s

Mass of cart = m₂ = 12 kg

Velocity of cart with child on top = v

This is a case of perfectly inelastic collision

$m_1u_1+m_2u_2=(m_1+m_2)v\\\Rightarrow v=\frac{m_1u_1+m_2u_2}{m_1+m_2}\\\Rightarrow v=\frac{25\times 5+12\times 0}{25+12}\\\Rightarrow v=\frac{125}{37}\\\Rightarrow v=3.38\ m/s$

Velocity of cart with child on top is 3.38 m/s

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3 years ago

For two objects with masses 100 kg and 500 kg to be 20 meters apart , find the gravity between them

Vikki [24]

Answer:

8,3375*10^-9 N

Explanation:

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3 years ago