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RUDIKE [14]
3 years ago
7

What is the velocity of a plane traveling west if it flies 1575 km in 2.75 hours

Chemistry
1 answer:
dalvyx [7]3 years ago
8 0

Answer:

572.72kmh (after decimal is repeating)

Explanation:

1575/2.75

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Which distinguishes an atom of one element from an atoms of a different element?
dalvyx [7]

Answer:

The number of protons you welcome

Explanation:

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3 years ago
How old are the lunar highlands? 1. 1.8 to 2.6 billion years old 2. 3.1 to 3.8 billion years old 3. 4.0 to 4.3 billion years old
Anastaziya [24]
They are about 4.5 billion years old. Hope this helps.
4 0
4 years ago
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when particles of matter are in direct contact and movement occurs in the substance due to convection, thermal energy transfers
liq [111]

Thermal energy transfers in a solid state, due to convection, in metalic substances.

This is because the covalent bonds between the atoms are being broken and reformed again while the metal is experiencing stress. <em>covalent bonds store energy.  </em>

4 0
3 years ago
Examine the three isotopes of potassium (K) below.
liubo4ka [24]

<u>Answer:</u> The correct answer is Potassium-39, Potassium-40, Potassium-41

<u>Explanation:</u>

Atomic number is defined as the number of protons present in an atom.

Mass number is defined as the sum of number of protons and number of neutrons present in an atom. It is represented as A.

A = Mass number = Number of neutrons + Number of protons.

For the given isotopes of potassium:

Atomic number of potassium is 19.

<u>For potassium-41 isotope:</u>

Mass number = 41

Number of neutrons = 41 - 19 = 22

<u>For potassium-39 isotope:</u>

Mass number = 39

Number of neutrons = 39 - 19 = 20

<u>For potassium-40 isotope:</u>

Mass number = 40

Number of neutrons = 40 - 19 = 21

The most number of neutrons are in potassium-41 isotope and the least number of neutrons are in potassium-39

Hence, the correct answer is Potassium-39, Potassium-40, Potassium-41

6 0
4 years ago
How to solve partial pressure given water vapor pressure?
CaHeK987 [17]
The partial pressure<span> of </span>water<span> in the mixture, P</span>water<span>, is the equilibrium </span>vapour pressure<span> of </span>water<span> at the temperature specified. At 298 K, from the data at the beginning of the questions section, P</span>water<span> = 3.17 kPa. Using the Ideal Gas Equation, the number of moles of N</span>2<span> can be calculated.</span>
6 0
3 years ago
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