The mass number of an element is equivalent to the number of Protons and Neutrons in the element. For example Oxygen has eight protons and neutrons, therefore its mass number is 16. You could also calculate this by simply rounding the atomic weight of the element to the nearest whole number. Oxygen's atomic weight is 15.994, which as you can see, would be rounded to 16 :)
lithosphere- rocks and crust, 300 to 500 °C
mantle-silicate rocks rich in magnesium and iron,500 to 900 °C
outer core- iron and nickel, along with small amounts of other dense elements like gold, platinum, and uranium. 4400 to 6100 °C
inner core-iron, 5982°C
Hello! Ahh okay let’s see... I’ve studied this before.
So an example of an open system can be something like living organism such as a human being. We actively interact with our environment, which results in changes to both the environment and us. For example... we eat to acquire energy.
I hope this helps, I tried to give a pretty detailed example. Have a great night!
~Brooke❤️
Because there have been many invasions the correct answer would be C. The invasions would have brought many different ethnic groups into the area.
Answer and Explanation:
The economic challenges related to Pakistani industries are mainly related to the lack of investment, economic sanctions, business disorganization and the lack of effective legislation. This has generated a strong economic regression, which has hampered even the local industries, because the high individuals of inflation, unemployment and lack of quality education have severely reduced the purchasing power of Pakistani consumers. strong international sanctions, have prevented many commercial relations, which has further impacted the economy in the country.
