<span>Water at the oceans surface absorbs energy from the sun currents carry this energy to cool regions </span>
The change in kinetic energy was 34 kJ.
<em>Step 1</em>. Calculate the <em>total mass</em>
Total mass = 100 kg + 200 kg = 300 kg
<em>Step 2</em>. Calculate the <em>initial kinetic energy </em>(<em>KE</em>_i)
<em>v</em> = 0
<em>KE</em>_i = ½ <em>mv</em>^2 = ½ × 300 kg × 0^2 = 0
<em>Step 3</em>. Calculate the f<em>inal kinetic energy</em> (<em>KE</em>_f)
<em>KE</em>_f = ½ <em>mv</em>^2 = ½ × 300 kg × [15 m·s^(-1)]^2 = 34 000 kg·m^2s^(-2) = 34 000 J = 34 kJ
<em>Step 4</em>. Calculate the <em>change in kinetic energy
</em>
Δ<em>KE</em> = <em>KE</em>_f - <em>KE</em>_i = 34 kJ – 0 = 34 kJ
Answer,
Add water to dissolve the salt solution.Shake the solution,oil and water are immiscible liquids therefore oil will not dissolve.Put the solution in a separating funnel and leave the solution undisturbed for a few minutes.Water is denser than oil there oil will come to the top.Power the lower layer of water in to a beaker.Boil the water until water turns into vapour leaving the salt behind.
Answer:
Core electrons are the electrons in an atom that are not valence electrons and therefore do not participate in bonding. The number of valence electrons of an element can be determined by the periodic table group of the element
Explanation:
Element is a single substance, while a compound is the chemical combination of two or more elements, and mixture is the physical combination of two or more elements that can easily be reversed to obtain it's previous state.