<u>Given</u> :
- Amount = 20 kg
- Heat energy absorbed = 237,000 J
- Temperature change = 15 °C
<u>Formula applied</u> :
- Q = absorbed heat
- m = mass
- c = specific heat capacity
- ΔT = temperature change
Let's solve for c !
⇒ 237,000 = 20 × c × 15
⇒ c = 237,000 ÷ 300
⇒
∴ The specific heat capacity of granite is <u>790 J kg⁻¹ K⁻¹</u>.
Answer:
Sep by step to determine the mass of 25 mL of orange juice
Explanation:
Measure mass of container , then add 25 mL of OJ and subtract the difference
Answer:
Lithium-7
Explanation:
By carefully inspecting the diagram we can see three different sub-particles.
1) Electrons (-vely charged, outside the nucleus)
2) Protons (+vely charged, Inside nucleus)
3) Neutrons (uncharged, Inside nucleus)
Mass Number:
Mass number is the number of protons and neutrons present in the nucleus of an atom.
Therefore, in our problem there are 4 neutrons and 3 protons.
So, the mass number is 7.
Atomic Number:
Atomic number is the number of protons present in the nucleus. This number shows the identity of an atom. If you go through the periodic table you will find that the atomic number 3 is for Lithium.
Result:
Lithium-7
The idea that synthetic items are bad can be correct but not in all situations. Synthetic items have been made to make life easier.