Answer:
A person sings into a microphone.
Sound is converted to an electrical signal
The electric signal creates a magnetic code.
A magnetic code is transferred to a medium such as a tape or ...
Explanation:
High density medium to low density medium.
Answer:
Precentage error = 7.23%
Explanation:
The precentage error formula is the useful method for determining precision of your experimental result
It can be calculated using :
So we get percentage error = 7.23%
Precision means how close the experimental value to the true value or theoretical value
If percentage error is large it means experimental results are deviated and there is need to check mistakes,imprecision in the experiment
If the percentage error is zero it means the experiment is perfectly done without inaccuracy
Answer:
Explanation:
The formula for calculating the enthalpy change of a reaction by using the enthalpies of formation of reactants and products is
2C₄H₁₀ g) + 13O₂(g) ⇌ 8CO₂(g) + 10H₂O(g)
ΔH°f/kJ·mol⁻¹: -125.7 0 -393.5 -241.82
Answer: 2.09g/mL
Explanation:
Mass = 38.88g
Volume of water = 14.8mL
Vol. of water + Vol. of object = 33.4mL
Vol. Of object = 33.4 — 14.8 = 18.6mL
Density = Mass / volume
Density = 38.88 / 18.6
Density = 2.09g/mL