Answer:
Explanation:
a ) The temperature of water increases from 21.3°C to 48.4°C .
b ) Heat flow of water ( q) is positive because there is rise in temperature .
c ) The temperature of metal decreases from 99.3⁰C to 48.4⁰C .
d ) Heat flow of metal is negative because there is fall in temperature .
e ) heat loss of metal = heat gain by water
heat gain by water ( q ) = 50 x 4.2 x ( 48.4 - 21.3 )
= 5691 J
q = 5690 J . ( 3 significant figures )
heat loss of metal = mass x specific heat x fall in temp = 5691
150 x specific heat x ( 99.3 - 48.4 ) = 5691
specific heat = 5691 / (150 x 50.9 )
= .745 J / g C ( three significant figures )
Answer: The energy of the photon is the exact energy that is lost by the electron moving to its lower energy level. When the electron changes from n=3 or above to n=2, the photons emitted fall in the Visible Light region of the spectra
Answer:
317.46 °C
Explanation:
The expression for the calculation of heat is shown below as:-
Where,
is the heat absorbed/released
m is the mass
C is the specific heat capacity
is the temperature change
Thus, given that:-
Mass of lead = 118.5 g
Specific heat = 0.129 J/g°C
Initial temperature = 10 °C
Final temperature = x °C
Q = 4700 J
So,
<u>Thus, the final temperature is:- 317.46 °C</u>
Answer:
The claim is incorrect because the exact position of matter is always visible or can be determined.