a) dU=Q-A, so DU=400 J
b) When you decrease heat while increase work and when you increase work while decreasing heat.
c) It takes heat from colder places and releases the heat to warmer places.
d) Because the order there is made by human.
Answer:
3780J
Explanation:
Data obtained from the question include:
M (mass) = 20g
T1 (initial temperature) = 65°C
T2 (final temperature) = 20°C
ΔT (change in temperature) =
T1 — T2 (since we are cooling)
ΔT = 65 — 20 = 45°C
C (specific heat capacity) = 4.2J/g°C
Q (heat) =?
Q = MCΔT
Q = 20 x 4.2 x 45
Q = 3780J
Therefore, the heat transferred is 3780J
Answer:
The answer is False.
Explanation:
The Light is a form of energy ( known as luminous energy ) that can be perceived by the human eye, therefore it allows us to see what surrounds us. Light is an electromagnetic radiation that spreads in the form of spherical waves in any space, consequently, it is not a mechanical wave.
“We have very good evidence that there<span> was a </span>Big Bang, so the universe as ... found that before<span> our universe </span>there<span> was nothing, nothing at all, </span>not<span> even time itself. ... behind the more familiar forms of </span>matter<span> and energy that fill the universe today. ... </span>If<span> we assume inflation is eternal into the past </span>
