I think answer is A. The Brightness of a Star
The answer will be D. Solid
This is due to solids having little movement/vibrations allowing for the particles to be compact. They don't get to have much freedom.
Most to least will
Answer:
(a) 5142.86 m
(b) 317.5 m/s
(c) 49.3 degree C
Explanation:
m = 100 kg, Q = 1200 kcal = 1200 x 1000 x 4.2 = 504 x 10^4 J
(a) Let the altitude be h
Q = m x g x h
504 x 10^4 = 100 x 9.8 x h
h = 5142.86 m
(b) Let v be the speed
Q = 1/2 m v^2
504 x 10^4 = 1/2 x 100 x v^2
v = 317.5 m/s
(c) The temperature of normal human body, T1 = 37 degree C
Let the final temperature is T2.
Q = m x c x (T2 - T1)
504 x 10^4 = 100 x 4.1 x 1000 x (T2 - 37)
T2 = 49.3 degree C
Answer:
50 Ohms
Explanation:
Given that
the original resistance of the wire is 2 ohms, then
it is known that the equivalent resistance in a parallel circuit is
1/R(eq) = 1/R1 + 1/R2 + 1/R3 + 1/R4 + 1/R5.......+ 1/Rn
Giving that there are 5 pieces, then we stop at number 5.
Since R(eq) is 2, we substitute for that, and then we have
1/2 = 1/R + 1/R + 1/R + 1/R + 1/R
1/2 = 5/R
R = 5 * 2
R = 10 ohms
Since each R is 10 ohms, and the wire was cut into 5 pieces, we can then say that the original resistance of the wire is
R + R + R + R + R
10 + 10 + 10 + 10 + 10
total original resistance is 50 Ohms