Specific Heats of Selected Materials Material
C (J/kg-K)
Aluminum
897
Concrete
850
Diamond
509
Glass
840
Helium
5193
Water
4181
Q = mcAT
=
Joanna adds 12,000 J of heat to a 10 kg
sample of concrete which had an initial
temperature of 15°C. What was the final
temperature of the concrete after Joanna
added the thermal energy?
a) 1.4°C
b) 13.6°C
c) 16.4°C
d) 15°C

when a device is used in a circuit in which the voltage is 81 v, the current flowing through the device is 3 a. what is the resistance of the device?

a. 27 ω

b. 40.5 a

c. 243 ω

d. 243 a

the correct answer is a. 27

answer;

d. are made mostly of liquid

explanation;

-the general   composition and structure planets includes; they have a thick gas and liquid layer covering a small,solid core. mostly the gases are hydrogen and helium atmosphere and layers of liquid hydrogen. for instance neptune and uranus are examples of the outer planets, they have a core covered by ice and ammonia.

-neptune's atmosphere is hydrogen and helium with a bit of methane so there is no oxygen to breath and the interior is made up of frozen water and ammonia with a rock and iron core. thus, there is no liquid water or solid surface to survive.