The amount of heat needed to increase the temperature of a substance by
is given by
where
m is the mass of the substance
is its specific heat capacity
is the increase of temperature
The sample of silver of our problem has a mass of
. Its specific heat capacity is
and the increase in temperature is
Therefore, the amount of heat needed is
Answer: trees compete for resources directly around them .
Answer:
k_max = 31.82 w/mk
k_min = 17.70 w/mk
Explanation:
a) the maximum thermal conductivity is given as
where k_m is thermal conductvitiy of metal
k_p is thermal conductvitiy of carbide
v_m = proportion of metal in the cement = 0.17
v_p = proportion of carbide in the cement = 0.83
= 66*0.17 + 28*0.83
k_max = 31.82 w/mk
b) the minimum thermal conductivity is given as
= \frac{28+66}{28*0.17 +66*0.83}
k_min = 17.70 w/mk
Answer:
The total time is 
.
Explanation:
Given:
The distance between Galactic Capitol and Earth is, 
The speed of light is, 
The time taken by the message to reach and come back to Earth is given by
In addition they take 1 year to decide to reply.
Thus, the total time is 
.
Answer:
A
Explanation:
I’m not sure but I hope this helped
