Given:
5 kg
of coal
T1 =
20°C, T2 = 220°C
Required:
Q(heat
energy)
Solution:
The specific
heat of coal (bituminous) is 1.315 kJ/kg-K
Q =
mcp(T2-T1)
Q =
5kg (1.315 kJ/kg-K) (220 – 20)
Note
that T(°C) = T(K)
Q = 1315
kJ or 1315000 J
Since
1315000 J is close to 1314718 J, the
answer is letter <span>A.</span>
Give me a couple minutes this might take a while
Answer:
2.5 m/s
Explanation:
The speed of a wave is given by:
where
f is the frequency
is the wavelength
The wave in this problem hits the beach about every 2.0 seconds: this means that its period is 2.0 s. So the frequency is the reciprocal of the period
The crests are 5.0 m away from each other, so the wavelength is
Therefore, the speed of the wave is
They're called craters.
I actually really like astrology so :)
Well, for name and date you'll put your own name and date. I can't do it for you cause I need to know what you are doing but,I can help. Title of lab put the title,<span>Summary of Research: Just put basically in 2-3 sentences what the research is about.
Purpose/Objectives:Put the purpose like what it does, or what it's supposed to do.
Hypothesis: Then these I can't help without knowing what you are using ;/
Experimental Design:
Independent Variable:
Dependent Variable:
Control Group:
Constants (controlled conditions):
Materials: Just put what it contains.
Procedure: Now, for this just put what you need to do.
Results and Analysis: Then what you get after you do it.
Observations: What you have seen while you been doing this.
Data: just the things you know bout this.
Graph of Results: What it ends up like having.
Analysis Questions: Just questions about the chemicals
Conclusion: Just the ending a couple of sentences about what you've learned the chemicals etc...
Hope this help!
</span>