Which of the following solid fuels has the highest heating value?

Physics

2 answers:

Amanda [17]4 years ago

5 0

I think it's A.. could be wrong tho.

AleksandrR [38]4 years ago

3 0

Bituminous coal is the right answer.

You might be interested in

Example of an incompressible fluid????

Vlada [557]

"Same fluid can behave as compressible and incompressible depending upon flow conditions. ... The most common example of compressible flow concerns is the flow of gases (at low velocities), while the flow of liquids may frequently be treated as incompressible(under low pressure)." -Google

7 0

4 years ago

Read 2 more answers

The security alarm on a parked car goes off and produces a frequency of 960 Hz. The speed of sound is 343 m/s. As you drive towa

Greeley [361]

Answer: $13.4\ m/s$

Explanation:

Given

The frequency of the source is $f_o=960\ Hz$

Change in frequency is $75\ Hz$

Speed of sound $c=343\ m/s$

Suppose $v$ is the velocity of the observer

Doppler frequency is given by

$f'=f_o\left(\dfrac{c\pm v_o}{c\pm v_s}\right)$

Here, the source is at rest

While approaching source, frequency is

$f_1=f_o\left(\dfrac{c+v}{c}\right)\quad \ldots(i)$

While leaving, frequency is

$f_2=f_o\left(\dfrac{c-v}{c}\right)\quad \ldots(ii)$

The difference in the frequency is

$\Rightarrow f_1-f_2=75\\\\\Rightarrow f_o\left(\dfrac{c+v}{c}\right)-f_o\left(\dfrac{c-v}{c}\right)=75\\\\\Rightarrow f_o\left(\dfrac{2v}{c}\right)=75\\\\\Rightarrow v=\dfrac{75\times 343}{2\times 960}\\\\\Rightarrow v=13.39\approx 13.4\ m/s$