Answer:
porosity = 0.07 or 7%
dry bulk density = 3.25g/cm3]
water content =
Explanation:
bulk density = dry Mass / volume of sample
dry mass = 0.490kg = 490g
volume = πr2h = 3.142 * 2 *2 *12 = 150.8cm3
density = 490/150.8 = 3.25g/cm3
porosity = =
= 0.07 or 7%
water content = = 7%
Answer:
Explanation:
Heat engine
Heat engine is a device which produce work while consuming some amount of energy .This engine works in cycle.In other words we can say that Heat engine is a device which covert thermal or chemical energy in to mechanical energy and after that this mechanical energy can be use for producing mechanical work.
Heat engine takes heat from high temperature and rejects heat to lower temperature and producing work.
We know that efficiency given as
From diagram we can say that
So efficiency
Answer:
a) 144.000 s
b) and c)Battery voltage and power plots in attached image.
where D:{0<t<40} h
d) 1620 J
Explanation:
a) The first answer is a rule of three
b) Using the line equation with initial point (0 seconds, 1.5 V)
where m is the slope.
where V is voltage in V, and t is time in seconds
and using P and m.
d) Having a count that.
