Answer:
16.82 kJ/g
Explanation:
The Heat energy generated by the pentance combusion caused the temperature increasing of the caloriemeter and the water inside it.
Heat energy of a substace can be calculated using
Q = mcθ
C= mc
where Q = Heat energy
m =mass
c = specific heat capacity
C = heat capacity
θ =temperature difference
(Temperature difference = final temperature - initial temperature.)
heat absorbed by water = mcθ
= 1 * 4.184 * (22.82-20.22)
= 10.88 J --------------(1)
heat absorbed by calorimeter = Cθ
= 2210 *(22.82-20.22)
= 5746 J ---------------(2)
Combustion energy = heat absorbed by water + heat absorbed by calorimeter
Combustion energy = 10.88+ 5746 = 5756.88 J
= 5.757 kJ
heat of combustion of pentane = Combustion energy / mass
= 5.757 / 0.3423
= 16.82 kJ/g
Answer:
Each jump covers one center of the square to the other. If you can imagine the scenario, a single jump would cover a length of the side of one whole square. So, if it took three jumps, the total distance would be
d = 3 * 5 cm
d = 15 cm
Therefore, the magnitude or distance is 15 cm. The displacement depends on the direction of motion.
<u>A hot stop</u> is the feature that <span>may form in an intraplate area over a rising plume of hot mantle material.
According to a dictionary, this is the definition of a hot spot:
</span>A place deep within the Earth where hot<span> magma rises to just underneath the surface, creating a bulge and volcanic activity.</span>
Answer:
about 761 mph
Explanation:
If we consider the atmosphere on a standard day at sea level static conditions, the speed of sound is about 761 mph, or 1100 feet/second
