Answer:
10 KJ
Explanation:
We are told that 4.0kJ of energy is required to raise the temperature of 1.0kg of paraffin by 2.0°C.
Formula for heat energy here is;
Q = mcΔt
Where;
m is mass
c is specific heat capacity
ΔT is change in temperature
Thus;
4 = 1 × c × 2
c = 4/2
c = 2 Kj/Kg°C
The energy required to raise the temperature of 5.0kg of paraffin by 1.0°C would be;
Q_new = 5 × 2 × 1
Q_new = 10 KJ
The diameter of the reflecting surface of spherical mirror is called its aperture. Mirrors whose aperture is much smaller than its radius of curvature, we use R=2f.
The cold air sinks as it is heavier
Answer:
The Gauge pressure at 9 meters depth is
Explanation:
Gauge pressure is the difference between absolute pressure and some reference pressure, most commonly atmospheric pressure. The increment in pressure caused by a static fluid is given by:
where is the density of the liquid, g is the accleration due to gravity and d is the depth.
Now, we see that is linearly proportional to d, and we can assume that remains constant, because liquids are usually not compressible.
Given that the greater depth is simply 3 times the smaller depth:
at of depth will also be three times the gauge pressure at of depth.
We could also have calculated ny using:
and used this result to calculate the gauge pressure. These are both similar methods that yield the same result
Explanation:
scientific laws are totally fixed.
sciebtific theories are not totally accurate.