<u>Answer:
</u>
Earth convection occurs at the mantle layer
<u>Explanation:
</u>
The movement of less dense material above the more dense material is called as convection. The mantle is the layer that lies between the core and the crust of the earth. The mantle is composed of rocks containing silicon, magnesium, oxygen, aluminium, iron and other minerals.
The heat energy of the core is transmitted to the rock in the lower mantle. This makes the rock with less temperature that lies in upper mantle to move down slowly. Now the rocks that are pushed up is eventually cooled and again pushed down by the hotter rock from the lower mantle. This is called as convection in earth’s mantle .
Completed question:Suppose one speaker is driven at 570 Hz and the other at 554 Hz. What is the beat frequency in Hz? The average frequency in Hz?
Answer:
Beat frequency= 16Hz
Average frequency = 562Hz
Explanation:
Beat frequency f = f2-f1
Where f2 is frequency of source with higher frequency
f1 is frequency of source with lower frequency
f1= 554Hz, f2= 570Hz
beat frequency (f) = 570 -554
= 16Hz
Average frequency =
=
Answer:
B and D
Explanation
Gravitational potential energy does not relate to graphs and it is about a moving object so b and d would not be correct
Complete Question
A Jaguar XK8 convertible has an eight-cylinder engine. At the beginning of its compression stroke, one of the cylinders contains 499cm3 of air at atmospheric pressure (1.01×105Pa) and a temperature of 27.0∘C. At the end of the stroke, the air has been compressed to a volume of 46.2cm3 and the gauge pressure has increased to 2.72×106Pa. Compute the final temperature.
Answer:
The final temperature is
Explanation:
From the question we are given
The volume of one of the cylinders is
The atmospheric pressure is
The temperature is
Volume at the end of the stroke is
The increased pressure is
Now to obtain the temperature we are going to apply the ideal gas equation to this question and this is mathematically given as
Where P is the pressure , V sis the volume T is the temperature
While is the rate constant and n is the number of mole which is constant in this question hence
=>
Making the subject of the formula we have
Therefore
Answer:
8.90 x 10^-3
Explanation:
8.90 x 10^-3
It has to be 10^-3 (ten to the negative three) because when you move the decimal back to it's proper place you are moving it to the left.
and it has to be 8.90 because you have to observe correct sig figs. The 0 at the end of the number is significant because it is at the end of the number AND to the right of the decimal point.