A seismologist plots the variation in velocity of P and Swaves in different layers of the Earth during an earthquake. The information is shown in the grap 15
P waves
(km/s)
Speed
S waves
Crust
16Mantle
Outer core
Inner
core
0
0
1,000
2,000
3,000
4,000
5,000
6,000
Depth (km)
What can be concluded from the graph?
The layers of Earth have different densities.
P and Swaves are absorbed in the core.
The layers of Earth do not have distinct boundaries.
Pand S waves always originate in the mantle and travel through the core.

Newton's law of cooling states that the rate of change in the temperature t(t) of a body is proportional to the difference between the temperature of the medium m(t) and the temperature of the body. that is, startfraction dt over dt endfraction equals upper k left bracket upper m left parenthesis t right parenthesis minus upper t left parenthesis t right parenthesis right bracket , where k is a constant. let kequals0.04 left parenthesis min right parenthesis superscript negative 1 and the temperature of the medium be constant, m(t) font size decreased by 3 equivalent font size decreased by 3 294 kelvins. if the body is initially at 369 kelvins, use euler's method with hequals0.1 min to approximate the temperature of the body after (a) 30 minutes and (b) 60 minutes.