Fossils in millions of years, as show. fossil contained in layer 1
32
fossil contained in layer 2
96
soil.
These are the
ons in their
the type of
the changes in
nged over
fossil contained in layer 3
?
fossil contained in layer 4
465
fossil contained in layer 5
511
se of time
This means
What is most likely the age of the fossil contained in layer 3?
А.
less than 32 million years
В.
around 490 million years
C
around 611 million years
D
around 250 million years

A47.2 g block of copper whose temperature is 480 k is placed in an insulating box with a 91.8 g block of lead whose temperature is 200 k. (a) what is the equilibrium temperature of the two-block system? (b) what is the change in the internal energy of the two-block system between the initial state and the equilibrium state? (c) what is the change in the entropy of the two-block system? the heat capacities of copper and lead are 386 j/kg·k and 128 j/kg·k, respectively.

Estimate of the number of stars in our galaxy

What would be the net charge of 1 gram gold piece after removal of 1% of its electrons