Which sentence best describes how the Earth's densest elements ended up comprising the core. A
The lightest elements tended to float to the exterior forming the crust.

B
The densest elements tended to drift to the center forming the core.

C
The lightest elements floated to the exterior forming the crust and the densest element drifted towards the center forming the core.

D
None of the above.

Which of the choices below is one of the primary gases found in the atmosphere? a. helium b. carbon dioxide c. nitrogen d. argon

What is the average speed of a car that travels 40 mph for 1 hour and 60 mph in another hour?

1.)the isotope cobalt-60 has a nuclear mass of 59.933820 u calculate the mass defect of cobalt-60 using the following information. mass of proton: 1.007825 u mass of neutron: 1.008665 u 1 u = 931.5 mev 2.)the isotope cobalt-60 has a nuclear mass of 59.933820 u calculate the binding energy of cobalt-60 using the following information. mass of proton: 1.007825 u mass of neutron: 1.008665 u 1 u = 931.5 mev 3.)the isotope cobalt-60 has a nuclear mass of 59.933820 u calculate the binding energy per nucleon of cobalt-60 using the following information. mass of proton: 1.007825 u mass of neutron: 1.008665 u 1 u = 931.5 mev