Which description best explains how a doppler radar system works?
a. it reflects waves off of objects, measuring the difference of the waves it sends and receives.
b. it sends out a set of waves where each wave is pre-programmed to detect a certain kind of object.
c. it uses an antenna to measure the angle between two or more objects in distant space.
d. it uses the doppler effect to raise the pitch of sound waves so objects in distant space can be heard.

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