Leakage radiation from the x-ray tube cannot exceed which of the following at a distance of one meter?

a. 6.45 x 10-6 coulomb/kg/hr (25 mr/hr)
b. 1.29 x 10-5 coulomb/kg/hr (50 mr/hr)
c. 1.94 x 10-5 coulomb/kg/hr (75 mr/hr)
d. 2.58 x 10-5 coulomb/kg/hr (100 mr/hr)

Which would best keep the oxygen cycle stable? a. cutting down jungles to create farmland b. eliminating parks in large cities c. dumping toxic chemicals into the ocean d. reducing the amount of deforestation d. reducing the amount of deforestation

An example of internal feedback working to maintain homeostasis is your a. decreased respiration rate when you are studying b. decreased heart rate when you are sad c. increased respiration rate when your muscles need more oxygen d. increased heart rate when your lungs need more oxygen

What does natural resource management aim at ?