A one-meter-thick lead plate can provide protection from a, b, ...

[tuffie]

A one-meter-thick lead plate can provide protection from a, b, and radiation.
 
  What will be an ideal response?

Question 2

Sustainability in a resource means
 
  a. ever increasing amounts of the resource.
  b. doubling the amount needed means doubling the amount available.
  c. the amount of the resource grows as the population grows.
  d. production of the same amount of the resource forever.
  e. production of gradually decreasing amounts of the resource.

[johnharpe]

Answer to Question 1

Shielding does help. For this sort of shielding, a and b are completely absorbed.
Gamma radiation takes much more lead A typical radiation length (intensity falls to 1/e) is
about 0.56 cm. A one-meter-thick lead plate provides real protection.

Answer to Question 2

D

[tuffie]

TYSM

[dantucker]

Gracias!