One rad is a. the amount of radiation that deposits 102 J of ...

[lbcchick]

One rad is
 a. the amount of radiation that deposits 102 J of energy into 1 kg of absorbing material.
  b. the amount of ionizing radiation that will produce 1/3  109 C of electric charge in 1 cm3 of air under standard conditions.
  c. the amount of radiation needed for ionization of an atom.
  d. the amount of radiation needed for dissociation of a molecule.
  e. the amount of radiation that deposits one erg of energy in 1g of material.

Question 2

The Julian calendar, which has 365 days and a leap day every 4 years, was no longer used in Europe after 1582 because
 a. it is slightly inaccurate and after 1600 years of use caused large problems.
  b. leap years are rough on people born on February 29.
  c. people realized that the Roman calendar is better.
  d. it had 13 months, which is unlucky.
  e. none of the above; we still use it.

[onowka]

Answer to Question 1

a

Answer to Question 2

a

[lbcchick]

TYSM

[fatboyy09]

Excellent