Answer to Question 1
When the Sun first formed 4.6 billion years ago, it is believed to have been about 30 less luminous than it is today. The Sun's luminosity increased slowly at first and then more rapidly as the buildup of helium in its core continued. At present, the Sun is thought to be brightening by about 1 every hundred million years.
Answer to Question 2
Stratosphere ozone is important to living organisms because it absorbs many of the Sun's harmful ultraviolet rays. Ultraviolet radiation causes skin cancer and other health problems in humans.
To examine a child’s ear, the pinna should be pulled back and up for children over 3 years; the pinn
Acromegaly. Acromegaly is a metabolic disorder in which excessive amounts of growth hormone are secr
On March 25, 1911, as scores of young factory girls leaped to their deaths from the eighth, ninth, a
Adults in the middle-aged group (37–42 years) score higher on measures of generativity than either ...
What rate, compounded once every 3 years, is equivalent to 9% effective rate?
Charlie Stone wants to retire in 30 years, and he wants to have an annuity of $1000 a year for ...