If the human body can withstand a maximum of 9720 units of IR rays when exposed to the sun continuously, then what is the maximum time in minutes that any person could stand in the sun without crossing the threshold limit of IR rays?
The amount of Beta rays in 10 minutes of the sun's rays is how many times the amount of IR rays in 3 minutes of the sun's rays?
How many minutes of exposure to the sun in a day would be enough to ensure that the body receives enough Vitamin D, given that the body requires 40 units of Vitamin D every day and that 30 units of Beta rays generate one unit of Vitamin D?
The amount of Alpha rays received in two minutes is how much more/less than the amount of Radio waves received in four minutes?
