sddebabryanna sddebabryanna

25-01-2017
Chemistry

contestada

Melissa uses a sunscreen with an spf rating of 20. what does this does this mean?

Respuesta :

CUTIEPIE4U CUTIEPIE4U

25-01-2017

If the SPF rating is 20 then it means it would provide 20 times the protection instead of no sunscreen and 20 times longer someone would take before the person started to burn or in this case 200 minutes.

Answer Link

Otras preguntas

Since people remember very little from speeches, how many ideas should you provide your listeners?

The islets of __________ are the hormone-producing structures in the pancreas that manufacture insulin and __________.

Scientists have believed for many years that marine temperatures drop as ocean depth increases. What experimental method would best test this hypothesis, and wh

Which part of a flower will develop into fruit?

In a voltaic cell, where does the reduction take place?

Helene a hiker starts at an elevation of 27 ft above sea level and descends 32ft during her hike to Basecamp which describes the elevation of base camp

The healthy fitness zones (HFZs) for teenagers include which components of health-related fitness? (Choose all that apply.) A. cardiorespiratory endurance B. mu

¿A que se traduce antigua, guatemala en ingles?

Which has a greater area, a square with sides that are x - 1 units long or a rectangle with a length of x units and a width of x - 2 units?

Suppose you throw a ball vertically downward with a speed of 10 m/s. neglecting air friction, what would be the speed of the ball one second later?