Polonium-218 has a half-life of about 2 days.
after 10 days, how many milligrams of a 1200 mg sample will remain?

37.5 mg

Step-by-step explanation:

Half life of Polonium-218 = 2 days

Initial sample mass = 1200 mg

Time interval = 10 days.

Number of half lives in 10 days = = 5

After 5 half lives the initial sample will reduce to  of its initial amount.

So 1200 mg will reduce to  = 37.5 mg

The resultant sample weight will become 37.5 milligram after 10 days.

explanation:

infrared radiation has wavelength in the range between 700 nm and 1 mm. lets' convert these values into scientific notation, keeping in mind that:

let's start from the lower value, we have:

(we moved the dot two places to the left, so we increased the exponent by 2 units, from -9 to -7)

the higher value is:

so, the range of wavelength of infrared radiation is:

160 cm

step-by-step explanation:

you have to add all the sides together