Physics, 08.10.2019 05:20 jmanrules200
The uv light that is responsible for tanning the skin falls in the 320-nm to 400-nm region. calculate the total energy (in joules) absorbed by a person exposed to this radiation for 2.5 h, given that there are 2.0 × 1016 photons hitting earth’s surface per square centimeter per second over a 80-nm (320-nm to 400-nm) range and that the exposed body area is 0.45 m2. assume that only half of the radiation is absorbed and the other half is reflected by the body. (hint: use an average wavelength of 360 nm in calculating the energy of a photon.)
Answers: 3
Physics, 21.06.2019 21:50, jferdi2005
When applying kirchhoff's rules, one of the essential steps is to mark each resistor with plus and minus signs to label how the electric potential changes from one end of the resistor to the other. the circuit in the drawing contains four resistors, each marked with the associated plus and minus signs. however, one resistor is marked incorrectly. which one is it?
Answers: 1
Physics, 22.06.2019 05:30, iiwolfiexuni
Which of the following are considered noble gases? a. bromine b. neon c. argon d. chlorine
Answers: 1
Physics, 22.06.2019 11:30, rwerjekrryery6750
In order of decreasing light-transmitting capabilities of materials, which is the correct sequence? a. transparent -> translucent -> opaque b. opaque -> transparent -> translucent c. opaque -> translucent -> transparent d. translucent -> transparent -> opaque
Answers: 1
Physics, 22.06.2019 15:00, ReeceLehua01
Mechanical energy is when the amount of kinetic and potential energies added together remains the same. conserved created lost
Answers: 1
The uv light that is responsible for tanning the skin falls in the 320-nm to 400-nm region. calculat...
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