Help! 1. why can we see bones in an x-ray

2. compare x-rays with uv rays

3. what temperature are the objects in space that x-rays come from?

X-ray imaging creates pictures of the inside of your body. The images show the parts of your body in different shades of black and white. This is because different tissues absorb different amounts of radiation. Calcium in bones absorbs x-rays the most, so bones look white.

The differences between ultraviolet light and x-rays are also wavelength, frequency and quantum energy. In the electromagnetic spectrum, ultraviolet is beyond violet, x-rays are beyond ultraviolet, and gamma rays are beyond x-rays. ... UV-C has the shortest wavelengths and is dangerous ionizing radiation.

X-rays come from objects that are millions of degrees Celsius—such as pulsars, galactic supernovae remnants, and the accretion disk of black holes. From space, x-ray telescopes collect photons from a given region of the sky.

what are the two models

explanation:

answer : (a) volume of the gas = 8.67 ×   l

                (b) second virial coefficient b = -1.21226 l/mole

solution :   given,     t = 300k

                                p = 20atm

                                z = 0.86

                                n = 8.2 mmoles = 8.2 × moles

                                r =   0.082 l atm/k/mol

        find,     (a) volume of gas   and (b) second virial coefficient b at 300k.

formula used :            

                          and            

(a)            

                    = \times 0.082\times 300}{20}[/tex]

                    = 8.67 ×   l

(b)      

                    = (0.00867-1) × 8.659

                    = - 8.5839 l/mole