What is the energy of an electromagnetic wave with a frequency of 3 x 109
Hz?
A. 5.96 x 10-17
B. 6.63 x 10-35 u
c. 9.00 x 1017
D. 1.99 x 10-24

What is the composition, in atom percent, of an alloy that consists of 4.5 wt% pb and 95.5 wt% sn? the atomic weights for pb and sn are 207.19 g/mol and 118.71 g/mol, respectively.(a) 2.6 at% pb and 97.4 at% sn(b) 7.6 at% pb and 92.4 at% sn(c)97.4 at% pb and 2.6 at% sn(d) 92.4 at% pb and 7.6 at% sn

Acompound contains c, h, and o atoms. when 1.130 g of the compound is burned in oxygen, 1.064 g co2 and 0.3631 g h2o are produced. what is the empirical formula of this compound?

How does the principle of electromagnetism explain the interaction between earth’s magnetic field and the solar wind?