so, is it equal 6.9*10^22 ?
A lead atom has a mass of 3.4⋅10^-22 g. How many lead atoms are in a cube of lead that has a volume of 2.07 cm^3 if the density of lead is 11.3 g/cm^3?
The bond between protons and neutrons inside the atomic nucleus is formed by the strong interaction. In classical terms, we can think of it as protons and neutrons exchanging a "meson," a kind of fundamental particle between them. Let's estimate the range of the ...
Car A of mass 1 000 kg,stationary at a traffic light,is hit from behind by car B of mass 1 200 kg,traveling at 18 m.s-1. Immediately after the collision car A moves forward at 12 m.s-1. 1. Assume that linear momentum is conserved during this collision. Calculate the speed of ...
How can you use multiplication facts for 1 and 2 to find 3x7 ?
the total decrease in population during fir5st year= 2950,000*2.5/100=73750 therefore, total decrease in population for 1 st year=2950,000-73750=2876250 total population in second year= 2876250 total decrease in population during the second year= 2876250*2.5/100=71906.25 there...
4th grade math
9 1/5 makes 9*5+1/5=46/5 46/5*30=276
Math PLEASE HELP ME!!
14% of 120 14/100*120=16.8