The diagram shows stream gradient. if a stream has a horizontal distance of 10 km and begins at an elecation 100m higher than where it ends, what is its stream gradient
a) 100m x 10km = 1000m/km
b) 100m / 10km = 10m/km
c) 10km + 100m = 110km/m
d) 10km / 100m = 0.10km/m

when the volume of gas is   changed from   717.73 ml   to 852 ml   the temperature will   change   from 315   c to 452   c

    calculation

this is calculated using the charles law formula

that is,   v1/t1 = v2/t2

          v1=?

        t1 = 315 c   into   kelvin = 315 +273 = 588 k

        v2 = 852   ml

        t2 = 425c + 273 =698 k

make v1   the subject of the formula ( by   multiplying both side by t1)

  v1=( v2 xt1) / t2

v1= (852 ml   x 588 k)/ 698 k= 717.73 ml

1. a)c-14 has two more protons

2. d)they have different numbers of protons, neutrons, and valence electrons; they are all gases at room temperature.

3. c) iron and nickel.

the answer is 0.42 is that is an option. this question provides no info