Compare Ideas in a Text Look back at Turn on the Power. Complete the following chart by
identifying if the ideas describe coal power, nuclear power, or both.
Coal Power
Nuclear Power
Both
Idea
Releases harmful smoke
into the air
Uses steam to turn a
turbine
Produces dangerous waste
Causes air pollution
Needs water to make
electricity
Splits atoms to make heat

1. coal

2. both

3.  both

4.  coal power

5. both

6. nuclear

Explanation:

coal or both im not really sure bcuz they bboth kinda do..

coal

nuclear

both

Nuclear

coal

you need to take a look at the periodic system in order to sort these elements into pairs that would most likely exhibit similar chemical properties. first, you need to find elements that are found in the same group (groups are vertical in the periodic system), and then to see whether they have the same valence number. if they meet these criteria, they will have similar properties.

the first pair: ne (neon) and kr (krypton), are noble gases found in group 8

the second pair: li (lithium) and k (potassium), found in group 1

the third pair: s (sulfur) and te (tellurium), found in group 6

a: 45.9 meters

b: 4.29 seconds

step-by-step explanation:

a: h(t)=1/2(-9.8)(3)^2+0(3)+90

h(t)=-4.9(3)^2+90

h(t)=-44.1+90

h(t)=45.9 meters

b: 0=1/2(-9.8)(t^2)+0t+90

0=-4.9t^2+90

-90=-4.9t^2

18.37=t^2

t=4.29 seconds

in the second question, the numbers aren't exact, but they're a close approximation.