Which observation most likely indicates that a physical change has taken place?(1 point) A. A reaction occurs.

B. An odor occurs.

C. The temperature increases.

D. The process is reversible.

Why is freezing water a physical change?(1 point)

A. A temperature change occurs.

B. The new and original substances are different.

C. Heat is released during the process.

D. A phase change occurs.

Which option is an example of a chemical change?(1 point)
A. chopping vegetables

B. stretching a rubber band

C. folding paper

D. burning wood

plase

1 , D

2. D

3. D

Explanation:

1.changes to crystal form, textural change, shape, size, color, volume and density.

2.  because the chemical components are still the same( h2o) in order to change it back you have to do a physical change

3. because the process is irreversible physically and you will have to do a chemical change to change it back ( if thats even possible which to rn its not )

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.

explanation:

0.07 g/cm³

1.37 g/cm³