Question

2. Take small but equal amounts of water and milk in two different but similar

containers. Freeze them by putting in a refrigerator. Now melt them in the sunshine,

boil them on the same stove under the same conditions, and evaporate them

completely. Note their temperature and time during changing of their states. What

similarities and differences you find while changing the states of both of the

materials. Support your investigation results with time and temperature graph​

Answer 1

Dette er ikke svaret ditt☹️

•°.•°.•°.•°.•°.•°.•°.•°.•°.•°.•°.•°.•°.•°.•°.•°.•°.•°.•°

✌️❣️

Let the height of the tree be y and width of the river be x and CD = 40 m

In ΔABD, tan 300 =

A

x

+

40

⇒ x+40 = y

√

3

………..(i)

In ΔABC,

tan 600 =

A

=

y

x

⇒ y = x

√

3

……………(ii)

Putting the value of y from (ii) to (i)

x+40= [x

√

3

]

√

3

= 3x

40 = 2x

⇒ x= 20

y = x

√

3

= 20

√

3

Height of the tree = 20

√

3

m

Width of the river = 20 m.

✌️❣️