Explanation:
Avg speed × total times = total distance
20×25=500
Since acceleration in the 1st interval is same as deceleration in the 3rd interval and deceleration is from the same velocity achieved after acceleration, t
1
=t
3
s
1
=
2
1
×5t
1
2
s
2
=(5t
1
)t
2
s
3
=(5t
1
)×t
3
−
2
1
×5×t
1
2
=(5t
1
)×t
1
−
2
1
×5×t
1
2
s
1
+s
2
+s
3
=5t
1
t
2
+5t
1
2
⇒5t
1
2
+5t
1
t
2
=500−−−−1
2t
1
+t
2
=25−−−−2
Solving (1 ) and (2) ⇒t
1
=5,t
2
=15sec
Answer:
Cactus spines
Explanation:
The cactus spines keep predators away and prevent different organisms from eating it. This helps it to survive in the desert. Another adaptation is very thick, waxy cuticle help to reduce water loss by evaporation.
Answer:
Marigold --> Pill Bug --> Fly
Explanation:
A heterogeneous mixture is made of different materials that can easily be separated.
