Lol i'm doing the same packet for class.
35- A
36- C
37- B
38- B
39- D
40- B
41- D
<span>a. How much time elapses from start to stop
v = u + at
20 = 0 + 2t1
t1 = 10 sec
2nd phase:
v = u - at
0 = 20 - 1 x t2
t2 = 20 sec
total time = t1+t2 = 10 + 20 = 30 sec
b.</span><span>1st phase:
s = ut + 1/2at^2
s1 = 0 + 1/2 x 2 x (10)^2
s1 = 100 m
</span><span>2nd phase:
By s = ut - 1/2at^2
s2 = 20 x (20) - 1/2 x 1 x (20)^2
s2 = 200 m
total distance(s) = s1+s2 = 100 + 200 = 300 m
</span>
hope this helps
Answer:
Mantle convection is the very slow creeping motion of Earth's solid silicate mantle caused by convection currents carrying heat from the interior to the planet's surface. The Earth's surface lithosphere rides atop the asthenosphere and the two form the components of the upper mantle.
Explanation:
That’s true. You don’t need direction if you are only interested in speed
Answer:
Add an arrow above the symbol p to show it is a vector. Sometimes it is italicized in textbooks.
Explanation:
