Answer:
Tectonic Plate Movement
Explanation:
Each continent and ocean sits on its own tectonic plate which floats on the Earths upper mantle. They move very little over time.
Answer:
C. Tension
Explanation:
The tension in the cord occurs because of the muscle power of Daryl, who lifts the brick. While doing so, Daryl needs to overcome the gravitational pull on the brick.
EXTRA:
If the brick was much heavier, than Daryl's muscles would not be able to overcome the the gravitational pull on that brick, and then the much heavier brick would remain stationary on the ground, despite the efforts made by Daryl.
Answer:
14.3°C
Explanation:
Find the ratio of 10°C : 700ml then use the same ratio to 1000ml.
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Answer:Magnitude of the butterfly's displacement is 11.4 m
Explanation:
from the above figure x distance is from center of the garden to edge = 7 m
height of the tree is y= 9 m
magnitude of the butterfly's displacement is
=
=
=11.4 m
Answer: a) 60m/s b) 360m c) 180m
Explanation:
Projectile motion occurs when an object launched into space falls freely under the influence of gravity.
If the time of flight (T) = 2Usin(theta)/g where;
U is the velocity of the object
theta is the angle at which the object was thrown
g is the acceleration due to gravity
Given T = 6 seconds
theta= 90°(object launched upwards)
g = 10m/s²
U= ?
Substituting in the formula we have;
6 = Usin90°/10
60 = Usin90°
since sin90° = 1
U = 60m/s
The balls initial velocity is 60m/s.
b) Maximum Height reached (H) = U²sin²theta/g
Given U = 60m/s, theta = 90° g = 10m/s²
H = 60²(sin90°)²/10
H = 3600/10
H = 360m.
The maximum height reached is 360m
c) at maximum height, v = 0
Using v² = u² - 2gh
0 = 60² - 2(10)h
-3600 = -20h
h = 3600/20
h = 180m
The cliff is 180m tall