Answer:
Answer c. 1.4 mm
Explanation:
Notice that the addition of these two waves are equivalent to adding a sine wave plus a sine wave shifted by pi/2.
The maximum of such addition will come from twice the y value of the two functions at the point of intersect that takes place at about one grid unit to the right of the vertical axis. That intersection reads about 0.7 mm for the y value (which corresponds to an x of about pi/4)
Then, the addition of both y-values will give an amplitude of 1.4 mm
Answer:
(A) W fric > 0
Explanation:
According to the law of energy conservation, mechanical energy stays always constant. So if the ball come back to the same position (same potential energy) but with reduced speed (kinetic energy), then the kinetic energy has been affected by friction work created by air resistance. This work is non 0 and larger than 0. So the total of this friction work and kinetic energy after the fall = kinetic energy before the fall.
This co -relates to continent drift theory.
This theory states that the outer rigid layer of the earth or the lithosphere is divided into a couple of dozen "plates" that move around across he earth's surface relative to each other. That is why Alfred Wegener noticed that Africa and South America seem to fit together.
Though Wegener's hypothesis lacked a geological mechanism to explain how the continents could drift across the earth's surface as he proposed.
<span>Slow moving vehicles must display reflective emblem at the rear to warn of their low speed.
The sign consists of a triangle and the primary purpose is to prevent any sad incident to happen, as slow moving vehicle (SMV) can cause serious accidents due to the less visibility at various times, therefore the sign must be visible enough. </span>
Answer:
C
Explanation:
Centripetal acceleration is:
a = v² / r
First, convert km/h to m/s:
108 km/h × (1000 m / km) × (1 h / 3600 s) = 30 m/s
Therefore, the acceleration is:
a = (30 m/s)² / 300 m
a = 3 m/s²
