<span>The heavier the body is, the stronger
its gravitational pull. Just like earth, we feel gravitational pull because we
are attracted to earth and so is the moon. Also, the sun is heavier than the
earth and therefore, we are attracted to the sun because of its gravitational
pull. When the earth revolves around the sun, both of them releases
gravitational waves. Gravitational waves are ripples of waves travelling
outward from the source. The more massive the orbit of two bodies, the more it
emits gravitational wave. And everything around it that is near within the wave
experiences a ‘pull’ toward the orbiting bodies. The advantages we get when we
can measure gravitational waves are; one, we can measure the activity between
two bodies in orbit in the universe, two, scientist can estimate the merging of
two bodies in the universe every 15 minutes by using LIGO and three, we can
know the behavior of other bodies that we did not know exist.</span>
Example:
<span>Suppose that a ball has an initial velocity v0 that has magnitude 20.0 m/s and is directed 60.0 degrees above the negative x axis.
Then, the x-component is,
20.0 * cos(-60) = 20.0 * (1/2) = 10.0</span> m/s
Answer:
Reagent: aqueous bromine
Observation with ethene: solution turns from brown to colourless.
Observation with ethane: solution remains brown
Explanation:
Unsaturated compound contain C - C double bond while Saturated compound contain C - C single bond. Alkenes with C - C double bonds (unsaturated) can undergo bromination reaction while alkanes (saturated) are not able to do so due to the absence of C - C double bonds.
To make a base line mark to know where she started measuring the snails movement, at the end of the day she can measure from her first line to her last to see how far the snail went.
Hope this helped!
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I hope these answers are helpful:
74. (A) The height and horizontal width of the water’s path will increase.
The reason is that the position which the gardener holds the nozzle would probably increase the pressure to push the flow rate of the water along the length of the hose to push against gravity.
15. (B) From the tail of the first vector to the top of the last vector.
The direction of a vector is from its tail to its head. Examples that are similar would be an arrow or a line segment.
