Answer:
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Explanation:
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Answer:
The pack has fallen 275.6 m
Explanation:
The pack is in free fall, so it is moving by uniform accelerated motion, so we can use the following suvat equation:
where, choosing upward as positive direction:
v is the final velocity
u is the initial velocity
is the acceleration of gravity
s is the vertical displacement
For the pack in this problem,
u = 0
v = -73.5 m/s
Solving for s, we find how far the packet has fallen:
And the negative sign means the direction of the displacement is downward.
Answer:
D. Hydrogen
Explanation:
The sun is a big ball of gas and plasma. Most of the gas — 91 percent — is hydrogen.
The elastic potential energy of a spring is given by
where k is the spring's constant and x is the displacement with respect to its unstretched position.
The initial potential energy of the spring is zero, because it is in unstretched postion, therefore x=0. The final potential energy is instead, using
and
,
And so, the increase in potential energy is
Answer:
Light rays that come from a source such as the sun reflect off items and enter our eye. ... While black objects absorb the energy from all colors and become hot, the objects gradually release some of that energy back into the air around it
Explanation:
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