D. three-fourths
Approximately how much of the planet is covered in water?<em><u>3/4
</u></em>
NOT:
A. one half
B. two-thirds
<span>C. one-fourth</span>
Answer:
a ) -10780 Pa
Explanation:
b ) Initially the pressure inside lungs and atmospheric pressure are equal . When the gauge pressure of the lungs becomes negative , its pressure becomes less than the atmospheric pressure . It creates a pressure difference between the pressure acting on the open surface of water and surface of water inside the pipe which is connected to the lungs. This difference pulls the water inside the pipe.
Pressure difference = gauze pressure of lungs = h d g = 1.1 x 1000 x 9.8
= 10780 Pa.
Answer: the object will have an acceleration and the object's velocity will change.
Explanation: I just know
No spacecraft has been built yet that was able to absorb harmful
radiations in space, change weather conditions on Earth, or destroy
meteors and comets which might strike Earth.
We should continue to send robotic spacecrafts into space
because they help discard some myths about objects in space.
In other words, they help us learn things that we never knew before.