Answer:
A researcher seeks to prove that babies smile at two months old. She counts some confused expressions as smiles.
Explanation:
This is the answer because its not actual date due to the fact she's using her opinion to decided whether or not the expression a baby is making is a smile, whereas the other answers had factual data involved.
I there supposed to be a picture here or
<span><span> High School </span> <span> Physics </span> <span> 5+3 pts </span> </span><span><span>Previous question </span> </span> <span><span>Next question </span> </span> <span>Naomi wants to know the effect of different colors of light on the growth of plants. She believes that plants can survive best in white light. She buys 25
</span>
The approximate acceleration of gravity for an object above the earth's surface is 9.8 m/s².
<h3>
Acceleration due to gravity </h3>
The acceleration due to gravity of an object above the Earth's surface is calculated from Newton's second law of motion and Newton's law of universal gravitation.
<h3>Force between the object and Earth</h3>
<h3>Weight of the object</h3>
Solve (1) and (2)
mg = GmM/R²
g = GM/R²
where;
- M is mass of Earth
- G is gravitational constant
- R is radius of the Earth = 6,371 km
g = (6.673 x 10⁻¹¹ x 5.98 x 10²⁴)/(6,371 x 10³)²
g = 9.8 m/s²
Learn more about acceleration due to gravity here: brainly.com/question/88039
#SPJ1