the intellect has so dominated the modern man that his approach to these questions is first made through it. yet the intellect cannot provide the answers to them.

How would the previous sentence be correctly capitalized?
Answer: The intellect has so dominated the modern man that his approach to these questions is first made through it. Yet the intellect cannot provide the answers to them.
add the rice, salsa, oregano and salt.

How would the previous sentence be correctly capitalized?
Answer: Add the rice, salsa, oregano and salt.
the powerful heating element takes just 70 minutes to heat the water from 15c to 70c

How would the previous sentence be correctly capitalized?
Answer: The powerful heating element takes just 70 minutes to heat the water from 15C to 70C
"we also want to emphasize just how robust ec-oil hydraulic connections are," says john lundqvist, explaining that each movable part of the connector (female + male) has an o-ring seal that is easy to access, making maintenance simple. it's also the only o-ring on ec-oil; the connectors are instead sealed through their smart conical shape.

How would the previous sentence be correctly capitalized?
Answer: "We also want to emphasize just how robust EC-Oil hydraulic connections are," says John Lundqvist, explaining that each movable part of the connector (female + male) has an O-ring seal that is easy to access, making maintenance simple. It's also the only O-ring on EC-Oil; the connectors are instead sealed through their smart conical shape.