In an active solar system, a water or hydronic substance is heated in a solar collector. What is a hydronic substance?

During the sixth grade camping trip nine students can sleep in each cabin or boys and girls asleep in each cabin if they're 70 boys and 76 girls on the sixth grade how many cabins will be needed to house all of the students

A super train is moving along a track at a speed close to the speed of light. you are watching the train from the ground. you observe lightning to strike in two places along the track, a mile apart, at precisely the same time.

4. What emblem was the Pythagoreans' secret way of entry? a. Square c. Pentagram b. Spiral d. Triangle

What is the difference between matter and elements

An element's atomic number is 39. How many protons would an atom of this element have?

An electron and a proton, starting from rest, are accelerated through an electric potential difference of the same magnitude. in the process, the electron acquires a speed ve, while the proton acquires a speed vp. find the ratio ve/vp.

Why water is matter? what is the reason

Restate newton's first law in terms of acceleratin

What step precedes the onset of hydrogen fusion in a star?

Manuel is holding a 5kg box how much force is he exerting on it