Three people are installing equipment. Cyrus is installing a heating system, Aletta is installing a cooling system, and Francis is installing a cooling system.
Which best describes the possible equipment they could install?
O Cyrus is installing an air conditioner, Aletta is installing a furnace, and Francis is installing a heat engine.
Cyrus is installing a furnace, Aletta is installing a heat pump, and Francis is installing an air conditioner.
O Cyrus is installing a heat pump, Aletta is installing a thermostat, and Francis is installing a furnace.
O Cyrus is installing a thermostat, Aletta is installing an air conditioner, and Francis is installing a heat engine.

found in the nucleus

has mass of one amu

the first american roller coaster was the mauch chunk switchback railway, built in the mountains of pennsylvania in the mid-1800s. the track, originally built to send coal to a railway, was reconfigured as a "scenic tour."

the box does not move because you need to use a force greater than 300 n. you are only using 50 n. it needs to at least be 301 n for the box to move because then it is an unbalanced force and it will move the way that the greater force is pushing it. if you use only 300 n it will be a balanced force and will not move because the force you are exerting on the   box is the same as its force.

hope this !

im sorry if i went too in depth, i am going to include a link to a video on khan academy that will explain this.   hope that you like the video and that it explains more in detail to you.

that is the link.