I need some help please.

D = 2.7 g/cm³

Explanation:

Density = mass/volume

Step 1: Define

Mass = 729 g

Volume = 270 cm³

Step 2: Substitute

D = 729 g/270 cm³

Step 3: Simplify

D = 2.7 g/cm³

the transfer of heat by electromagnetic radiation is called thermal radiation . it is usually carried out by electromagnetic waves in an energy range just below the visible spectrum, which is the infrared range.

so the answer would be radiation.

: )

the answer is yes

it has kinetic energy

reason

an object has kinetic energy when you stop the force carrying it, the object will stay in motion.

hope this contact me for more questions if you'd like: )