A. 5 kg pizza is sitting on a kitchen counter 1.5 m high. How much potential energy does the pizza have?

73.5J

Explanation:

Given that,

Mass of pizza (m) = 5 kg

Height of kitchen counter (h) = 1.5m

Potential energy of pizza (PE) = ?

Potential energy is the energy possessed by an object at rest. And it depends on the mass (m), height (h), and acceleration due to gravity (g). Use the value of g, which is 9.8 m/s²

PE = mgh

PE = 5 kg x 9.8 m/s² x 1.5 m

PE = 73.5 J

Thus, the pizza has 73.5 joules of potential energy.

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.

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