Paczka o masie 5kg znajduje się na 7 piętrze, czyli 21 metrów od poziomu zerowego. Oblicz: a) energię potencjalną paczki na 7 piętrze. Podaj wartość energii całkowitej paczki (2pkt)

b) energię potencjalną paczki na 4 piętrze, czyli 12 metrów nad poziomem zerowym (1pkt)

c) energię kinetyczną paczki na 4 piętrze. (1pkt)

d) energię potencjalną i kinetyczną na wysokości 3 metrów na poziomem zerowym (2pkt)

specific latent heat of fusion, lf, of a substance is defined as the amount of heat required to change a unit mass of the substance from solid to liquid state, without any change in the temperature.

explanation:

the word that best describes martin luther king jr.'s tone in the video is dignified

martin luther king, jr. was a social activist and baptist minister who played a key role in the american civil rights movement from the mid-1950s until his assassination in 1968. the video shows his manner and attitude having or showing a composed or serious manner that is worthy of respect so dignified is the correct answer

firearm identification is the process of analyzing the bullets and cartridge cases left at a crime scene to determine if they came from a particular firearm. marks on the bullets and cartridges may be common to every firearm of that type. these are called class characteristics.