faridaahmedXz
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Take the mechanical equivalent of heat as 4 J/cal. A 10-g bullet moving at 2000 m/s plunges
into 1 kg of paraffin wax (specific heat 0.7 cal/g ·C◦). The wax was initially at 20◦ C. Assuming
that all the bullet’s energy heats the wax, its final temperature (in ◦ C) is:
A. 20.14
B. 23.5
C. 20.006
D. 27.1
E. 30.23

Respuesta :

Assuming that all the bullet’s energy heats the paraffin, its final temperature is 27.1 degree C. The correct option is D.

What is temperature?

Temperature is the degree of hotness and coldness of the material.

The energy of the bullet E = 1/2 mv²

E = 1/2 x 10 x 10⁻³ x (2000)²

E = 2 x 10⁴ J

This heat is used in heating the paraffin

E = m x c ΔT = m x c (Tfinal -Tinitial)

2 x 10⁴ J = 1 x 2.8 x 10³ x (Tfinal -20)

Tfinal = 27.1°C

Thus, the final temperature is 27.1 degree C. The correct option is D.

Learn more about temperature.

https://brainly.com/question/15267055

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