nopuedesernoooo387 nopuedesernoooo387
  • 11-10-2019
  • Engineering
contestada

A battery weighing 0.525 lb can store 30.8 kcal of electrical energy. What is the energy density of the battery in Wh per kg? Give your answer to an accuracy of 3 significant figures.

Respuesta :

gmecatronics
gmecatronics gmecatronics
  • 12-10-2019

Answer:

Energy Density: 129.412 [tex]\frac{Wh}{kg}[/tex]

Explanation:

First of all, let's convert the battery weighing from pounds to kilograms:

0.525 lb x [tex](\frac{0.454 kg}{1 lb})[/tex] = 0.238 kg

Now let's convert the electrical energy from kcal to Wh:

30.8 kcal x [tex](\frac{1 Wh}{1 kcal})[/tex] = 30.8 Wh

Now we can calculate energy density as follows:

Energy Density = [tex]\frac{30.8}{0.238}[/tex]

Energy Density = 129.412 [tex]\frac{Wh}{kg}[/tex]

Answer Link

Otras preguntas

What percentage of young males receives an HIV diagnosis each year? A. 25% or 1/4 B. None apply C. 50% or 1/2 D. 75% or 3/4
PLEASE SOMEONE HELP I DONT GET THIS!!!!!
The entire graph of the function f is shown in the figure below. Write the domain and range of f using interval notation.
How many cell organelles and their functions?
I need help please!!
Graph the piecewise function. (6 points - 2 points for each piece)
Write an equation of the line passing through point P(0, -1) that is parallel to the line y = - 2x+3.
Please help with number 6 and 7
A silver mine can yield 10,000 ounces of silver at a variable cost of $32 per ounce. The fixed costs of operating the mine are $40,000 per year. In half the yea
PLEASE HELP NOW. Write a summary of what happens after hurricane. Include these terms in your summary: rebuilding, relief agencies, cleaning up, Caribbean.