If you stick to the usual definition of Work = (force) x (distance), then the answer
is zero. The microwave oven doesn't exert any mechanical force on the leftover
meatloaf, and at the end of the 5 minutes of cooking time, the meatloaf is in the
exact same place where it started. So 'force' and 'distance' are both zero.
But if we recognize that 'work' is just a transfer of energy, then we can easily
calculate the cooking energy that the oven pumps into its cooking chamber.
Remember that 1 watt = 1 joule per second.
(500 joule/sec) x (5 min) x (60 sec/min) = <em>150,000 joules</em>
Answer:
C) Mitochondrial DNA
Explanation:
Mitochondrial DNA can help forensic scientists in recovering the follicular tissue that is attached to the hair, they can find out the specific suspect from that hair.
Mitochondrial DNA is maternally inherited and enables forensic scientists to trace maternal lineage.
Answer:
A
Algebra For what values of the variables must ABCD be a parallelogram?
B
23. A 2y + 2 B 24. B
(3x + 10)
(8x + 5)º
3x + 6
54°
D
С
D
A
Зу - 9 с
ly+4
Answer:
a) Ф = 0.016 N / C m
, b) q_{int} = 0.14 10⁻¹² C
Explanation:
a) For this problem we use Gauss's law
Ф = E .ds = /ε₀
The camp is in the x direction so it has no flow through the cylinder walls.
Ф = E A
The area of a circle is
A = π r
Ф = E π r
Ф = (x- 3.6) r
Let's calculate
Ф = (3.7 -3.6) 0.16
Ф = 0.016 N / C m
b) we clear from Gauss's law
q_{int} = Ф ε₀
Where the flow is on both sides, on the face at x = 0 the flow is zero
q_{int} = 0.016 8.85 10⁻¹²
q_{int} = 0.14 10⁻¹² C
The correct answer should be :
D) the area where the magnetic force is exerted.
Hope this helps,
Davinia.