Answer:
a) we know that resistance is directly proportional to the length of the conductor as length increases the resistance also increases so to direct the current with least resistance, then the direction is perpendicular to side B only other sides have a larger length than B.
b) = 4.35 × 10⁻⁴ m/s
time = 229.56 s
Explanation:
Given:
a) we know that resistance is directly proportional to the length of the conductor as length increases the resistance also increases so to direct the current with least resistance, then the direction is perpendicular to side B only other sides have a larger length than B.
Dimension = 0.2m × 0.1m × 0.02m
ρ = 1.69×10⁻⁸ Ωm
= 8.49 × 10²⁸ e−/m³
Potential difference across the solid = 0.001 V
Now,
from Ohm's law V = I × R
here
V is potential difference
I is the current
R is the resistance
or
R =
also,
R =
Here, l is the length
A is the area
and,
the drift speed, =
substituting value of I in the above equation, we get
=
on substituting the values, we get
or
= 4.35 × 10⁻⁴ m/s
also,
the time taken, t =
=
= 229.56 s
Answer:
x₁ = 0.1878 m
Explanation:
For this exercise we will use conservation of energy
starting point. Highest point
Em₀ = U = m g h
final point. Lowest point with fully compressed spring
Em_f = K_e + U
Em_f = ½ K x² + m g x
energy is conserved
Em₀ = Em_f
m g h = ½ K x² + m g x
½ K x² + mg (x- h) = 0
let's substitute
½ 7.3 x² + 0.030 9.8 (x- 0.25) = 0
3.65 x² + 0.294 (x- 0.25) = 0
x² + 0.080548 (x- 0.25) = 0
x² - 0.020137 + 0.080548 x = 0
x² + 0.080548 x - 0.020137 = 0
let's solve the quadratic equation
x = [0.080548 ±√ (0.080548² + 4 0.020137)] / 2
x = [0.080548 ± 0.29502] / 2
x₁ = 0.1878 m
x₂ = -0.1072 m
These are the compression and extension displacement of the spring
Answer:
a. about 20 years younger
b. Malcolm sits around for 49.94 years
c. <em>2.268x</em><em> m</em>
Explanation:
light travels 3x m in one seconds
in 20 years that will be 3x x 20 x 60 x 60 x 24 x 365 = 1.89x m
for the to and fro journey, total distance covered will be 2 x 1.89x = 3.78x m
Flo's speed = 80% of speed of light = 0.8 x 3x = 2.4x m/s
time that will pass for Malcolm will be distance/speed = 3.78x /2.4x
= 1575000000 s = <em>49.94 years</em>
the relativistic time t' will be
t' = t x
t' = 49.94 x
t' = 49.94 x 0.6 = <em>29.96 years</em> this is the time that has passed for Flo
this means that<em> Flo will be about 20 years younger than Malcolm when she returns</em>
<em></em>
relativistic distance is
d' = d x
d' = 3.78x x
d' = 3.78x x 0.6
d' = <em>2.268x</em><em> m</em> this is how far it is to Flo
Normal force, weight, Kinetic friction, and air resistance are a few I think of the top of my head.
I hope this helps