B.) should be the right/best answer if u divided
False. Most of the bright stars in our galaxy are located in the disk.
Answer:
a) F1 = 1999.8 N
, F2 = 4545 N
, F3 = 2778 N
, c) the cans do not collapse because the pressure is applied on both sides
Explanation:
Let's use the pressure equation
P = F / A
Suppose we have atmospheric pressure 1.01 10⁵ Pa
Let's calculate the area of the can that is a parallelepiped
Length L = 25 cm
width a = 18 cm
high h = 11 cm
Side area A = h a
A = 11 18
A1 = 198 10⁻⁴ m²
Lid area
A2 = L a
A2 = 25 18
A2 = 450 10⁻⁴ m²
Other side area
A3 = L h
A3 = 25 11
A3 = 275 10⁻⁴ m²
Now let's calculate the force on these sides
Side 1
F1 = P * A1
F1 = 1.01 10⁵ 198 10⁻⁴
F1 = 1999.8 N
Side 2
F2 = P A2
F2 = 1.01 10⁵ 450 10⁻⁴
F2 = 4545 N
Side 3
F3 P A3
F3 = 1.01 10⁵ 275 10⁻⁴
F3 = 2778 N
We see that the force is greater on side 2 which is where the can should collapse
b) To compare the previous forces we must use the concept of density, in general the cans are made of aluminum that has a density of 2700 kg / m3
d = m / V
m = d * V
V = L a h
V = 0.25 0.18 0.11
V = 0.00495 m3
m = 2700 0.00495
m = 13.4 kg
This is the maximum weight, because much of the volume we calculate is air that has a much lower density
W = 13.4 * 9.8
W = 131.3 N
Let's make the comparison by saying the two magnitudes
Side 1
F1 / W = 1999.8 / 131.3
F1 / W = 15.2
Side 2
F2 / W = 4545 / 131.3
F2 / W = 34.6
Side 3
F3 / W = 2778 / 131.3
F3 / W = 21.2
c) the cans do not collapse because the pressure is applied on both sides: outside and inside, so the net force is zero on each side.
Answer:
kinetic energy is 3.68 ×
J
speed of these electrons is 0.5565 c
Explanation:
Given data
voltage difference = 230 kV
to find out
kinetic energy and speed of these electrons
solution
we know kinetic energy formula that is
kinetic energy = qv
kinetic energy = 1.6 ×
× 230 × 
kinetic energy = 3.68 × J
and
speed of electron that is
kinetic energy = m1c² - m2 c²
here m1 = m / √(1-v/c)²
so
KE/mc² = ( 1 / √(1-(v/c)² ) - 1
put value here
3.68 × / (3× 10^8)²×9.11×
= ( 1 / √(1-v/c)² ) - 1
0.448835223 = ( 1 / √(1-(v/c)² ) - 1
( 1 / √(1-(v/c)² ) = 0.448835223 + 1 = 1.448835223
√(1-(v/c)² = 1 / 1.448835223 = 0.6902096
(v/c)² = 1 - 0.6902096 = 0.309790
v = 0.5565 c
speed of these electrons is 0.5565 c
A woman walks in a straight line with the sun to her right at six o'clock in the morning.
The sun rises East of her, so the woman is walking toward the North pole.
A man walks in a straight line with the sun to his right at six o'clock in the evening.
The sun sets West of him, so the man is walking toward the South pole.
The woman and the man are both walking along lines of constant longitude.
