Answer:
The time interval is 22.76 hr.
Explanation:
Given that,
Time = 30 hrs
Speed = 0.74c
We need to calculate the time interval measured in earth frame
Using formula of time dilation
Where, = time interval measured in earth frame
=proper time interval
Put the value into the formula
We need to calculate the proper time interval when the velocity is 0.86c
Using formula of time dilation
Hence, The time interval is 22.76 hr.
Resistance
R
of a conducting wire of length
l
and of area of cross section
A
is given by the expression
R
=
ρ
l
A
where
ρ
is resistivity or specific resistance of the material of the conductor.
Inserting given values in the expression in SI units we get
34
=
(
1.7
×
10
−
8
)
l
π
(
0.1
1000
)
2
4
⇒
l
=
34
1.7
×
10
−
8
×
π
4
(
0.1
1000
)
2
⇒
l
=
15.71
m
, rounded to two decimal places.
Answer:
A.
Explanation:
hope it help,tnx sa points
1a.When a bus suddenly starts, the passengers sitting or standing in the bus tend to fall backward. This is due to inertia of rest and can be explained as follows: when the bus suddenly starts, the lower part of the body of the passenger which is in contact with the bus moves along with the bus while the upper part of the body tends to retain its state of rest due to inertia. As a result, the passenger falls backward.
2a.When moving bus suddenly stops, the passengers sitting or standing in the bus are thrown forward. This is due to inertia of motion and can be explained as follows: when the moving bus suddenly stops, the lower part of the body of the passenger contact with the bus suddenly comes to rest while the upper part of the body tends to retain its state of motion due to inertia. As a result, the passenger is thrown forward.
3a.When a person jumps out of a moving vehicle, he falls forward due to inertia of motion.
1b.When you kick a ball, you exert force in a specific direction, which is the direction in which it will travel.In addition, the stronger that ball is kicked, the stronger the force we put on it and the further away it will go.
2b.<span>Professional athletes move their hands back once they catch the ball as it provides the ball more time to lose its speed, and in turn apply less force on its part.
</span>3b.<span>In a golf game, the acceleration of the ball is directly proportional to the force applied to the club and inversely proportional to its mass. In the way influences the force of the air that can cause a small change in its direction.</span>
The central maximum
extends to the first minimum on either side.
So the first minimum
occurs at <span>3cm / 2 = 1.5cm = 0.015m to the side from the center of the
central maximum. </span>
<span>Now using the formula,
λ = a(y/L)</span>
Where a is the width of
the slit, y = distance of first minimum from center, L = distance of screen
from slit, and λ = wavelength of the light that strikes a single slit at normal
incidence which is unknown here.<span>
a = L x λ/y
a = 1.80 m x (λ / 0.015 m)
a = 120 λ </span>
<span>Use the value of λ for
any light and you get the width of slit.</span>