Answer:
5.82 mm
Explanation:
length of the track, L = 23 m
Initial temperature, T = 7 °C
final temperature, T' = 30 °C
Coefficient of linear expansion, α = 11 x 10^-6 / °C
Let the increase in length of the track on the hot day is ΔL.
use the formula of the linear expansion
ΔL = L x α x ΔT
ΔL = L x α x (T' - T)
ΔL = 23 x 11 x 10^-6 x (30 - 7)
ΔL = 5.82 x 10^-3 m
ΔL = 5.82 mm
Thus, the increase in the length of the track is 5.82 mm.
Answer: 19 s
Explanation:
The relationship between speed, distance and time is given by:
velocity= distance/time
time= distance/velocity= 323 m/17 m/s= 19 s
Answer:
Uhm where are the questions and answers?
Before coming into conclusion first we have to understand both scalar and vector .
A scalar quantity is a physical quantity which has only magnitude for it's complete specification.
A vector quantity is that physical quantity which not only requires magnitude but also possesses direction for it's complete specification.
So the most important factor that differentiate vector from scalar is the direction.
As per the question the student is doing an experiment where he is recording the data obtained during the process.
In order to arrange them in data table, he should ask about the direction of the quantity under consideration.
Hence the correct option is the third option(C)i.e does the measurement include direction?
Answer:
2.06 N/m
Explanation:
The system makes 10.0 complete oscillations in 17.0 s. So, the frequency of the system is
The angular frequency of the system is given by
In a simple harmonic motion, the angular frequency is related to the mass and the spring constant by
where
k is the spring constant
m is the mass
Here we know
So we can solve the formula to find k:
