This is quite an opinonated question because everyone learns and retains information differently. For me personally, I learn best in physics by doing lots and lots and LOTS of practice problems. the more repetition you get with the material the easier it will be for you to tackle problems quickly. The repetitive practice will also stick the equations in your head for a very long time. Hope this helped! I wish you the best of luck on your exam!
Answer
given,
mass of the boiled egg = 50 g = 0.05 Kg
spring constant, k = 25 N/m
initial Amplitude, A₁ = 0.3 m
final amplitude, A₂ = 0.1 m
time, t = 5 s
considering the amplitude of damped harmonic oscillation to calculate damping factor.
![A_2 = A_1 e^{-(\dfrac{b}{2m})t}](https://tex.z-dn.net/?f=A_2%20%3D%20A_1%20e%5E%7B-%28%5Cdfrac%7Bb%7D%7B2m%7D%29t%7D)
b is the damping factor and t is the time.
![e^{-(\dfrac{b}{2m})t}=\dfrac{A_2}{A_1}](https://tex.z-dn.net/?f=e%5E%7B-%28%5Cdfrac%7Bb%7D%7B2m%7D%29t%7D%3D%5Cdfrac%7BA_2%7D%7BA_1%7D)
on solving
![b= \dfrac{2m}{t}ln(\dfrac{A_1}{A_2})](https://tex.z-dn.net/?f=b%3D%20%5Cdfrac%7B2m%7D%7Bt%7Dln%28%5Cdfrac%7BA_1%7D%7BA_2%7D%29)
inserting all the given values
![b= \dfrac{2\times 0.05}{5}ln(\dfrac{0.3}{0.1})](https://tex.z-dn.net/?f=b%3D%20%5Cdfrac%7B2%5Ctimes%200.05%7D%7B5%7Dln%28%5Cdfrac%7B0.3%7D%7B0.1%7D%29)
b = 0.0219 Kg/s
damping coefficient in three significant figure
b = 0.022 Kg/s
Explanation:
The coefficient would be carbon since carbon has 2 molecules in h2o and oxygen.
Answer:
ambulance speed is 30.38 m/s
Explanation:
given data
hear frequency = 510 Hz
pass frequency = 427 Hz
speed of sound = 343 m/s
to find out
ambulance speed
solution
we consider here ambulance speed is v
so when we hear frequency velocity equation will be
510 = 343f / ( 343 - v ) ...........................1
and when ambulance pass velocity equation will be
427 = 343f / ( 343 + v ) ...........................2
so from equation 1 and equation 2
= 510 / 427
= 510 / 427
solve it we get
v = 30.38 m/s
so ambulance speed is 30.38 m/s
Answer:
let distance be D km
total time taken, T (hrs) = D/30 + D/50
Average speed , V = total distance/ total time = 2D/T = 2/(1/30+1/50) = 37.5 km/hr
Explanation: