For the answer tot the question above, it is Thermal energy is the portion of internal energy that can be transferred from one substance to another. It is the energy that comes from heat. This is generated by the movement of the particles in an object.
Thermal energy is the energy and object or system has due to the movement of particles within. This results in the object or system having an internal <span>temperature that can be measured with a thermometer.</span>
Answer:
The speed of the automobile after 1.43s is 10 ![\frac{m}{s}](https://tex.z-dn.net/?f=%5Cfrac%7Bm%7D%7Bs%7D)
Explanation:
![a= \frac{-f}{m}= \frac{-u_{k}*m*g}{m}](https://tex.z-dn.net/?f=a%3D%20%5Cfrac%7B-f%7D%7Bm%7D%3D%20%5Cfrac%7B-u_%7Bk%7D%2Am%2Ag%7D%7Bm%7D)
![a= -u_{k}*g=- 0.590* 9.8 \frac{m}{s^{2} }= -5.782 \frac{m}{s^{2} }](https://tex.z-dn.net/?f=a%3D%20-u_%7Bk%7D%2Ag%3D-%200.590%2A%209.8%20%5Cfrac%7Bm%7D%7Bs%5E%7B2%7D%20%7D%3D%20-5.782%20%5Cfrac%7Bm%7D%7Bs%5E%7B2%7D%20%7D)
![V_{f} = V_{i} + a*t](https://tex.z-dn.net/?f=V_%7Bf%7D%20%3D%20V_%7Bi%7D%20%2B%20a%2At)
![V_{f} = 18.2 \frac{m}{s} - (5.782 \frac{m}{s^{2} }* 1.43 s)](https://tex.z-dn.net/?f=V_%7Bf%7D%20%3D%2018.2%20%5Cfrac%7Bm%7D%7Bs%7D%20-%20%285.782%20%5Cfrac%7Bm%7D%7Bs%5E%7B2%7D%20%7D%2A%201.43%20s%29)
![V_{f} = 9.93174 \frac{m}{s}](https://tex.z-dn.net/?f=V_%7Bf%7D%20%3D%209.93174%20%5Cfrac%7Bm%7D%7Bs%7D%20)
≅ 10 ![\frac{m}{s}](https://tex.z-dn.net/?f=%20%5Cfrac%7Bm%7D%7Bs%7D%20)
Answer:
The frequency heard by the observer is 2760.73 hertz. Explanation:
Frequency of source, f = 2640 Hz
Velocity of source, ![v_s=15\ m/s](https://tex.z-dn.net/?f=v_s%3D15%5C%20m%2Fs)
The speed of sound, v = 343 m/s
Let f' is the frequency heard by the observer. According to Doppler's effect, the frequency of the observer is given by :
(as the source is moving towards observer)
f' = 2760.73 Hz
So, the frequency heard by the observer is 2760.73 hertz. Hence, this is the required solution.
Explanation is in a file
bit.
ly/3a8Nt8n