velocity is given as
![v = t^2 - 7t +10](https://tex.z-dn.net/?f=v%20%3D%20t%5E2%20-%207t%20%2B10)
when the object reached to its turning its velocity will be zero
![0 = t^2 - 7t +10](https://tex.z-dn.net/?f=%200%20%3D%20t%5E2%20-%207t%20%2B10)
![(t - 5)(t-2) = 0](https://tex.z-dn.net/?f=%28t%20-%205%29%28t-2%29%20%3D%200)
so it will reach its turning at two time instant
![t_1 = 2 s and t_2 = 5 s](https://tex.z-dn.net/?f=t_1%20%3D%202%20s%20and%20t_2%20%3D%205%20s)
Part b)
For acceleration we know that
![a = \frac{dv}{dt}](https://tex.z-dn.net/?f=a%20%3D%20%5Cfrac%7Bdv%7D%7Bdt%7D)
![a = \frac{d}{dt}(t^2 - 7t + 10)](https://tex.z-dn.net/?f=a%20%3D%20%5Cfrac%7Bd%7D%7Bdt%7D%28t%5E2%20-%207t%20%2B%2010%29)
![a = 2t - 7](https://tex.z-dn.net/?f=a%20%3D%202t%20-%207)
now at t = 2
![a_1 = 2*2 - 7 = -3 m/s^2](https://tex.z-dn.net/?f=a_1%20%3D%202%2A2%20-%207%20%3D%20-3%20m%2Fs%5E2)
also at t=5
![a_2 = 2*5 - 7 = 3 m/s^2](https://tex.z-dn.net/?f=a_2%20%3D%202%2A5%20-%207%20%3D%203%20m%2Fs%5E2)
The answer is the last choice, the particle nature of light. The compton effect showed that a charged electron scatters the photon results in decreased energy but increase in wavelength.
Answer:
The relationship between temperature and kinetic energy is directly proportional.
Explanation:
The temperature is directly proportional to the kinetic energy of the gas molecules. We know that kinetic energy is the energy due to the motion and when gas molecules absorbs heat, they move with more speed and the kinetic energy of particles increases as a result.
According to the kinetic theory of gases
K = 3/2RT/Na
Where K is the average kinetic energy of gas molecules, T is the temperature of the gas, Na is Avogadro's number and R is the universal gas constant.
Answer:
water temperatures and global wind is correct dont listen to the other one i got it incorrect because of them
Explanation:
Answer:
In the visible spectrum of light, the color of the light depends on the frequency. The visible spectrum is always the same for a rainbow or the separated light from a prism. The order of colors is red, orange, yellow, green, blue, indigo, and violet.
Explanation: