Answer:
1,920 Joules
Explanation:
K.E. = 1/2 mv2
so K.E. = 1/2 (60)(8x8) = 1,920 Joules
Answer:
a. 1100 meters.
b. Between B and C
c.1. Between point D and E
c2. Between point D and E
d. 3.7 m/s.
Explanation:
The girl travels the distance of 1100 meters from starting to the end. There is no motion occurs between B and C due to no change of distance value from 200 meters. Between point D and E, the girls covers 500 meters long distance and also covers fastest distance between point D and E because between point D and E, the girl covers 500 meters distance in 30 seconds which is the highest of all. The average speed of the girls is 3.7 meter/seconds if we divide total distance i.e. 1100 meters by time which is 300 seconds.
Answer:
Temperature will be 305 K
Explanation:
We have given The asteroid has a surface area ![A=7.70m^2](https://tex.z-dn.net/?f=A%3D7.70m%5E2)
Power absorbed P = 3800 watt
Boltzmann constant ![\sigma =5.67\times 10^{-8}Wm/K^4](https://tex.z-dn.net/?f=%5Csigma%20%3D5.67%5Ctimes%2010%5E%7B-8%7DWm%2FK%5E4)
According to Boltzmann rule power radiated is given by
![P=\sigma AT^4](https://tex.z-dn.net/?f=P%3D%5Csigma%20AT%5E4)
![3800=5.67\times 10^{-8}\times 7.70\times T^4](https://tex.z-dn.net/?f=3800%3D5.67%5Ctimes%2010%5E%7B-8%7D%5Ctimes%207.70%5Ctimes%20T%5E4)
![T^4=87.0381\times 10^8](https://tex.z-dn.net/?f=T%5E4%3D87.0381%5Ctimes%2010%5E8)
![T=305K](https://tex.z-dn.net/?f=T%3D305K)
So temperature will be 305 K
Answer:
a) 1.73*10^5 J
b) 3645 N
Explanation:
106 km/h = 106 * 1000/3600 = 29.4 m/s
If KE = PE, then
mgh = 1/2mv²
gh = 1/2v²
h = v²/2g
h = 29.4² / 2 * 9.81
h = 864.36 / 19.62
h = 44.06 m
Loss of energy = mgΔh
E = 780 * 9.81 * (44.06 - 21.5)
E = 7651.8 * 22.56
E = 172624.6 J
Thus, the amount if energy lost is 1.73*10^5 J
Work done = Force * distance
Force = work done / distance
Force = 172624.6 / (21.5/sin27°)
Force = 172624.6 / 47.36
Force = 3645 N
Answer:
a.If we increase the wind velocity, the maximum vertical dispersal height will decrease, while the rate of diffusion will increase
b.If we increase the humidity, the maximum vertical dispersal height will increase after 24 hours.
c.If we increase the lapse rate, the maximum vertical dispersal height of the pollutants will increase
Explanation:
a.If we increase the wind velocity, the maximum vertical dispersal height will decrease, while the rate of diffusion will increase
b.If we increase the humidity, the maximum vertical dispersal height will increase after 24 hours.
c.If we increase the lapse rate, the maximum vertical dispersal height of the pollutants will increase