Answer:
☆<《<em><u>HOPE IT WILL HELP YOU</u></em><em><u> </u></em>》>☆
Explanation:
The probability of getting 4 is 1
Answer:
4. All of the above
Explanation:
The purpose of striking the ball in a volleyball game:
From the serve you could state that you need to place the ball in motion.
When returning a shot of, you normally want to change the direction of the ball's motion.
During a dropshot, you purposely want to slow down the ball's motion.
The correct answer must be all of the above.
Answer:
The center of mass of the Earth-Moon system is 4.673 kilometers away from center of Earth.
Explanation:
Let suppose that planet and satellite can be treated as particles. The masses of Earth and Moon (
,
) are
and
, respectively. The distance between centers is 384,403 kilometers. The location of the center of mass can be found by using weighted averages:
![\bar x = \frac{x_{E}\cdot m_{E}+x_{M}\cdot m_{M}}{m_{E}+m_{M}}](https://tex.z-dn.net/?f=%5Cbar%20x%20%3D%20%5Cfrac%7Bx_%7BE%7D%5Ccdot%20m_%7BE%7D%2Bx_%7BM%7D%5Ccdot%20m_%7BM%7D%7D%7Bm_%7BE%7D%2Bm_%7BM%7D%7D)
If
and
, then:
![\bar x = \frac{(0\,km)\cdot (5.972\times 10^{24}\,kg)+(384,403\,km)\cdot (7.349\times 10^{22}\,kg)}{5.972\times 10^{24}\,kg+7.349\times 10^{22}\,kg}](https://tex.z-dn.net/?f=%5Cbar%20x%20%3D%20%5Cfrac%7B%280%5C%2Ckm%29%5Ccdot%20%285.972%5Ctimes%2010%5E%7B24%7D%5C%2Ckg%29%2B%28384%2C403%5C%2Ckm%29%5Ccdot%20%287.349%5Ctimes%2010%5E%7B22%7D%5C%2Ckg%29%7D%7B5.972%5Ctimes%2010%5E%7B24%7D%5C%2Ckg%2B7.349%5Ctimes%2010%5E%7B22%7D%5C%2Ckg%7D)
![\bar x = 4.673\,km](https://tex.z-dn.net/?f=%5Cbar%20x%20%3D%204.673%5C%2Ckm)
The center of mass of the Earth-Moon system is 4.673 kilometers away from center of Earth.
90 percent a day to keep things running smoothly
Answer:
![V_2 = 0.125 m^3](https://tex.z-dn.net/?f=V_2%20%3D%200.125%20m%5E3)
Work done = = 5 kJ
Explanation:
Given data:
volume of nitrogen ![v_1 = 0.08 m^3](https://tex.z-dn.net/?f=%20v_1%20%3D%200.08%20m%5E3)
![P_1 = 150 kPa](https://tex.z-dn.net/?f=P_1%20%3D%20150%20kPa)
![T_1 = 200 degree celcius = 473 Kelvin](https://tex.z-dn.net/?f=T_1%20%3D%20200%20degree%20celcius%20%3D%20473%20Kelvin)
![P_2 = 80 kPa](https://tex.z-dn.net/?f=P_2%20%3D%2080%20kPa)
Polytropic exponent n = 1.4
![\frac{T_2}{T_1} = [\frac{P_2}{P_1}]^{\frac{n-1}{n}](https://tex.z-dn.net/?f=%5Cfrac%7BT_2%7D%7BT_1%7D%20%3D%20%5B%5Cfrac%7BP_2%7D%7BP_1%7D%5D%5E%7B%5Cfrac%7Bn-1%7D%7Bn%7D)
putting all value
![\frac{T_2}{473} = [\frac{80}{150}]^{\frac{1.4-1}{1.4}](https://tex.z-dn.net/?f=%5Cfrac%7BT_2%7D%7B473%7D%20%3D%20%5B%5Cfrac%7B80%7D%7B150%7D%5D%5E%7B%5Cfrac%7B1.4-1%7D%7B1.4%7D)
![\frac{T_2} = 395.23 K = 122.08 DEGREE \ CELCIUS](https://tex.z-dn.net/?f=%5Cfrac%7BT_2%7D%20%3D%20395.23%20K%20%3D%20122.08%20DEGREE%20%5C%20CELCIUS)
polytropic process is given as
![P_1 V_1^n = P_2 V_2^n](https://tex.z-dn.net/?f=P_1%20V_1%5En%20%3D%20P_2%20V_2%5En)
![150\times 0.08^{1.4} = 80 \times V_2^{1.4}](https://tex.z-dn.net/?f=150%5Ctimes%200.08%5E%7B1.4%7D%20%3D%2080%20%5Ctimes%20V_2%5E%7B1.4%7D)
![V_2 = 0.125 m^3](https://tex.z-dn.net/?f=V_2%20%3D%200.125%20m%5E3)
work done ![= \frac{P_1 V_1 -P_2 V_2}{n-1}](https://tex.z-dn.net/?f=%3D%20%5Cfrac%7BP_1%20V_1%20-P_2%20V_2%7D%7Bn-1%7D)
![= \frac{150 \times 0.8 - 80 \times 0.125}{1.4-1}](https://tex.z-dn.net/?f=%3D%20%5Cfrac%7B150%20%5Ctimes%200.8%20-%2080%20%5Ctimes%200.125%7D%7B1.4-1%7D)
= 5 kJ