Answer:
2,8
Explanation:
The first electron shell would have 2 electrons, the second shell would have 8 electrons. This is because Neon has a relative charge of 10.
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:
If and , then:
The center of mass of the Earth-Moon system is 4.673 kilometers away from center of Earth.
Answer:
4.80 seconds
Explanation:
The velocity of sound is obtained from;
V= 2d/t
Where;
V= velocity of sound = 329.2 ms-1
d= distance from the wall = 790.5 m
t= time = the unknown
t= 2d/V
t= 2 × 790.5/ 329.2
t= 4.80 seconds
Kinetic energy is calculated as such: | therefore,
Answer:
The car appears to be moving 30 km/hr in the opposite direction of the bus.
Explanation: