Question

An artificial satellite is moving in a circular orbit of radius 42000 km. It takes 20 hours to revolve around the earth. A) What will be the diameter of circular orbit?Required to answer. Single choice.

(2 Points)

92000 Km

84000 Km

63000 Km

4500Km

34.B) What will be the circumference of the circular orbit?Required to answer. Single choice.

(1 Point)

494,600km

264,000 km

400,789 km

128,741 km

35.C) What will be the speed of satellite?Required to answer. Single choice.

(1 Point)

13200 km/h

75,450 km/h

41,000 km/h

95,500 km/h​

Answer 1

Answer:

ANSWER

pH is the negative log of H

+

concentration

i.e pH=−log[H

+

]

pH=−log(3.8×10

−3

)=−[log3.8+log 10

−3

]=2.42