If the masses of Earth and the Moon were both doubled, by how much would the radius of the Moon's orbit about Earth have to change if its speed did not change? (Assume that rEMrEM is the mean distance between Earth and the Moon before changing of the mass, r′EMrEM′ is the mean distance between Earth and the Moon after changing of the mass.)

doubled

Explanation: for speed to remain same, the gravitational force must remain same

F= GMeMm/r²

Me: Mass of Earth

Mm: Mass of Moon

F= G×2×Me×2×Mm/r²

if r is doubled

F= G×2×Me×2×Mm/(4r²)

F= GMeMm/r²

hope it will help you

(75°f − 32) × 5/9 = 23.889°c

this is an example of "committed" time.

committed time, as contracted time, takes need over essential and available time since it is seen as profitable work. it alludes to the time allotted to keep up a home and family. at the point when a man is commuting using committed time this individual may feel that the drive is an obligation to family, for example, strolling youngsters to class or driving a mate to work. contracted and committed time clients may feel that their commute could really compare to the commute of important or leisure time clients on the grounds that their commute is profitable work. in this manner, they might be more disposed to pick a mechanized method of movement.