Aspaceship is traveling at a speed of 15000 km/s from planet b toward planet a the spaceship sends out a signal with a wavelength og 4 nm if astronomers living on planets a and b measure the radio waves coming from the spaceship what wavelengths will they measure?

of

Astronomers living on planets a measure λO = 3.80_nm

Astronomers living on planets b measure λO = 4.2_nm

Explanation:

Astronomers living on planets a measure λO = 3.80_nm

Astronomers living on planets b measure λO = 4.2_nm

a.) Speed of the radio wave

c = 299792458 m/s.

λO = λS(c − vS)/(c − vO)

λO = observed wavelength

λS = source constant wavelength = 4 nm

c = wavefront constant velocity = 299792458 m/s

vS = velocity of the source = 15000 km/s

vO = velocity of the observer 0

emily ruth's annual premium is $1058.50

step-by-step explanation:

emily ruth is a female of 27 years age purchasing 20 year endowment insurance with face value $25000.

from the given table,

for females, the age of a male 3 years younger should be used.

so, we have to check for 24 year male for 20 year endowment.

it is 42.34 for every $1000 face value.

for a face value of $25000,

it is 25 * 42.34 = $1058.50

∴ emily ruth's annual premium is $1058.50