The institute of space and astronautical science in japan proposes to place a radio telescope into an even higher orbit than the halca telescope. using this telescope in concert with a ground-based radio telescope, baselines as long as 25,000 km may be obtainable. astronomers want to use this combination to study radio emission at a frequency of 43 ghz from the molecule silicon monoxide, which is found in the interstellar clouds from which stars form. (1 ghz = 1 gigahertz = 109 hz.) (a) what is the wavelength of this emission? (b) taking the baseline to be the effective diameter of this radio-telescope array, what angular resolution can be achieved?

0.00697 m

Explanation:

c = Speed of light =

f = Frequency of the wave = 43 GHz =

Wavelength is 0.00697 m

Angular resolution

D = Diameter of the telescope = 25000000 m

The angular resolution of the telescope is

i had this question and the answer was 3.15 miles.

martina travels from school to her mom's office. from there, she walks to school. after school, she walks to the library and then to a friends house before finally ending back at home. find martina's total distance traveled.

a) 0 miles  

b) 0.4 miles  

c) 1 mile  

d) 3.15 miles

the minimum constant speed at which she can catch the train is 2.7 m/s

given:

acceleration = 0.6

time = 4.5 s

to find:

velocity = ?

formula used:

from 1st kinematic equation we get,

v = u + at

u = initial speed of train = 0 m/s

v = final speed of the train

a = acceleration of the train

t = time

solution:

from 1st kinematic equation we get,

v = u + at

u = initial speed of train = 0 m/s

v = final speed of the train

a = acceleration of the train

t = time

v = 0 + (0.6 × 4.5)

v = 2.7 m/s

the minimum constant speed at which she can catch the train is 2.7 m/s