Parallaxes are measured in fractions of an arcsecond. one arcsecond equals 1/60 arcmin; an arcminute is, in turn, 1/60th of a degree (°). to get some idea of how big 1° is, go outside at night and find the big dipper. the two pointer stars at the ends of the bowl are 5.5° apart. the two stars across the top of the bowl are 10° apart. (ten degrees is also about the width of your fist when held at arm’s length and projected against the sky.) mizar, the second star from the end of the big dipper’s handle, appears double. the fainter star, alcor, is about 12 arcmin from mizar. for comparison, the diameter of the full moon is about 30 arcmin. the belt of orion is about 3° long. keeping all this in mind, why did it take until 1838 to make parallax measurements for even the nearest stars?

the independent variable, the one that is intentionally manipulated, is whether or not the car hits the barrier.

the dependent variable, the one that you measure the response in, is the distance that the washers travel.

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

when jerome paddle in flowing river towards east the net speed of jerome will increase

so the net speed of jerome will be given as

now the speed of paul will be same as it is given as he is running on the ground

so

so here we can say since the speed of jerome is more so he will win the race

now as we know the distance so the time difference is given as

so jerome will reach first and the time difference will be 203.55 s or 3.4 min