1. There are stars whose brightness varies periodically. These stars are called pulsating stars. An astronomer hypothesizes that the time taken t for the star to undergo one oscillation depends on the star’s density ρ, the star’s radius r and Newton’s Gravitational constant G. Newton’s Gravitational constant G has dimensions M-1L3T-2. A. i. State the dimension of t.
ii. Determine the dimension of ρ.
iii. State the dimension of r.
B. Use dimensional analysis to predict the form of the equation for the time taken t for the star to undergo one oscillation. Include all steps and assumptions made.

d₁ = displacement of tern from arctic to antarctic = 11000 miles

d₂ = displacement of tern from antarctic to arctic =   - 11000 miles

d = total displacement for the journey

total displacement for the journey is given as

d = d₁ + d₂

d = 11000 + (-11000)

d = 0 miles

t₁ = time of travel from arctic to antarctic = 3 months = 3 x 30 days = 90 days

t₂ = time of travel from antarctic to arctic = 3 months = 3 x 30 days = 90 days

t = total time of travel

total time of travel is given as

t = t₁ + t₂

t = 90 + 90

t = 180 days

average velocity is given as

average velocity = total displacement/ total time

v = d/t

v = 0/180

v = 0 miles/day

i think the answer is a, hope this : )

the answer is ampere

the ampere is used to measure electricity. an ampere is a unit of electric current equal. a unit of measure for the flow of current in a circuit. one ampere is the amount of current flow provided when one volt of electrical pressure is applied against one ohm of resistance.

the components of a vector are the parts of the vectors that are to each other.

b perpendicular