Circular. Look at a clear horizon, you'll see a curve. Go skydiving. Become smart enough, become an astronaut, go into space and look at the shape of earth yourself.
Answer: 2.13 E 4 J
Explanation: Heat absorbed = mass * specific heat capacity * change in temperature
= 0.5 * 387 * (400 - 290) J
= 0.5 * 387 * 110 J = 21285 J = 2.13 E 4 J
Each element has its own specific density. Density is a physical characteristic, it could be used to identify unknown substance because of its uniqueness. No two elements have identical densities, and densities of the same substance may it be of different volume has closely identifiable densities.
Based on what I see and the answered D But I don't know your results or your studies hope this helps you!!
Answer:
1.5mi/hr, 4.5mi/hr
Explanation:
Given:
45 min = 0.75h, 15 min = 0.25h
(1) 0.75v₁ = 0.25v₂
(2) v₁ = v₂ - 3
Solve for v₁ and v₂:
0.75(v₂ - 3) = 0.25v₂ = 0.75v₂ - 2.25 = 0.25v₂
0.5v₂ = 2.25
v₂ = 4.5
v₁ = 1.5