Ariver flows due east at 2.33 m/s. a boat crosses the river from the south shore to the north shore by maintaining a constant velocity of 9.76 m/s due north relative to the water. the river is 212 m wide. what is the velocity of the boat relative to shore? answer in units of m/s.

V = 10.03 m/s

Explanation:

It is given that,

Velocity of the river, v₁ = 2.33 m/s

Velocity of the boat, v₂ = 9.76 m/s

Width of the river, d = 212 m

Let v is the velocity of the boat relative to the shore. It can be calculated using vector sum as :

v = 10.03 m/s

So, the velocity of the boat relative to shore is 10.03 m/s. Hence, this is the required solution.

the answer is b, have negligible mass

answer;

d. are made mostly of liquid

explanation;

-the general   composition and structure planets includes; they have a thick gas and liquid layer covering a small,solid core. mostly the gases are hydrogen and helium atmosphere and layers of liquid hydrogen. for instance neptune and uranus are examples of the outer planets, they have a core covered by ice and ammonia.

-neptune's atmosphere is hydrogen and helium with a bit of methane so there is no oxygen to breath and the interior is made up of frozen water and ammonia with a rock and iron core. thus, there is no liquid water or solid surface to survive.