One ball is dropped vertically from a window. at the same instant, a second ball is thrown horizontally from the same window. which ball has the greater speed at ground level?

a. neither—they both have the same speed on impact.

b. it depends on how hard the ball was thrown.

c. the dropped ball.

d. the thrown ball.

d-The thrown ball

Explanation:

Given

First ball is dropped from window at a height suppose h

therefore velocity of ball at the ground

second ball is thrown horizontally suppose with a velocity of u therefore taking horizontal and vertical motion separately

horizontal velocity will remain same as there is no gravity in horizontal direction

vertical velocity at ground of second ball

horizontal velocity is u

net velocity will be

thus velocity of second ball be more as compared to first

r=rho l/a where a is the area, l is the length and rho is resistivity so the greater the area the lesser the resistance thats why the earth pin is thicker bcos current follow the shortest path, so less resistive .

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2