If the circumference of the Earth is 40,075 km and the diameter of a basketball is 0.2385 m, how many basketballs would it take to circle the globe once?

Aperson stands on a platform, initially at rest, that can rotate freely without friction. the moment of inertia of the person plus the platform is ip. the person holds a spinning bicycle wheel with its axis horizontal. the wheel has moment of inertia iw and angular velocity ωw. take the ωw direction counterclockwise when viewed from above. part a what will be the angular velocity ωp of the platform if the person moves the axis of the wheel so that it points vertically upward?

What are similarities and differences between refraction, reflection, diffraction and absorption?

If angle "a" is 25°, angle "b" is: a) equal to angle c b) less than angle c c) greater than angle c