Two cars approach an extremely icy four-way perpendicular intersection. car a travels northward at 26 m/s and car b is traveling eastward. they collide and stick together, traveling at 12o north of east. what was the initial velocity of car b? you may assume that the cars have the same mass. round your answer to one decimal place.

Aphysical change is a change in the size, shape,, or stafe of matter true or false

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?

Modern physics a photon emitted from an excited hydrogen atom has an energy of 3.02 electron volts. which electron energy-level transition would produce this photon? a. n=1 to n=6 b. n=2 to n=6 c. n=6 to n=1 d. n=6 to n=2 i chose b but the correct answer is d can someone tell me why? and what's the difference?