Which of the following is true about the Earth's tilt? a. The Sun changes its angle throughout the year by 23.5° causing the seasons to change. b. The Earth is tilted 23.5° causing the length of days to change during the Earth's 24-hour rotation.
c. The Earth tilts back and forth like a top 23.5° every 365 days, causing the length of days to change.​

Agalvanometer has an internal resistance of 100 ω and deflects full-scale at 2.00 ma. what size resistor should be added to the galvanometer to convert it to a milliammeter capable of reading up to 4.00 ma, and how should this resistor be connected to the galvanometer?

Iwill give brainliest if you answer right : )

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?