Does the shadow form by the sun remain the same for the whole day?why?​

When we are outside on a sunny day, we can see how our shadows change throughout the day. The Sun's position in the sky affects the length of the shadow. When the Sun is low on the horizon, the shadows are long. Due to the Earth's rotation, our view of the Sun changes throughout the day.

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a and b sometimes have a positive value

3.2x10^7