Focal length is 10cm draw a ray diagram and use the ray diagram to answer the question. I will mark as brainlest

The difference between a red shift and a blue shift has to do with wavelength frequency. t or f

The necleus of an atom is made up of what subatomic particles?

This is important. 1. which of the following is an si base unit for measuring length? (2 points) inch gram meter mole 2. which of the following units for distance is an si unit? (2 points) centimeter foot inch yard 3. which of the following tools should a scientist use to measure an object in meters? (2 points) electronic balance pan balance tape measure thermometer