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  3. 1. if a concave mirror has a focal length of 20 cm

1. If a concave mirror has a focal length of 20 cm, at which object distance...

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Physics

1. If a concave mirror has a focal length of 20 cm, at whichobject distance will an image larger than objects be formed onscreen?

a.) 40 cm b.) 30 cm c.) none of the choices d.) 14 cm e.) 50cm

2. An electron and proton are projected with the same velocitywhen a uniform magnetic field perpendicular to the velocity of thetwo charges is applied. The electron follows a circular path ofradius 1 mm. What is the radius of the proton's path?

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