A person wearing -1.5 D eyeglasses 2.5 cm in front of her eyes is looking at the night sky. If her retina is 2.0 cm behind her eye lens, what should the focal length of the eye lens be for her to see the stars clearly

Ahorizontal wire is tied to supports at each end and vibrates in its second-overtone standing wave. the tension in the wire is 5.00 n, and the node-to-node distance in the standing wave is 6.28 cm. (a) what is the length of the wire? (b) a point at an anti- node of the standing wave on the wire travels from its maximum upward displacement to its maximum downward displacement in 8.40 ms. what is the wire's mass?

Aray of light traveling parallel to the principal axis of a concave mirror will be reflected through the mirror's

Why does a collision with an airbag cause less damage than a collision with a steering wheel