Acamera lens used for taking close-up photographs has a focal length f. the farthest the lens can be placed from the film is do. a) write an expression for the shortest distance at which this camera can be positioned from an object and still have it in focus. b) what formula gives the magnification of the closest possible object?

Awave has a wavelength of 7 mm and a frequency of 19 hertz. what is its speed?

You are doing a science experiment with a fahrenheit thermometer. your data must be in degrees celsius. if you measure a temperature of 125°f, what is this temperature in degrees celsius

Suppose that a mass of 2 kg is attached a spring whose spring constant is 50. the system is damped such that b = 12 . the mass is set in motion with an initial velocity of -8 m/s at a position 0 meters from equilibrium. set up and solve a differential equation that models this motion. write your solution in the form a cos ( ω t − α ) where α is a positive number. use your solution to fill in the information below: what is the amplitude of the motion? what is the value of ω ? what is the phase shift?