Convert 3.8 kg to Lbs

An object has a weight of 500 on earth what is the mass of this object

The mini-refrigerator fire was most likely caused by what type of wiring?

Light traveling in water, nwater = 1.33, strikes a plastic block at an angle of incidence of 51.4°; part of the beam is reflected and part is refracted. if the index of refraction of the plastic is 2.0, what is the angle made by the reflected and refracted beams?