A child is playing hook-a-duck. The mass of each duck is 50 g. The line has a spring constant of 500 N/m. Calculate the weight of the rubber duck. (Take g = 10 N/kg)
Calculate the extension of the line when a duck is hooked.

Astone dropped into a well is heard to strike the water after 8seconds. find the depth of the well if the velocity of sound is 350m/s

Two polarizers are oriented at 40∘ to each other and plane-polarized light is incident on them. if only 16 percent of the light gets through both of them, what was the initial polarization direction of the incident light?

How does the kinetic energy of a charge change as the charge moves under the effect of an electric field from higher potential to lower potential? a. the kinetic energy increases. b.the kinetic energy decreases. c.the kinetic energy remains the same. d.the kinetic energy is always zero.