PICTURE INCLUDED, DUE TONIGHT, NEED TO CONFIRM ANSWER A child of mass 50 kg swings down in a circular arc on a rope that is 2 m long. At the bottom

of the swing, she has a tangential speed of 8 m/s. The net centripetal force on the child at the

bottom of the swing is most nearly

(A) 1600 N (B) 800 N (C) 320 N (D) 200 N

2. For the same child as the previous problem, at the instant that she is at the bottom of the swing,
the direction of the centripetal force will be
(A) up. (B) down. (C) right. (D) left.

Alinearly polarized electromagnetic wave has an average intensity of 196 w/m^2. this wave is directed towards two ideal polarizers (in real polarizers, transmission is also effected by reflection and absorption). polarizer a is oriented with its transmission axis at an angle of θ_1=20.8∘ with the incident electric field. polarizer b has its axis at an angle of θ_2=63.0∘ with the incident electric field. what is the average intensity of the wave after it passes through polarizer a? what is the average intensity of the wave after it passes through polarizer b? suppose that the two polarizers a and b are interchanged. what would the average intensity be after passing through both polarizers?

Critical mass is the of material required to produce a chain reaction. a.) minimum amount b.) atomic mass c.) precise amount d.) maximum amount

Hen a gfci receptacle device is installed on a 20-ampere branch circuit (12 awg copper), what is the minimum volume allowance (in cubic inches) required for conductor fill for each conductor in the outlet box?