Question 6 of 16 How fast is a ball going when it hits the ground after being dropped from a
height of 9 m? The acceleration of gravity is 9.8 m/s2
O A. 14.9 m/s
OB. 11.5 m/s
C. 13.3 m/s
O D. 17.6 m/s

What will a positive and a negative charge do if they are separated from each other?

Positrons are spontaneously emitted from the nuclei of

Acarpenter builds an exterior house wall with a layer of wood 2.9 cm thick on the outside and a layer of styrofoam insulation 2.3 cm thick on the inside wall surface. the wood has k=0.080w/(m⋅k), and the styrofoam has k= 0.010 w/(m⋅k). the interior surface temperature is 19.0 ∘c , and the exterior surface temperature is -15.0 ∘c . a.)what is the temperature at the plane where the wood meets the styrofoam? celsius b.)what is the rate of heat flow per square meter through this wall? /m^2