(35 points)Take a stone/ pebble and tie it on a string. Perform an activity to investigate the variation of the time period with the length of the pendulum. Follow these steps to complete investigation

Aim

Hypothesis

Materials required

procedure

Observation

conclusion

Use the table to answer question 22 23 and 24.

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

Describe how the motion of a spring being pushed forward and backward is similar to the motion of air particles in a sound wave.