An electric train move from rest with a uniform acceleration of 1.5 m per second square for the first 10 seconds and then continue accelerating at 0.5 m per second square for a further 20 seconds continue at a constant speed and finally take 30 seconds to decelerate uniformly . (a) draw a graph of Speed against time for the drawing
(b) from your graph or otherwise did use the total distance traveled
(c) what is the average speed of the train for the whole average ​

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

While the change in blank will remain the same during a collision, the force needed to bring an object to a stop can be blank if the time if collision is blank

Which of the following is a direct benefit of the use of assembly lines in production a. laws against theft fraud and coercion are needed to protect free choice. b. the government needs to plan efficient outcomes. c. competition among producers by itself cannot ensure a wide range of consumer choices. d. works pressure the government to guarantee minimum wages