An official major league baseball has a mass of 0.14 kg. A pitcher throws a 40 m/s fastball, which is hit by the batter straight back up the middle at a speed of
46 m/s.
a) What is the impulse of the ball during the collision with the bat?
b) If this collision occurs during a time of 0.012 seconds, what is the average
force exerted by the bat on the ball?

Which of the following is not am example of a polymer? protein nylon kevlar concreta

Apair of 10μf capacitors in a high-power laser are charged to 1.7 kv.a. what charge is stored in each capacitor? b. how much energy is stored in each capacitor?

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