Interested girls should come come bad girls let's do fun here : aed-asvb-gie

#come for bad purp. ose
#come for showing and seeing​

What is the efficiency of an engine that does 80 j of work and exhausts 320 j of heat while taking in 400 j of heat ? a. 10% b. 20% c. 80% d. 25%

Amoving freight car collides with an identical one that is at rest. if momentum is conserved, what happens to the second car after the collision? it attains the same speed as the first car. it moves at half the speed of the first car. it moves at twice the speed of the first car.

How is density measured? a. area per unit weight b. weight per unit area c. volume per unit mass d. mass per unit volume