A cart of mass m moves tot he right on frictionless track at speed v1. The cart collides and sticks to another cart moving to the right at speed v2 with mass 3m. Which of the following quantities are conserved during the collision?

A) kinetic energy is conserved
B) Both momentum and kinetic energy are conserved
C) momentum is conserved

If 21.2 kcals of energy is released by this reaction, how many kj does the reaction release? (1 cal 4.184 j)

Which of the following statement is false

An ideal otto cycle has a compression ratio of 8. at the beginning of the compression process, air is at 95 kpa and 27°c, and 750 kj/kg of heat is transferred to air during the constant-volume heat-addition process. assuming constant specific heats at room temperature, determine (a) the pressure and temperature at the end of the heat-addition process, (b) the net work output, (c) the thermal efficiency, and (d) the mean effective pressure for the cycle. (4390 kpa, 1730 k; 423 kj/kg; 56.4%; 534 kpa)