Please help in 5 mintues Which component uses the core muscles of your stomach?

a. Muscular endurance
b. Flexibility
c. BMI
d. Abdominal endurance

In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j ?

If the speed of a particle triples ,by what factor does its kinetic energy increase?

If the wheels lock when braking suddenly the vehicle: a: loses traction b: lose steering wheel ability c: gain speed slightly d: gain steering ability