Helium in the amount of moles 4 expands in the process 1-2. The temperature of helium in state 1 is and in state 2 it is 400 K. How much heat is delivered to helium in the process 1-2? The universal gas constant is 8.31 J/(mol. K).

Crowbar of 5 metre is used to lift an object of 800 metre if the effort arm is 200cm calculate the force applied

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

Calculate the first and second velocities of the car with four washers attached to the pulley, using the formulas v1 = 0.25 m / t1 , and v2 = 0.25 m / (t2 – t1) where t1 and t2 are the average times the car took to reach the 0.25 and the 0.50 meter marks. record these velocities, to two decimal places, in table e.