A coal barge with a mass of 2.36 × 10^4 kg drifts along a river. When it passes under a coal hopper, it is loaded with 9.4 × 10^3 kg of coal. What is the speed of the unloaded barge if the barge after loading has a speed of 2.7 m/s?

Avoltaic cell converts chemical energy to

Which of the following is a true statement about the acceleration ~a of the pendulum bob ~a is equal to the acceleration due to gravity. ~a is perpendicular to the bob’s trajectory. ~a is equal to the instantaneous rate of change in velocity. ~a is tangent to the bob’s trajectory.

What is the answer to these problems 30 pt