An underground explosion generates sound waves that travel through solid rock, then through a lake, and then air. Describe how the speed of the waves will change during this journey and explain why.

When is a current produced? when the terminals of an electrochemical cell are connected by a wire if the electric circuit is opened in an electrochemical cell if the electrolyte is removed from an electrochemical cell when the electrodes are reversed in an electrochemical cell

Astudent weighing 700 n climbs at constant speed to the top of an 8 m vertical rope in 10 s. the average power expended by the student to overcome gravity is most nearly

See the attachment and solve question 5th