Why doesn't the principle of mechanical energy conservation hold in situations when friction forces are present?

A piece of news published before a rival newspaper can publish it is called a (n).

An electric heating element is connected to a 110 V circuit and a current of 3.2 A is flowing through the element. How much energy is used up during a period of 5 hours by the element

How many seconds (in the NBA) does a team have to shoot the ball when they are on offense? 35 seconds 24 seconds 45 seconds

Authors of a new study, published in the Journal of the American Medical Association, noted that older people with better cardio-respiratory fitness appear to live longer than unfit ones. Better cardio-respiratory fitness can be linked directly to

What is the minimum size aluminum main bonding jumper (wire type) for service if the largest ungrounded service conductor is 5000 circular mil copper 3/0 AWG T/F

What causes an air conditioned to turn on

A turntable is spinning on a frictionless axle when a ball of putty is dropped onto it from above. The putty sticks to the turntable when it lands. Is angular momentum conserved for the turntable and putty (the system) during this process?

The speedof a boat in still water is v. The boat is to make a round-trip ina river whose current travels at speed u.

Why are there so few working wave power stations?

Two abiotic factor that effect an ecosystem are;