Answer:
The potential energy can be given as
E = mgh. m is mass, g = acceleration due to gravity = 9.8m/s, h is the heigh, given as 100.0m
E = m x 9.8 x 100 = (980m)J
E = (980m)/10^9GJ = (0.000000980m)GJ to 3 significant figures
Explanation:
Hydroelectric dams exploit storage of gravitational potential energy. A mass, m, raised a height, h against gravity, g = 9.8 m/s², is given a potential energy E = mgh. The result will be in Joules if the input is expressed in meters, kilograms, and seconds (MKS, or SI units).
15+3=18km/hour
Think about it like this. The boat is going 15 faster than the river, and the river is going 3 faster than the bank, so the boat is going 18 faster than the river bank
The trough. The crest is compressed.
Dr. Albert gets a spark from the static in the door knob. He is not hurt. However, the electric current is high.
What is the static spark?
Sparks that are considered "static" have a massive momentary current and power (momentary like less than a millionth of a second.) However, the overall wattage of these sparks is exceedingly low. It's really too little to harm your muscles with heat (or even any warming a thermometer could detect.)
Negative and positive charges in an object must balance out for static electricity to occur. These charges may accumulate on an object's surface until they can be released or discharged. They can be discharged via a circuit, for example.
Learn more about static spark here:
brainly.com/question/4045527
#SPJ4
Answer:
a piece of equipment with moving parts that does work when it is given power from electricity, gasoline, etc.
Explanation:
Have A Wonderful Day !!