Work done to lift the rock is 6174 Joule.
To find the answer, we need to know about the work done.
<h3>What's the work done?</h3>
Mathematically, work done = force × distance
<h3>What's the gravitational force acts on the stone here?</h3>
The gravitational force on the stone = mg
= 210× 9.8= 2058N
<h3>What's the work done to lift the stone?</h3>
Work done= 2058× 3
= 6174 Joule
Thus, we can conclude that the work done to lift the stone is 6174 Joule.
Learn more about the work done here:
brainly.com/question/25573309
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The image distance is 59.2 cm and the image is real and small.
<h3>
Image distance</h3>
The distance of the image formed by the convex or converging lens is determined by applying the following lens equation.
1/f = 1/u + 1/v
where;
- f is the focal length = 34 cm
- u is the object distance = 80 cm
- v is the image distance = ?
1/v = 1/f - 1/u
1/v = 1/34 - 1/80
1/v = 0.0294 - 0.0125
1/v = 0.0169
v = 1/0.0169
v = 59.2 cm
Thus, the image distance is 59.2 cm and the image is real and small.
Learn more about convex lens here: brainly.com/question/10153605
Electric fields cause electric currents in the ocean. When electromagnetic fields are induced in the conducting oceans and Earth, Ionospheric and Magnetospheric electric current systems flow above the surface of the ocean and by the action of moving sea water.
Explanation:
Time = Distance/Speed
= 96km / (30km/h)
= 3.2h. (Or 3 hours and 12 minutes)
The duck at 12m/s has a greater speed than the heron which travels at 10m/s
