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Vanyuwa [196]
4 years ago
10

True or false when a person swims through water no work is done

Physics
2 answers:
ozzi4 years ago
8 0

Answer:

False

Explanation:

First we need to know the definition of work.

Work is done when a body moves through a distance with an applied force.

When swimming in water, you exert a force while moving through a distance. Therefore, work is done!

sweet [91]4 years ago
4 0
False, work is when a force is exerted
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There are three long parallel wires arranged so that, in cross-section, they occupy the points of an equilateral triangle. Is th
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Answer:

Yes, there is such a way.

Explanation:

If currents flow in the same direction in two or more long parallel wires, there will be an attractive force between the wires. If the current flows in different directions, there will be a repulsive force between the wires. In this case, these three parallel wires, can be be made to carry current in the same direction, creating an attractive force between all three wires.

Note that it is not possible to have at the least one of them carry current in the opposite direction and still have an attractive current between them.

8 0
3 years ago
The 400-turn primary coil of a step-down transformer is connected to an ac line that is 120 V rms. The secondary coil voltage is
KengaRu [80]

Explanation:

The given data is as follows.

             V_{1} = 120 V,    V_{2} = 6.50 V

             N_{1} = 400,     N_{2} = ?

Formula to calculate the number of turns in secondary coil are as follows.

          \frac{N_{1}}{N_{2}} = \frac{V_{1}}{V_{2}}

Putting the given values into the above formula as follows.

         \frac{N_{1}}{N_{2}} = \frac{V_{1}}{V_{2}}

        \frac{400}{N_{2}} = \frac{120}{6.50}

              N_{2} = 21.66

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Thus, we can conclude that number of turns in the secondary coil are 22.

3 0
3 years ago
Help I need a answer to this
natta225 [31]

Answer:

1700 Joules

Explanation:

Work=force x distance

Force = 170 kg

Distance= 10 Meters

170 x 10 = 1700 Joules of work

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