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statuscvo [17]
3 years ago
5

calculate the work done by a girl of mass 40 kg when she climbs a stair case of 20 steps each of height 10 cm and acceleration i

s 10Nkg^-1​
Physics
2 answers:
Volgvan3 years ago
5 0

Answer:

i think its a 800x² hope you like it

TEA [102]3 years ago
3 0

Answer:

8964

Explanation:

465

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How much energy is stored in the electric field of a 50-μm-diameter cell with a 7.0-nm-thick cell wall whose dielectric constant
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A spring does 5.0 J of work on a 0.10-kg ball bearing in a pinball machine. The ball's
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10m/s

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3 years ago
Points a and b lie in a region where the y-component of the electric field is Ey=α+β/y2. The constants in this expression have t
Drupady [299]

Answer:

V_{a} - V_{b} = 89.3

Explanation:

The electric potential is defined by

         V_{b} - V_{a} = - ∫ E .ds

In this case the electric field is in the direction and the points (ds) are also in the direction and therefore the angle is zero and the scalar product is reduced to the algebraic product.

         V_{b} - V_{a} = - ∫ E ds

We substitute

         V_{b} - V_{a} = - ∫ (α + β/ y²) dy

We integrate

          V_{b} - V_{a} = - α y + β / y

We evaluate between the lower limit A  2 cm = 0.02 m and the upper limit B 3 cm = 0.03 m

           V_{b} - V_{a} = - α (0.03 - 0.02) + β (1 / 0.03 - 1 / 0.02)

            V_{b} - V_{a} = - 600 0.01 + 5 (-16.67) = -6 - 83.33

            V_{b} - V_{a} = - 89.3 V

As they ask us the reverse case

             V_{b} - V_{a} = - V_{b} - V_{a}

             V_{a} - V_{b} = 89.3

3 0
3 years ago
A study group is meeting to prepare for an upcoming social studies test on the Civil War. Which question would you
Rainbow [258]

Answer:

What were the most important reasons that the Civil War started?

Explanation: i got it correct

4 0
3 years ago
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I need help thank you​
Brums [2.3K]

Answer:

D

Explanation:

3 0
2 years ago
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