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lawyer [7]
4 years ago
9

You suspect that a wire is defective but can't see a break in it. Explain how measuring the resistance of the wire can tell you

if it has a break.
Physics
1 answer:
Rzqust [24]4 years ago
3 0
If you measure the resistence of the wire to see if it really has a break because like for instance my dad was fixing a wire but it didn't work so he try disconnecting it and putting it somewhere else but it still didn't work then he plug it and see if would zap him but it didn't so that made the conlcusion that the wire was defective!
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A farmer lifts his hay bales into the top loft of his barn by walking his horse forward with a constant velocity of 1 ft/s. Dete
Lesechka [4]

Answer:

The velocity of the hay bale is - 0.5 ft/s and the acceleration is 6.25\times 10^{- 3} ft/s^{2}

Solution:

As per the question:

Constant velocity of the horse in the horizontal, v_{x} = 1 ft/s

Distance of the horse on the horizontal axis, x = 10 ft

Vertical distance, y = 20 ft

Now,

Apply Pythagoras theorem to find the length:

20^{2} + 10^{2} = l^{2}

l^{2}= 500

Now,

x^{2} + y^{2} = 500                            (1)

Differentiating equation (1) w.r.t 't':

2x\frac{dx}{dt} + 2y\frac{dy}{dt} = 0

x\frac{dx}{dt} = - y\frac{dy}{dt}

where

\frac{dx}{dt} = Rate of change of displacement along the horizontal

\frac{dy}{dt} = Rate of change of displacement along the vertical

v_{x} = velocity along the x-axis.

v_{y} = velocity along the y-axis

xv_{x} = -yv_{y}

v_{y} = - 10\times \frac{1}{20} = - 0.5 ft/s

|v_{y}| = 0.5\ ft/s

Acceleration of the hay bale is given by the kinematic equation:

v_{y}^{2} = u_{y} + 2ay

(-0.5)^{2} =0 + 2ay

0.25 = 2ay

\frac{0.25}{2y} = a

a = \frac{0.25}{2\times 20} = 6.25\times 10^{- 3} ft/s^{2}

7 0
3 years ago
What is the displacement of the runner, whose velocity versus time graph is shown in the Figure, in the first 15.5 s?
muminat

Answer:

10 displacement of the runner

6 0
3 years ago
3. Do Newton's Laws of Motion apply to a Water Spout? If so, how?
PSYCHO15rus [73]
Yes it’s spills out becasue bucket
6 0
3 years ago
How does the energy moves from the suns core to the photosphere?
Minchanka [31]

Answer: Energy from the core travels by radiation through the radiative

zone, then by convection through the convection zone.

Explanation:

4 0
3 years ago
The windowpanes are___________ a. opaque b. transparent c. absorbent .
kogti [31]

Answer:

The windowpanes are- transparent.

The color of the panes are due to the wavelengths of light that the glass- allows to pass through

Explanation:

Just answered the question.

4 0
4 years ago
Read 2 more answers
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