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alexgriva [62]
4 years ago
13

Determine the time needed for the load at b to attain a speed of 10 m/s, starting from rest.

Physics
1 answer:
quester [9]4 years ago
5 0
Unfortunately, I can't give a definite answer because I only know two information: the initial velocity which is 0 because it is at rest, and the final velocity which is 10 m/s. To solve this, I should know one other information to determine time. It could be the constant acceleration. The useful equation to be used is:


a = (vf - v₀)/t

So, assuming that the object was dropped from a certain height, the acceleration is due to gravity which is equal to 9.81 m/s². Then,  

9.81 = (10 - 0)/t
t = 1.02  seconds

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What current flows through a 2.62 cm diameter rod of pure silicon that is 23.5 cm long, when 1000 v is applied to it? (such a ro
arlik [135]
Resistivity = resistance * Area / Length
resistance = ??
rho = 2.30 * 10^3 ohms meters.
l = 23.5 cm = 0.235 meters.
diameter = 2.62 cm = 0.0262 m
Radius = diameter / 2 = 0.0131 m
Area = pi r^2 where pi = 3.14
Area = 3.14 * 0.0131^2 = 0.000539 m^2

2.30 * 10^3 = R * 0.000539 /0.235
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R = 1002783 which is about 1 meg ohm, but I'll use the calculation here.

E = 1000 V
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E = I * R
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3 years ago
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4 years ago
An elevator cab has a mass of 4710 kg and can carry a maximum load of 1910 kg. If the cab is moving upward at full load at 3.80
OLEGan [10]

Answer:

Power P=246.78 KW

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Mass of Elevator=4710 Kg

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P= 246780.36 W

P=246.78 KW

4 0
3 years ago
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