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Lena [83]
3 years ago
10

30N of force is used to raise a box that weight 60N up an incline plane. What is the mechanical advantage of the incline plane?

Physics
1 answer:
Sati [7]3 years ago
3 0
To calculate MA = force needed/force used
Example
MA = 60/30 = 2
The mechanical advantage is 2
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A solenoid 10.0 cm in diameter and 63.3 cm long is made from copper wire of diameter 0.100 cm, with very thin insulation. The wi
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Answer:

19559303watts

Explanation:

The field inside a solenoid is

B =µ0*N*I/h

where N is the number of turns, I the current in each turn, and h the length.

If the wire's diameter is d, then the number of turns is N = h/d so the equation becomes

B = µ0*I/d

I = B*d/µ0

B = 7.8*10^-3 T, d = 0.001 m, µ0 = 4*π*10^-7 H/m

I = 8*10^-3*0.001/(4*π*10^-17))

I = 6.366A

For power

We need to know ρ, the resistivity of the wire. The resistance of the coil R = ρ*L/A where L is the total wire length and A the area.

L = N*π*D, were D = diameter of the solenoid and N the no of turns. As above, N = h/d so L = h*π*D/d. The wire area is π*d²/4 so the resistance is

R = ρ*h*π*D/d*(π*d²/4) = 4*ρ*h*D/d³

The power is I²*R = (B*d/µ0)²*4*ρ*h*D/d³ = (B/µ0)²*4*ρ*h*D/d

For copper ρ = 16.8*10^-9 Ω-m and

D = 0.10 m, h = 0.722 m

P = (6.366 / 4 * π * 10^-7)^2 * 4 * 16.8 * 10 ^-9 * 0.722 * 0.1/0.001

P = 19559303watts

P = 20MW

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4 years ago
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List the chemicals and apparatus
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Beaker

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In a polytropic process, with the exponent n = k, where k is the specific heat ratio, 1.0 kg of neon (an ideal gas) in a frictio
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A boiling pot of water (the water travels in a current throughout the pot), a hot air balloon (hot air rises, making the balloon rise) , and cup of a steaming, hot liquid (hot air rises, creating steam) are all situations where convection occurs. 
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3 0
3 years ago
What is dispersion of light?​
algol13

Answer:

\huge \bold \blue{ \underline{ answer}}

The splitting up of light into its constituent colours while passing from one medium to the other is called dispersion.

3 0
2 years ago
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The position-time equation for a certain train is
astraxan [27]

Answer:

a=4.8m/s^2

Explanation:

Hello,

In this case, since the acceleration in terms of position is defined as its second derivative:

a=\frac{d^2x(t)}{dt^2}=\frac{d^2}{dt^2}(2.9+8.8t+2.4t^2)

The purpose here is derive x(t) twice as follows:

a=\frac{d^2x(t)}{dt^2}=\frac{d}{dt}(8.8+2*2.4*t)\\ \\a=4.8m/s^2

Thus, the acceleration turns out 4.8 meters per squared seconds.

Best regards.

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