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3 years ago

How is the ideal mechanical advantage of a wheel and axle calculated?

2 answers:

8 0

Mechanical Advantage is the value which tells us the factor by which the machine is able to convert the force applied to it to its output.

Ideal Mechanical Advantage of wheel and axle is calculated by

IMA = Wheel Radius / Axle Radius

By virtue, the higher the computed IMA the lower the force needed to be exerted, this is the purpose for using machine, lower input force but larger output. (The smalled the axle radius compared to the wheel radius is the better setup.)

maria [59]3 years ago

7 0

Divide the radius of the wheel by the radius of the axle

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A point charge is placed at the center of a spherical Gaussian surface. The electricflux ΦEischangedif(a) a second point charge

Simora [160]

Answer:

(b) the point charge is moved outside the sphere

Explanation:

Gauss' Law states that the electric flux of a closed surface is equal to the enclosed charge divided by permittivity of the medium.

$\int\vec{E}d\vec{a} = \frac{Q_{enc}}{\epsilon_0}$

According to this law, any charge outside the surface has no effect at all. Therefore (a) is not correct.

If the point charge is moved off the center, the points on the surface close to the charge will have higher flux and the points further away from the charge will have lesser flux. But as a result, the total flux will not change, because the enclosed charge is the same.

Therefore, (c) and (d) is not correct, because the enclosed charge is unchanged.

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3 years ago

calculate the energy dissipated by an electric iron which draws a current of 5A from a240v power supply for 25minutes

Sav [38]

Explanation:

Given,

I = 5 A

V = 240 V

T = 25 mins = 1500 sec

Now,

Energy dissipated = IVT= 5×240×1500 = 1800000 J

4 0

3 years ago

When recyclable materials are sent to a recycling plant, they are often not sorted in any particular way. Plastic materials migh

4vir4ik [10]

Answer:

by applying a magnetic force to recycled materials

8 0

3 years ago

Read 2 more answers

How could you determine if a chemical is an element or a compound?

Veronika [31]

Answer:

An element is a pure substance and is found on the periodic table. If you have more than one element chemically bonded, it is a compound. ... H2O is a compound

Explanation:

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3 years ago

I notice the wheels on my bicycle spin in a circular motion as I am pedaling. I know that the

kherson [118]

Answer:

Acceleration, a = 750m/s²

Explanation:

Given the following data;

Radius, r = 0.31m

Velocity, v = 15m/s

To find the centripetal acceleration;

$Acceleration, a = \frac {v^{2}}{r}$

Substituting into the equation, we have;

$Acceleration, a = \frac {15^{2}}{0.31}$

$Acceleration, a = \frac {225}{0.31}$

Acceleration, a = 750m/s²

Therefore, the centripetal acceleration of the bike wheel is 750m/s².

6 0

3 years ago