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4 years ago

HURRY!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

2 answers:

7 0

<span>A) The effort force is always smaller than the force needed without the machine.

It is because some of the work (by force) is lost during the conversion

Hope this helps!</span>

Triss [41]4 years ago

5 0

<span>A) The effort force is always smaller than the force needed without the machine. </span>

You might be interested in

An object located behind the focal point of a convex lens forms a(an)

Tomtit [17]

Enlarged real image.

A converging lens always has a positive focal point so the light rays always converge on the real side of the lens, creating a real image.

It will also be enlarged because when you draw a ray diagram you can see that the image will be about two times or so larger depending on where the position of the object actually is. Usually when an image is reduced, it is when it is a diverging / concave lens.

7 0

4 years ago

Read 2 more answers

A bicyclist starting from rest applies a force of F = 454 N to ride his bicycle across flat ground for a distance of d = 250 m b

frutty [35]

Answer:

1.) 113500J

2.) 237m

Explanation:

Hello!

To solve this exercise follow the following steps, the description and complete process is in the attached image

1. Draw the full sketch of the problem.

2. The work is defined as the product of the trajectory by the force that is parallel to this direction, for this reason to find the work done we multiply the horizontal distance (250m) by the applied force (454N)

3. The potential energy is equal to the product of mass, gravity and height and is equal to the work done by the force applied by the cyclist, of this relationship and using algebra we can find the height that the cyclist climbed

4. We use the sine function to find the diagonal distance using the height and angle of the slope

7 0

3 years ago

At what distance on the axis of a current loop is the magneticfield half the strength of the field at the center of the loop? Gi

olchik [2.2K]

Answer:

x = 1.26 R

Explanation:

For this exercise let's find the magnetic field using the Biot-Savart law

B = μ₀ I/4π ∫ ds x r^ / r²

In the case of a loop or loop, the quantity ds is perpendicular to the distance r, therefore the vector product reduces to the algebraic product and the direction of the field is perpendicular to the current loop

suppose that the spiral eta in the yz plane, therefore the axis is in the x axis

B = μ₀ I/4π ∫ ds / (R² + x²)

The total magnetic field has two components, one parallel to the x axis and another perpendicular, this component is annual when integrating the entire loop, so the total field is

B = Bₓ i^

using trigonometry

Bₓ = B cos θ

we substitute

Bₓ = μ₀ I/4π ∫ ds cos θ / (x² + R²)

the cosine function is

cos θ = R /√(x² + R²)

The differential is

ds = R dθ

we substitute

Bₓ = μ₀ I/4π ∫ (R dθ) R /√( (x² + R²)³ )

we integrate from 0 to 2π

Bₓ =μ₀ I/4π R² / √(x² + R²)³ 2pi

therefore the final expression is

B = μ₀ I R²/ 2√(x² + R²)³ i^

In our case the distance is requested where B is half of B in the center of the bone loop x = 0

Spire center field x=0

B₀ = μ₀ I/2R

Field at the desired point (x)

B = B₀ / 2

we substitute

R² /√(x² + R²)³ = ½ 1 /R

2R³ =√(x² + R²)³

(x² + R²)³ = 4 (R²)³

(x²/R² + 1)³ = 4

The exact result is the solution of this equation, but it is quite laborious, we can find an approximate result assuming that the distance x is much greater than R (x »R)

B = μ₀ I/2x³

we substitute

R² / x³ = 1/2 1 / R

2R³ = x³

x = ∛2 R

x = 1.2599 R

3 0

3 years ago

The density of this material is 2 g/cm3 there are 24 cm3 find the total mass

Fynjy0 [20]

Answer:

<h2>The answer is 48 g</h2>

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

mass = Density × volume

From the question we have

mass = 2 × 24

We have the final answer as

Hope this helps you

7 0

3 years ago

Please help me with these I might need more than only 1 person to answer

Sindrei [870]

Explanation:

a) copper

b) olive oil

Hope it helps✌✌

7 0

3 years ago