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4 years ago

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A meter stick is held vertically with one end on the floor and is then allowed to fall. Find the speed of the other end when it

hits the floor, assuming that the end on the floor does not slip. (Hint: Use conservation of energy.)

1 answer:

Ilia_Sergeevich [38]4 years ago

5 0

Below is the attachment of the solutions.

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A superconducting solenoid has 3300 turns per meter and carries 4. 1 ka. Find the magnetic field strength in the solenoid.

WARRIOR [948]

The magnetic field strength is 17 Weber.

<h3>How can we find the value of magnetic field?</h3>

We know, The magnetic field equation is given by:

$B= \mu_{0} \times n \times I$

<h3>Given,</h3>

Where, we know,

$\mu_{0}$ = $4\pi \times 10^{7}$ $\frac{T. m^{2} }{A}$ = It is the magnetic constant or the permeability of free space.

n = The turn density which is equivalent to number of turns per unit length = 3300 turns per meter = 3300 $m^{-1}$

I= the amount of current applied to it = 4. 1 kA = 4 × $10^{3}$ A.

We have to find the magnetic field strength = B

Substituting the known values into the equation gives the strength of the magnetic field, which is:

$B= 4\pi \times 10^{7} \times (3300) \times 4.1 \times 10^{3}$

$B= 17 T.m$

$B= 17W$ [We know, $1 Tesla.meter = 1 Weber$ ]

So, from the above calculation we can see that, The magnetic field strength is 17 Weber.

Learn more about magnetic field :

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4 0

2 years ago

What happens when two forces at same direction

White raven [17]

Answer:

Explanation:

· If two forces are in the same direction, then one adds them to find the net force, which is the vector sum of these forces. However, when two forces act in opposite direction, one has to subtract the lesser force from the larger one to find the resulting force. The resultant is the direction of the larger of these two forces.

3 0

3 years ago

Please help! 30Points!! An ultrasound machine uses waves to create images. The machine uses sound waves and which wave interacti

Gnesinka [82]

The correct answer should be C

5 0

3 years ago

Read 2 more answers

A skateboarder travels on a horizontal surface with an initial velocity of 4.0 m/s toward the south and a constant acceleration

Alenkinab [10]

Answer:

a) 0.32 m b) -2.4 m c) 1.08 m/s d) -4 m/s

Explanation:

a)

As the x and y axes (as chosen) are perpendicular each other, the movements along these axes are independent each other.
This means that we can use the kinematic equations for displacements along both axes.
In the x direction, as the only initial velocity is in the south direction (-y axis), the skateboarder is at rest, so we can write:

$x =\frac{1}{2}*a*t^{2} (1)$

In the y-direction, as no acceleration is acting on the skateboarder, we can write the following displacement equation:

$y = v_{0y} * t (2)$

For t = 0.6s, replacing by the givens, we get the position (displacement from the origin) on the x-axis, as follows:

$x =\frac{1}{2}*a*t^{2} =\frac{1}{2} * 1.8 m/s2*(0.6s)^{2}\\ x = 0.32 m$

b)

From (2) we can get the position on the y-axis (displacement from the origin) as follows:

$y = v_{0y} * t = -4 m/s * 0.6 s = -2.4 m$

c)

In the x- direction, we can find the component of the velocity along this direction, as follows:

$v_{fx} = a*t$

Replacing by the values, we have:

$v_{fx} = a*t = 1.8 m/s2 * 0.6 s = 1.08 m/s$

d)

As the skateboarder moves along the y-axis at a constant speed equal to her initial velocity, we have:

vfy = voy = -4 m/s

8 0

4 years ago

The muzzle velocity of a bullet fired from a new rifle is 100 m/s. Neglecting air resistance, at the end of one second a bullet

Burka [1]

Answer:

C. (100+4.9)m

Explanation:

u = 100m/s, t = 1 sec, g = 9.8m/s^2

s = ut + 1/2gt^2

s = 100×1 + 1/2×9.8×1^2 = 100+4.9

s = (100+4.9)m

8 0

3 years ago