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3 years ago

WILL UPVOTE EVERY ANSWER! MULTIPLE CHOICE QUESTION!

1 answer:

3 0

Objects with Relative density greater than 1 will sink in water. As you can see here, solution has density greater than 1( density = mass/volume = 43/35 = 1.22 g/ml). Hence solution will suspend at the bottom of the beaker. So option A is correct. Hope this cleared your doubt!

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Convert 16.1 km/h to meters per second

fiasKO [112]

16.1=4.472222 i hope this helps!!

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3 years ago

A plank of length L=2.200 m and mass M=4.00 kg is suspended horizontally by a thin cable at one end and to a pivot on a wall at

baherus [9]

Hello!

Let's begin by doing a summation of torques, placing the pivot point at the attachment point of the rod to the wall.

$\Sigma \tau = 0$

We have two torques acting on the rod:
- Force of gravity at the center of mass (d = 0.700 m)

- VERTICAL component of the tension at a distance of 'L' (L = 2.200 m)

Both of these act in opposite directions. Let's use the equation for torque:
$\tau = r \times F$

Doing the summation using their respective lever arms:

$0 = L Tsin\theta - dF_g$

$dF_g = LTsin\theta$

Our unknown is 'theta' - the angle the string forms with the rod. Let's use right triangle trig to solve:

$tan\theta = \frac{H}{L}\\\\tan^{-1}(\frac{H}{L}) = \theta\\\\tan^{-1}(\frac{1.70}{2.200}) = 37.69^o$

Now, let's solve for 'T'.

$T = \frac{dMg}{Lsin\theta}$

Plugging in the values:
$T = \frac{(0.700)(4.00)(9.8)}{(2.200)sin(37.69)} = \boxed{20.399 N}$

3 0

1 year ago

The average weather of a particular place is

aniked [119]

<span>The average weather of a particular place is "Climate"

In short, Your Answer would be Option B

Hope this helps!</span>

3 0

3 years ago

Read 2 more answers

When all else remains the same, what effect would decreasing the focal length have on a convex lens?

aniked [119]

<h3>Answer;</h3>

<u>It would make the lens stronger. </u>

<h3>Explanation;</h3>

The focal length is the distance between the optical center or the center of the lens to the focal point of a convex or concave lens.
The power of the convex lens is lens ability to undertake refraction or bend light. It is given as the reciprocal of focal length.
Power of the lens = 1/ f; therefore the smaller the focal length the higher the power and the larger the focal length the lower the power.
Thus; decreasing the focal length of a convex lens makes the lens stronger.

4 0

3 years ago

Read 2 more answers

Adaptive organ of duck

postnew [5]

Answer:

brain

Explanation:

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2 years ago