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3 years ago

How dose an atom become an ion with a -2 charge?

Physics

1 answer:

Aloiza [94]3 years ago

6 0

A atom can become an ion with a -2 charge, if it gains 2 electrons during a chemical reaction.

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Help I’ll cash app you $5 if you get it right!

Thepotemich [5.8K]

Answer: B and E

Explanation:

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3 years ago

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Which of the following is not an element of installment credit?

Alex787 [66]

Answer:

c line of credit I believe

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2 years ago

A child uses a rubber band to launch a bottle cap at an angle of 37.0° above the horizontal. The cap travels a horizontal distan

zavuch27 [327]

Answer:

Initial velocity will be 1.356 m/sec

Explanation:

Let the initial speed = u

Angle at which rubber band is launched = 37°

Horizontal component of initial velocity $u_x=ucos\Theta =ucos37^{\circ}=0.7986u$

Time is given as t = 1.20 sec

Distance in horizontal direction = 1.30 m

We know that distance = speed × time

So time $t=\frac{distance}{speed}$

$1.20=\frac{1.3}{0.7986u}$

$u=1.356m/sec$

So initial velocity will be 1.356 m/sec

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2 years ago

The 1.5-kg collar C starts from rest at A and slides with negligible friction on the fixed rod in the vertical plane. Determine

arlik [135]

Answer:

Explanation:

check attached image for figure, there is supposed to be a figure for this question containing a distance(height of collar at position A) but i will assume 0.2m or 200mm

Consider the energy equilibrium of the system

$U_{A-B}=\bigtriangleup T\\\\F\cos 30°\times h_A - F\sin30°\times h_A + Wh_A=\frac{1}{2}m(v^2_B-v^2_A)\\\\v_B=\sqrt{\frac{2Fh_A(\cos 30° - \sin30°)+mgh_A}{m+v^2_A}}$

Here, F is the force acting on the collar, $h_A$ is the height of the collar at position A, m is the mass of the collar C, g is the acceleration due to gravity, $v_B$ is the velocity of the collar at position B, and $v_A$ is the velocity of the collar at A

Substitute 14.4N for F, 0.2m for $h_A$ , 1.5kg for m, $9.81m/s^2$ for g and 0 for $v_A$

$v_B=\sqrt{\frac{2(14.4\times 0.2(\cos 30° - \sin30°)+1.5\times 9.81\times 0.2}{1.5+0}}\\\\=\sqrt{\frac{6.618}{1.5}}\\\\=4.412m/s$

Therefore, the velocity at which the collar strikes the end B is 4.412m/s

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2 years ago

CRITICAL THINKING HELP !!!!!<br><br> Why are Mind Maps better then TM notes ?

Anna35 [415]

<span>Mind mapping has many benefits over linear text notes.The visual aspect of mind maps allows you to use mindmapping for a wide variety of things.Practical examples of when you should use mind maps over text notes.</span>

All the mind maps created are done by Mindjet MindManager – our favorite mindmapping software. Also, all the ideas outlined here will give you an introductory idea on how to utilize mind maps for certain scenarios. I highly encourage you to explore on your own on how to implement mind maps as the technique is easily malleable for different purposes. So let’s start with the first example.

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2 years ago