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3 years ago

Why are negative ions usually larger than positive ions

Physics

2 answers:

Fantom [35]3 years ago

7 0

They have gained an electron

irga5000 [103]3 years ago

4 0

A negative ion is a atom that has an extra electron, but the same # of protons

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A skateboarder with a mass of 60 kg moves with a force of 20 N. What is her acceleration?

Zanzabum

Explanation:

Solution,

Mass(m)= 60 kg
Force (F)= 20 N
Acceleration (a)= ?

We know that,

F=ma
a=F/m
a=20/60
a=0.333 m/s²

So, her acceleration is 0.333 m/s².

4 0

2 years ago

If an electromagnetic wave has components Ey = E0 sin(kx - ωt) and Bz = B0 sin(kx - ωt), in what direction is it traveling?

fomenos

Answer:

Its traveling in the +x direction

Explanation:

The E-field is in the +y-direction, and the B-field is in the +z-direction, so it must be moving along the +x-direction, since the E-field, B-field and the direction of moving are all at right angles to each other.

8 0

3 years ago

if you run around a circle at 4.5 m/s and the circle has a radius of 7.7 m, what is your centripetal acceleration?

madreJ [45]

Answer:

Centripetal acceleration,

$a_{c} =2.63\ m/s^{2} }$

Explanation:

Centripetal acceleration:

Centripetal acceleration is the idea that any object moving in a circle, in something called circular motion, will have an acceleration vector pointed towards the center of that circle.

Centripetal means towards the center.

Examples of centripetal acceleration (acceleration pointing towards the center of rotation) include such situations as cars moving on the cicular part of the road.

An acceleration is a change in velocity.

Formula for Centripetal acceleration:

$a_{c} =\frac{(velocity)^{2} }{radius}$

Given here,

Velocity = 4.5 m/s

radius = 7.7 m

To Find :

$a_{c} = ?$

Solution:

We have,

$a_{c} =\frac{(velocity)^{2} }{radius}$

Substituting given value in it we get

$a_{c} =\frac{(4.5)^{2}}{7.7} \\\\a_{c} =\frac{20.25}{7.7}\\\\a_{c} =2.629\ m/s^{2} \\\\\therefore a_{c} =2.63\ m/s^{2$

Centripetal acceleration,

$a_{c} =2.63\ m/s^{2} }$

7 0

3 years ago

How does the number of valence electrons affect the reactivity?

ololo11 [35]

The less valence electrons the more reactive the element is.

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3 years ago

To help you rank the reactivity of the three metals you will be creating atomic charge models for each of the elements. You may

gtnhenbr [62]

Metals tend to readily lose electrons and form cations. Most of them react with atmospheric oxygen to form metal oxides. However, different metals have different reactivities towards oxygen (unreactive metals such as gold and platinum do not readily form oxides when exposed to air

4 0

2 years ago

Read 2 more answers