When an electron is removed from an atom, it becomes _____

A compound consisting of only phosphorous and oxygen atoms is 43.64 % phosphorus by mass.The molecular mass/formula weight of th

DanielleElmas [232]

First, we calculate the mass of Phosphorous present:
283.88 x 0.4364
= 123.88 amu
Atomic mass of P is 31 amu

moles of P = mass / Ar
= 123.88 / 31
= 4.0 moles

We know that one mole of substance has 6.02 x 10²³ particles
Atoms of P = 4 x 6.02 x 10²³
= 2.41 x 10²⁴ atoms

6 0

3 years ago

A golf ball is given an initial velocity of 100 m/s at an angle of 22o with the horizontal. The golf ball lands on the roof of a

hoa [83]

a) 92.7 m/s, 37.5 m/s

The initial horizontal and vertical velocity are given by the equations:

$u_x = u cos \theta\\u_y = u sin \theta$

where

u = 100 m/s is the initial velocity of the ball

$\theta=22^{\circ}$ is the angle of projection

So, the horizontal component of the initial velocity is

$u_x = (100)(cos 22)=92.7 m/s$

While the vertical component is

$u_y = (100)(sin 22)=37.5 m/s$

b) 3.83 s

The time at which the ball reaches the maximum height can be found by analyzing the vertical motion only.

In fact, the vertical velocity of the ball is given by

$v_y = u_y +at$

where

$u_y = 37.5 m/s$

$a=g=-9.8 m/s^2$ is the acceleration of gravity (in the downward direction)

t is the time

The ball reaches the maximum height when the vertical velocity becomes zero:

$v_y = 0$

So, solving for t, we find the time at which this happens:

$t=-\frac{u_y}{g}=-\frac{37.5}{9.8}=3.83 s$

c) 92.7 m/s

As stated in part b), the vertical velocity of the ball at the maximum height is zero:

$v_y = 0$

Along the horizontal direction, insteand, the motion of the ball is uniform, since there are no forces acting in this direction. Therefore, the horizontal velocity of the ball is constant (because the horizontal acceleration is zero), and it is

$v_x = u_x = 92.7 m/s$

And therefore, the velocity of the ball at the maximum height is simply equal to the horizontal velocity:

$v=92.7 m/s$

d) 71.7 m

The maximum height of the ball can be found by studying again the vertical motion only, by using the following suvat equation:

$s=u_yt+\frac{1}{2}at^2$

where

s is the vertical displacement at time t

$u_y = 37.5 m/s$

$a=g=-9.8 m/s^2$

We know that the ball reaches the maximum height when t = 3.83 s, so we can find the vertical displacement at that time:

$s=(37.5)(3.83)+\frac{1}{2}(-9.8)(3.83)^2=71.7 m$

So, the maximum heigth is 71.7 m.

e) 5.93 s

We know that the ball lands on a building whose height is

h = 50 m

This means that when the ball lands, its vertical displacement is

s = 50 m

So, we can use again the equation

$s=u_yt+\frac{1}{2}at^2$

To find t, the time at which the ball lands. Substituting:

$u_y = 37.5 m/s$

$a=g=-9.8 m/s^2$

s = 50 m

The equation becomes

$50=37.5 t -4.9 t^2\\4.9t^2 -37.5 t +50 = 0$

which gives two solutions:

t = 1.72 s

t = 5.93 s

The first solution is the moment at which the ball reaches the height of h = 50 m for the first time (before reaching its maximum height), so we ignore it, and therefore the ball lands after

t = 5.93 s

8 0

3 years ago

Home heating systems usually work in the following way: When the furnace warms a house above the set temperature of the thermost

Paraphin [41]

Home heating systems work through negative feedback by regulating the temperature through thermostat.

<h3>How home heating systems work through negative feedback?</h3>

In thermostat, when the temperature of the room environment increases by the negative feedback system the furnace gets turn off, allowing the room to get to its normal temperature and when the temperature lower down it turns on again and maintain the temperature in equilibrium state.

So we can conclude that home heating systems work through negative feedback by regulating the temperature through thermostat.

Learn more about temperature here: brainly.com/question/24746268

#SPJ9

7 0

2 years ago

What feature of double-glazed windows makes them good insulators? a. Thick glass is highly viscous. c. Heat conduction cannot ta

Andrei [34K]

None of the above.
The air gap between the panes adds some thermal insulation.
About 1/2" is best. Less than that you get conduction. More than that you get more convection between panes. Double glazed windows do not usually have a vacuum in them -- there could be argon tho...

3 0

3 years ago

Read 2 more answers

How would you convert steps and jumps to meters?

kumpel [21]

Explanation:

by inches to centimeter u can convert to meters

6 0

3 years ago

When an electron is removed from an atom, it becomes ______ ion.