Ask question

Ask question

All categories

2 years ago

13

Someone pls help me I will make you brain

1 answer:

Andreyy892 years ago

6 0

c- i and iii

I hope this helps

You might be interested in

3. Which of the following is not true for atoms? (4 points) They combine to form elements and molecules. They contain negatively

Taya2010 [7]

<h3><u>Answer;</u></h3>

They are made up of elements.

<h3><u>Explanation;</u></h3>

An atom is the smallest particle of matter that still retains the property of the element.
Two or more atoms combine to form elements or compounds. Elements are formed by two or more similar atoms, while compounds are formed by two or more different elements.
Atoms are made up of subatomic particles; protons, electrons and neutrons. Electrons are negatively charged, protons are positively charged while neutrons have no charge.

7 0

2 years ago

Which man made element is in an anomalous location

krok68 [10]

the man made element that is in an anomalous location is Transuranium.

6 0

2 years ago

Read 2 more answers

A tank contains 90 kg of salt and 2000 L of water. Pure water enters a tank at the rate 6 L/min. The solution is mixed and drain

sashaice [31]

Answer:

a) 90 kg

b) 68.4 kg

c) 0 kg/L

Explanation:

Mass balance:

$-w=\frac{dm}{dt}$

w is the mass flow

m is the mass of salt

$-v*C=\frac{dm}{dt}$

v is the volume flow

C is the concentration

$C=\frac{m}{V+(6-3)*L/min*t}$

$-v*\frac{m}{V+(6-3)*L/min*t}=\frac{dm}{dt}$

$-3*L/min*\frac{m}{2000L+(3)*L/min*t}=\frac{dm}{dt}$

$-3*L/min*\frac{dt}{2000L+(3)*L/min*t}=\frac{dm}{m}$

$-3*L/min*\int_{0}^{t}\frac{dt}{2000L+(3)*L/min*t}=\int_{90kg}^{m}\frac{dm}{m}$

$-[ln(2000L+3*L/min*t)-ln(2000L)]=ln(m)-ln(90kg)$

$-ln[(2000L+3*L/min*t)/2000L]=ln(m/90kg)$

$m=90kg*[2000L/(2000L+3*L/min*t)]$

a) Initially: t=0

$m=90kg*[2000L/(2000L+3*L/min*0)]=90kg$

b) t=210 min (3.5 hr)

$m=90kg*[2000L/(2000L+3*L/min*210min)]=68.4kg$

c) If time trends to infinity the division trends to 0 and, therefore, m trends to 0. So, the concentration at infinit time is 0 kg/L.

6 0

3 years ago

Helpppp nowwww plsss!!

pogonyaev

Answer:

A

Explanation:

if the earth slows down then that will give more time to the sun meaning days/nights will be longer

5 0

2 years ago

Why weren’t scientists initially concerned that the ocean absorbs excess carbon dioxide?

nasty-shy [4]

They only discovered

5 0

2 years ago