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2 years ago

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When we say charge is conserved, we mainly mean that charge can be _________. View Available Hint(s)for Part A constant in all b

odies transferred without loss like money in a bank created and destroyed in equal amounts saved, like money in a bank

1 answer:

Rasek [7]2 years ago

3 0

Answer:

neither created nor destroyed.

Explanation:

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Glycerin (C3H8O3) is a nonvolatile liquid. What is the vapor pressure of a solution made by adding 154 g of glycerin to 316 mL o

garri49 [273]

Answer:

$P_{sol}=50.4\ mm.Hg$

Explanation:

According to given:

molecular mass of glycerin, $M_g=3\times 12+8+3\times 16=92\ g.mol^{-1}$

molecular mass of water, $M_w=2+16=18\ g.mol^{-1}$

∵Density of water is $0.992\ g.cm^{-3}= 0.992\ g.mL^{-1}$

∴mass of water in 316 mL, $m_w=316\times 0.992=313.5 g$

mass of glycerin, $m_g=154\ g$

pressure of mixture, $P_x=55.32\ torr= 55.32\ mm.Hg$

temperature of mixture, $T_x=40^{\circ}C$

<em>Upon the formation of solution the vapour pressure will be reduced since we have one component of solution as non-volatile.</em>

<u>moles of water in the given quantity:</u>

$n_w=\frac{m_w}{M_w}$

$n_w=\frac{313.5}{18}$

$n_w=17.42 moles$

<u>moles of glycerin in the given quantity:</u>

$n_g=\frac{m_g}{M_g}$

$n_g=\frac{154}{92}$

$n_g=1.674 moles$

<u>Now the mole fraction of water:</u>

$X_w=\frac{n_w}{n_w+n_g}$

$X_w=\frac{17.42}{17.42+1.674}$

$X_w=0.912$

<em>Since glycerin is non-volatile in nature so the vapor pressure of the resulting solution will be due to water only.</em>

$\therefore P_{sol}=X_w\times P_x$

$\therefore P_{sol}=0.912\times 55.32$

$P_{sol}=50.4\ mm.Hg$

7 0

3 years ago

When an object slides across the floor, it is slowed down by friction and the floor surface gets warmer. what energy conversion

OverLord2011 [107]

The movement of the object is considered to be kinetic energy while the object getting warmer indicates that there is thermal (heat) energy formed.

Based on this, as the object slides across the floor, friction slows down this motion and the object becomes warmer as kinetic energy is converted into thermal energy.

6 0

3 years ago

Which energy output objects work with the turbine

viktelen [127]

Answer:

The energy output object that works with the turbine is the alternator (generator)

Explanation:

In energy generation the turbine receives input energy from high pressured steam, high energy water etc. Which impinges and turn the blades of the turbine, this turbine is connected by means of a shaft to the alternator that converts the rotational motion of the shaft to electrical energy through Electro magnetic induction principles and also outputs the energy for consumption.

6 0

3 years ago

Which of the following is an example of an

olga55 [171]

Answer:

c. mandible

Explanation:

7 0

3 years ago

Hooke’s Law Worksheet #1

dimaraw [331]

1. F = 0.25N

2. k = 80 N/m

3. x = 0.2m

4. a = 1m/s²

5. x = 42.6m

<u>Explanation:</u>

1. F = kx

F = 2.5 X 0.1

F = 0.25N

2. x = 0.25m

F = 20 N

F = kx

20 = k X 0.25

k = 80 N/m

3. k = 3500 N/m

F = 700 N

x = ?

700 = 3500 x

x = 0.2m

4. m = 20kg

k = 244 N/m

x = 0.1m

F = 20N

a = ?

F = ma

20 = 20 a

a = 1m/s²

5. k = 2.3 N/m

m = 10kg

x = ?

F = kx

10 X 9.8 = 2.3 x

x = 42.6m

5 0

3 years ago