Supervisors are subject to disciplinary action for engaging in retaliation.<br> True<br> False

The internal energy of a system changes because the system gains 160 J of heat and performs 309 J of work. In returning to its i

o-na [289]

Answer:

w=255

Explanation:

The change in internal energy is given by the first law:

ΔE = Q - w

where ΔE is the change in internal energy of the system

q is the heat added to the system

w is the work done *by* the system on the surroundings

So, for the first phase of this process:

ΔE = Q - w

Q=160J

w=309J

ΔE = 160J - 309J = -149J

To bring the system back to its initial state after this, the internal energy must change by +149J (the system myst gain back the 149 J of energy it lost). We are told that the system loses 106 J of heat in returning to its initial state, so the work involved is given by:

ΔE = Q - w

+149J = -106J - w

255J = -w

w = -255J

5 0

3 years ago

The ends of a magnet where thee forces are the strongest are called magnets

ladessa [460]

They are called magnets poles.

7 0

3 years ago

KI + Cl2 ---> KCl + I2<br> Balance the single replacement chemical reaction.

snow_lady [41]

Answer:

2KI + Cl₂ → 2KCl + I₂

Explanation:

The reaction equation is given as:

KI + Cl₂ → KCl + I₂

The problem at hand is to balance this chemical reaction. To solve this problem we use a mathematical approach;

aKI + bCl₂ → cKCl + dI₂

Conserving K : a = c

I : a = 2d

Cl : 2b = c

Now let a = 1, c = 1 , d = $\frac{1}{2}$ , b = $\frac{1}{2}$ , ;

Multiply through by 2;

a = 2, b = 1 , c = 2, d = 1

2KI + Cl₂ → 2KCl + I₂

5 0

3 years ago

In wet climates, granite weathers more slowly than ____

RideAnS [48]

Marble. This is because granite is of a different chemistry that is not nearly as vulnerable to acidic rain as marble.

6 0

3 years ago

Using a simple pendulum, we can measure. (a) Acceleration along a circle (b) Acceleration due to gravity (c) Frequency (d) None

zalisa [80]

Answer:

Option B is the correct answer.

Explanation:

Period of simple pendulum is given by the expression $T=2\pi \sqrt{\frac{l}{g}}$ , where l is the length of pendulum and g is the acceleration due to gravity value.

So if we have a simple pendulum with length l we can find its period. Using the above formula we can calculate acceleration due to gravity value of that place.

So using simple pendulum we can measure acceleration due to gravity value.

Option B is the correct answer.

3 0

3 years ago

Supervisors are subject to disciplinary action for engaging in retaliation. True False