1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
allsm [11]
3 years ago
9

Given the law of conservation of energy, what happens when a 200°C iron bar is placed in thermal contact with a 30°C block of wo

od?
O A
Energy leaves the iron bar and enters the wood until the temperatures are equal,
OB
Energy leaves the wood and enters the iron bar until the temperatures are equal.
O
C.
All the energy from the iron bar is transferred to the wood.
O
D.
All the energy from the wood is transferred to the iron bar.
Chemistry
1 answer:
kozerog [31]3 years ago
7 0

Answer:

The correct answer is A Energy leaves the iron bar and enters the wood until the temperature are equal.

Explanation:

According to the law of conservation of energy or the first law thermodynamics energy neither be created nor destroyed, energy is transferred from one form to another form.

        Here iron bar is placed in wood block energy is transferred from iron bar to wood until the temperatures are equal.

You might be interested in
Weeks and how much money, in dollars, Jamal deposits into the savings account.
pantera1 [17]

An

196 becase we all rice

Explanation:

8 0
3 years ago
Calculate OH- given H3 O+ = 1.40 *10^-4 M
vova2212 [387]

3.16 X 10^-11 M is the [OH-] concentration when H3O+ = 1.40 *10^-4 M.

Explanation:

data given:

H30+= 1.40 X 10^-4 M\

Henderson Hasslebalch equation to calculate pH=

pH = -log10(H30+)

putting the values in the equation:

pH = -log 10(1.40 X 10^-4 M)

pH = 3.85

pH + pOH =14

pOH = 14 - 3.85

pOH = 10.15

The OH- concentration from the pOH by the equation:

pOH = -log10[OH-]

10.5= -log10[OH-]

[OH-] = 10^-10.5

[OH-]  = 3.16 X 10^-11 is the concentration of OH ions when hydronium ion concentration is 1.40 *10^-4 M.

8 0
3 years ago
Please please help
il63 [147K]

Explanation:

question 44

the number 35 of bromine represents the atomic number

question 45

29 protons,

27 electrons

29-27 = +2

the charge on the following particle is

+2

4 0
3 years ago
Help please please please please
Rom4ik [11]

Answer:

D. 18.7 grams

Explanation:

The coefficients are the key.

Create a proportion with them, and the molar mass, and then solve for x:

\frac{2}{3}  =  \frac{x}{28}  \\ 3x = 2(28) \\ 3x = 56 \\ x = 18.666... = 18.7

7 0
3 years ago
The Earth is always _______ as it revolves around the sun.
EastWind [94]

Answer

Rotating

Explanation:

The Earth is always being pulled towards the Sun by gravity.

The Earth is not moving fast enough to "escape" the Sun's gravity and leave the solar system, but it is going too fast to be pulled into the Sun. Therefore, it keeps going around and around( roating)- orbiting the Sun.

5 0
3 years ago
Read 2 more answers
Other questions:
  • You have the same two resistors on a 10 volt series circuit. Will the voltage going into the second resistor be more, less, or t
    14·1 answer
  • If heat is added to a boiling liquid, what happens to the temperature of the liquid?
    11·1 answer
  • Give the formula for the compound formed when sulfur trioxide reacts with water.
    6·1 answer
  • What is the molar concentration of Na⁺(aq) in a solution that is prepared by mixing 10 mL of a 0.010 M NaHCO₃(aq) solution with
    6·1 answer
  • How many grams of calcium chloride will be produced when 28.0 g 28.0 g of calcium carbonate is combined with 14.0 g 14.0 g of hy
    14·2 answers
  • How much space does 2 x 1022 atoms of copper take up?
    7·1 answer
  • For the reaction PCl5(g) + heat PCl3(g) + Cl2(g), what will happen when the volume is increased?
    14·1 answer
  • How can you use the periodic table to find the number of protons in one atom of an element?
    9·1 answer
  • Help please it’s worth 20 points
    8·2 answers
  • How many O atoms are in 1.50 mol of sodium carbonate.
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!