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
algol13
3 years ago
15

How many watts of power (W) do you expend when you exert a force of 10 N that moves a

Chemistry
1 answer:
mihalych1998 [28]3 years ago
7 0

Answer:

Power = 7.5 watt

Explanation:

Given data:

Power expend = ?

Force applied = 10 N

Distance cover = 1.5 m

Time = 2 s

Solution:

Power = work/ time

First of all we will calculate work.

Work = Force × distance

Work = 10 N × 1.5 m

Work = 15 N.m

Now we will calculate the power.

Power = 15 N.m / 2s

N.m/s = 1 watt

Power = 7.5 watt

You might be interested in
Predict the sign of the entropy change, ΔS∘, for each of the reaction displayed.Drag the appropriate items to their respective b
Sonja [21]

Answer:

Ag+(aq)+Br−(aq)→AgBr(s)                                NEGATIVE

CaCO3(s)→CaO(s)+CO2(g)2                           POSITIVE

NH3(g)→N2(g)+3H2(g)                                    POSITIVE

2Na(s)+Cl2(g)→2NaCl(s)                                 NEGATIVE

C3H8(g)+5O2(g)→3CO2(g) +4H2O(g)           POSITIVE

I2(s)→I2(g)                                                        POSITIVE

Explanation:

We have to remember, to solve this problem, that the entropy of a gas is higher than that of a liquid which in turn  is higher than the solid. Therefore, comparing the reactants and products look for changes in the state of reactants and products. We also have to look for the increase or decrease of moles of each state based on the balanced chemical reaction.

Ag+(aq)+Br−(aq)→AgBr(s)

The reaction product is a single solid and the  the reactants were 2 species in solution. The change in entropy is negative.

CaCO3(s)→CaO(s)+CO2(g)2

Here we have a solid reactant and we have a solid product plus a gas product. The change in entropy is positive.

NH3(g)→N2(g)+3H2(g)

We have 4 mole gases as products starting from 1 mol reactant gas, the entropy has increased.

2Na(s)+Cl2(g)→2NaCl(s)

In this reaction 2 mol solid Na and 1 mol Cl₂ gas are converted into 2 mol solid NaCl, the entropy has decreased.

C3H8(g)+5O2(g)→3CO2(g) +4H2O(g)

The products are 7 mol of gas versus 6 mol of gas reactants and therefore entropy has increased.

I2(s)→I2(g)

1 mol solid I₂ goes into 1 mol gas making the change in  the entropy higher.

4 0
3 years ago
You have a solution that is 0.02M formate (HCOO-) and 0.03M formic acid (HCOOH), which has a Ka of 1.8x10-4. What is the pH of t
lisov135 [29]

Answer:

3.6

Explanation:

Step 1: Given data

  • Concentration of formic acid: 0.03 M
  • Concentration of formate ion: 0.02 M
  • Acid dissociation constant (Ka): 1.8 × 10⁻⁴

Step 2: Calculate the pH

We have a buffer system formed by a weak acid (HCOOH) and its conjugate base (HCOO⁻). We can calculate the pH using the <em>Henderson-Hasselbach equation</em>.

pH = pKa +log\frac{[base]}{[acid]} = -log 1.8 \times 10^{-4} + log \frac{0.02}{0.03} = 3.6

6 0
3 years ago
What is the basic role of CO2 in photosynthesis? What is the basic role of CO2 in photosynthesis? CO2 is taken in by plants as a
ladessa [460]

Answer:

carbon dioxide is fixed or incorporated into organic molecules.

Explanation:

Carbon dioxide fixation is the conversion of inorganic carbon into organic carbon.

In photosynthesis CO2 is converted into glucose i.e inorganic carbon (CO2) is converted into organic molecule (glucose).

4 0
3 years ago
Which of the following contains ionic bonding? (2 points)
kiruha [24]
I think its B but im not sure...

5 0
3 years ago
Read 2 more answers
Give the Shorthand Electron Configuration for the following elements:
Gnoma [55]

answer of this question is [Ar]3d8 4s2

5 0
2 years ago
Other questions:
  • What factors affect the rate of dissolving a solid in a liquid? Explain...
    10·1 answer
  • If I have 5,000g of sodium, how much sodium sulfide can be made?
    8·2 answers
  • QUICK CHEMISTRY QUESTION WORTH 15 POINTS WILL MARK BRAINLIEST!
    13·1 answer
  • Which of these is a mixture?<br> A)potassium<br> B)salad<br> C)water H20<br> Dsugar C12H22O11
    15·1 answer
  • Many reactions involve a change in hybridization of one or more atoms in the starting material. In this reaction, determine the
    10·1 answer
  • Sally has constructed a concentration cell to measure Ksp for MCln. She constructs the cell by adding 2 mL of 0.05 M M(NO3)n to
    13·1 answer
  • The "Ring of Fire" is a set of _________ that often occur along plate boundaries. There are many plate boundaries along Pacific
    14·1 answer
  • How many atoms are in 4.5 x 1022 moles of CO2?
    13·1 answer
  • What refers to the attractive forces that exist between molecules?​
    14·1 answer
  • How many milliliters of an injection containing 250 mg of aminophylline in each 10 ml should be used in filling a medication ord
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!