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
stellarik [79]
3 years ago
14

PLZ HELPPPP

Chemistry
2 answers:
Dmitrij [34]3 years ago
8 0

Answer:

Explanation:

It has to be less than 100% efficient. There is always some cost in changing one form of energy to another especially if work is involved.

AlladinOne [14]3 years ago
6 0

Answer:

every real machine must be less than 100 because of the force that overcome friction

You might be interested in
In an electrolytic cell, the electrode that acts as a source of electrons to the solution is called the __________; the chemical
Artyom0805 [142]

Answer:

D. cathode; reduction

Explanation:

<em>Hope this helps~</em>

<em />

7 0
3 years ago
What is the pOH of a solution that has a hydronium ion concentration [H3O+] of 8.26 x 10–5 M?
kirill115 [55]

Answer:

9.92

Explanation:

Since we are given the concetration of H+ we can find the ph by taking the negative log and then subtracting the ph from 14 to give us pOH

-log(8.26e-5) = pH= 4.08

pOH= 14-4.08

pOH= 9.92

8 0
3 years ago
How old is a fossil that has radioactively decayed through 4 half-lives of carbon-14?
gavmur [86]

Answer:

Carbon-14 has a half life of 5730 years. This means it takes 5730 years for half of the carbon-14 atoms to decay to carbon-12 in a given sample (eg: 100 carbon-14, one half life = 50 carbon-14, 50 carbon-12).

Explanation:

8 0
3 years ago
Read 2 more answers
How are the melting points and boiling points of molecular compounds usually different from those of ionic compounds
pentagon [3]
Melting points and boiling points of molecular compound are usually lower than ionic compounds. This is so as only a small amount of energy is required to overcome the weak intermolecular forces of attraction (Van de Waals forces) thus having lower m.p. and b.p.

Ionic compounds require a large amount of energy to overcome the strong electrostatic forces of attraction between the ions, hence having higher mp and bp
6 0
3 years ago
A black rock that produces heat
leva [86]
Anything carbon in composition
4 0
3 years ago
Read 2 more answers
Other questions:
  • The half-life of carbon-14 is 5,715 years. After 29,000 years (5 half-lives) have elapsed, how much carbon-14 remains in a sampl
    14·1 answer
  • A system is in equilibrium when the rate of the forward reaction is equal to the rate of the reverse reaction.
    6·1 answer
  • Which description best fits a gas? definite shape and volume; strong intermolecular attractions definite volume; shape of contai
    15·1 answer
  • When did homo spiens leave africa
    8·1 answer
  • What type of particles will a hot object have if it has more kinetic energy?
    11·1 answer
  • 25 POINTS
    14·2 answers
  • Which represents the empirical formula for A3Bg?
    8·1 answer
  • Mutations are changes in the genes of living things. Mutations are common in all life forms and usually harmless. In fact, somet
    9·2 answers
  • Identify Z in the following reaction
    15·1 answer
  • When 2.5 g of blue copper(ii) sulfate crystals were heated, 1.6 g of a white solid were left in tube A
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!