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
Vadim26 [7]
3 years ago
12

What is the energy efficiency of a light bulb that gives you 30 units of usable energy for every 100 units of energy put in to i

t?
a. 0.3
b. 3
c. 30
Chemistry
2 answers:
NeX [460]3 years ago
7 0

Answer:

Explanation:

Given parameters:

Energy output = 30units

Energy input = 100units

problem:

Energy efficiency of light bulb:

Solution:

 Efficiency is given as:

    Efficieny = \frac{energy_{output} }{energy_{input } x100

   Efficieny = \frac{30}{100} x 100 = 30%

 

vladimir2022 [97]3 years ago
6 0

Answer:

The correct answer is option a.

Explanation:

Efficiency is defined as the ratio of output energy to input energy.

Efficiency(e)=\frac{E_o}{E_i}

Energy given out by the system = E_o

Energy given to the system = E_i

Here we are given with : E_o-30 units,E_i=100

Efficiency of of a light bulb:

e=\frac{30 units}{100 units}=0.3

You might be interested in
An enzyme with molecular weight of 310 kDa undergoes a change in shape when the substrate binds. This change can be characterize
oee [108]

Answer:

(a) r = 6.26 * 10⁻⁷cm

(b) r₂ = 6.05 * 10⁻⁷cm

Explanation:

Using the sedimentation coefficient formula;

s =  M(1-Vρ) / Nf ; where s is sedimentation coefficient, M is molecular weight, V is specific volume of protein, p is density of the solvent, N is Avogadro number, f if frictional force = 6πnr, n is viscosity of the medium, r is radius of particle

s = M ( 1 - Vρ) / N*6πnr

making r sbjct of formula, r =  M (1 - Vρ) / N*6πnrs

Note: S = 10⁻¹³ sec, 1 KDalton = 1 *10³ g/mol, I cP = 0.01 g/cm/s

r = {(3.1 * 10⁵ g/mol)(1 - (0.732 cm³/g)(1 g/cm³)} / { (6.02 * 10²³)(6π)(0.01 g/cm/s)(11.7 * 10⁻¹³ sec)

r = 6.26 * 10⁻⁷cm

b. Using the formula r₂/r₁ = s₁/s₂

s₂ = 0.035 + 1s₁ = 1.035s₁

making r₂ subject of formula; r₂ = (s₁ * r₁) / s₂ = (s₁ * r₁) / 1.035s₁

r₂ = 6.3 * 10⁻⁷cm / 1.035

r₂ = 6.05 * 10⁻⁷cm

8 0
3 years ago
5. Inside the mouth, these cells are joined together in a sheet. Why are they scattered here?
anyanavicka [17]

Answer:

Inside the mouth, these cells are joined together in a sheet. Why are they scattered here? They are scattered here because we disrupted there original form by scrapping them off our mouths and smearing them on the slide.

Explanation:

5 0
3 years ago
The following exothermic reaction is allowed to reach equilibrium. What
Anon25 [30]
The answer is gonna be the last one :)
5 0
2 years ago
Potential energy is based on an objects
erma4kov [3.2K]

This is some information about the potential energy.

Explanation:

Please follow me...

3 0
2 years ago
Read 2 more answers
19. This type of bond involves the bonding of two ions of opposite charges
hammer [34]

Answer:

Covalent bond is a type of bond involves the bonding of two ions of opposite charges.

<h3><u>PLEASE</u><u> MARK</u><u> ME</u><u> BRAINLIEST</u><u>.</u></h3>
7 0
2 years ago
Other questions:
  • What is the total number of protons in an h2o atom?
    6·1 answer
  • Please help me solve? Chemistry
    7·1 answer
  • If a sample of cork has a mass of 2.88 g and a volume of 12.0 mL, what is the density of the cork? Show your work.
    6·1 answer
  • How can you be sure a solid is pure?
    10·1 answer
  • Which of the following is NOT an acceptable unit for reporting gas pressure?
    12·1 answer
  • 3. If there were multiple products comment on finding the mixture melting point of the products. Does your sample appear to be a
    14·1 answer
  • How do human beings prepare their food<br>​
    6·2 answers
  • Nombre de la siguiente estructura de compuesto orgánico
    8·1 answer
  • How did the scientists create atoms of element 115
    6·1 answer
  • What is the greenhouse effect?
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!