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
Arturiano [62]
3 years ago
8

How much money does a mixer use if the efficiency is 50% and it wastes 20J of energy ?

Physics
1 answer:
GalinKa [24]3 years ago
5 0

Answer:

Ei = 40J

Explanation:

Given the following data;

Efficiency = 50%

Energy output, Eo = 20 J

To find the amount of energy used by the mixer:

Efficiency = Eo/Ei * 100

Where;

Eo is the output energy.

Ei is the input energy.

Substituting into the formula, we have;

50 = 20/Ei * 100

Cross-multiplying, we have;

50Ei = 2000

Ei = 2000/50

Ei = 40J

You might be interested in
A xenon arc lamp is covered with an interference filter that only transmits light of 400-nm wavelength. When the transmitted lig
zepelin [54]

Answer:

3. both are true.

Explanation:

Energy increses with decrease in wavelenght.

For photoemission to occur, a threshold energy barrier must be broken.

Higher energy means more electrons will be emmited.

The electrons emmited will posses energy that is less than the incident energy by the value of the threshold energy.

So the higher the energy, the higher the energy possessed by the electrons.

4 0
3 years ago
Read 2 more answers
PROBLEMA DI FISICA:il volume di un attizzatoio da camino in ferro, a temperatura ambiente (20°C), è 12,2 cm cubi. A contatto con
lesantik [10]

Responder:

20.3 ° C

Explicación:

<u>Según la ley de Charles</u>: <em>cuando la presión sobre una muestra de gas seco se mantiene constante, la temperatura y el volumen estarán en proporción directa. </em>

Paso uno:

datos dados

Temperatura T1 = 20 ° C

Temperatura T2 =?

Volumen V1 = 12.2 cm ^ 3

Volumen V2 = 12.4 cm ^ 3

Aplicar la relación temperatura y volumen

\frac {V_{1}}{T_{1}}=\frac {V_{2}}{T_{2}}

sustituyendo tenemos

\frac {12.2}{20}=\frac {12.4}{T_{2}}\\\\

Cruz multiplicar tenemos

T_2=\frac{20*12.4}{12.2} \\\\T_2=\frac{248}{12.2}\\\\T_2=20.3

Temperatura delle braci 20.3°C

4 0
3 years ago
Could an<br> average star, such as our<br> sun, become a neutron star?<br> Explain your answer.
larisa86 [58]
<span>No. Neutron stars are the remnants of very large stars that have supernova'd. Anything below 1.44 solar masses becomes a dwarf, anything above 5 solar masses becomes a black hole. Everything in between becomes a neutron star (or quark star, but it's not proven).</span>
5 0
3 years ago
The LR5 is the specialist submarine for underwater rescue. The average density of seawater is 1028 kg/ m3.
sladkih [1.3K]

Answer:

P = 7196 [kPa]

Explanation:

We can solve this problem using the expression that defines the pressure depending on the height of water column.

P = dens*g*h

where:

dens = 1028 [kg/m^3]

g = 10 [m/s^2]

h = 700 [m]

Therefore:

P = 1028*10*700

P = 7196000 [Pa]

P = 7196 [kPa]

5 0
3 years ago
A proton and an electron are moving in the +x direction in a magnetic field in the +z
Aleksandr [31]

Answer:

Explanation:

Force on a moving charge is given by the following relation

F = q ( v x B )

for proton

q = e  ,   v = vi  , B = Bk

F = e ( vi x Bk )

= Bev - j

= - Bevj

The direction of force is along negative of y axis or -y - axis.

for electron

q = - e  ,   v = vi  , B = Bk

F = - e ( vi x Bk )

= - Bev - j

=  Bevj

The direction of force is along positive  of y axis or + y - axis.

5 0
3 years ago
Other questions:
  • How does electronic duster work​
    6·2 answers
  • A 50.0-kg box rests on a horizontal surface. The coefficient of static friction between the box and the surface is 0.300 and the
    8·1 answer
  • How do you calculate energie
    6·2 answers
  • A block of a plastic material floats in water with 35.6% of its volume under water. What is the density of the block in kg/m3
    9·1 answer
  • The greater the amplitude, the greater the wave's:
    9·1 answer
  • What is the term that describes<br> the material through which a wave travels?
    7·1 answer
  • An electric heater is madde of a wire of resistance 100π and connected to a 240v mains supply. Determine the power rating of the
    15·1 answer
  • A person of weight mg, is standing on a scale in an elevator. What will the
    5·1 answer
  • A centrifuge is a device that rotates an object to produce an acceleration many times that of gravity Pilots are trained in such
    15·1 answer
  • A elephant kicks a 5.0 kg stone with 150 J of kinetic energy.
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!