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
Alexxx [7]
3 years ago
11

An energy-saving light bulb has an efficiency of 45%. If 5W of light is emitted, what electrical power is required

Physics
1 answer:
Gwar [14]3 years ago
3 0

Answer:

If you're using the bulb as a source of light, then it's. 14/60 = 23.3% efficient.

If you're using it to heat a bird nest or a hamster cage, then it's. 46/60 = 76.7% efficient !

It just depends on your point of view, and what you consider 'useful' output.

You might be interested in
SP1b.
nata0808 [166]

Answer:

2 m/s^2, west

Explanation:

Vf=final velcoity

Vi=initial velocity

t=timw

a =  \frac{vf - vi}{t}

=

\frac{15 - 25}{5}

= - 2 m/s^2

The - changes direction and makes it opposite

2 m/s, west

3 0
2 years ago
Consider electromagnetic waves in free space. What is the wavelength of a wave that has the following frequencies? (a) 4.10 x 10
navik [9.2K]

Explanation:

To find the answer use the equation speed of light=wavelength multiplied by frequency (c=lambda*f) by substituting the value for the frequency the the speed of light

7 0
3 years ago
Someone please answer this, ill give you brainliest and your earning 50 points.
Tema [17]

All of the following are non-renewable resources except

O natural gas

O oil

O minerals

O <em>water ✓ </em>

  • <em>Water </em><em>is </em><em>a </em><em>renewable </em><em>source </em><em>because </em><em>evaporation </em><em>and </em><em>condensation </em><em>takes </em><em>place </em><em>everytime </em><em>on </em><em>our </em><em>planet</em>
3 0
1 year ago
Read 2 more answers
In order for an object to have a perfectly circular orbit, what one thing must occur?
ryzh [129]

Answer:

The second one is correct.

Explanation:

=

3 0
2 years ago
How strong is the electric field between the plates of a 0.86 µf air-gap capacitor if they are 2.0 mm apart and each has a char
Gala2k [10]
The electric field between the plates is equal to the potential difference across the plates divided by the separation of the plates.
The potential difference across the plates is equal to the charge stored divided by the capacitance.
7 0
2 years ago
Other questions:
  • Compressed gases aren't ideal. Let's consider a gas that's non-ideal only because the volume available to each of the N molecule
    10·1 answer
  • A large crate with mass m rests on a horizontal floor. The static and kinetic coefficients of friction between the crate and the
    5·2 answers
  • A car of mass 1500 kg travels due East with a constant speed of 25.0 m/s. Eventually it turns right, and travels due South with
    7·1 answer
  • Who is the scientist that gave us the photon as a way of describing light as a particle?
    15·1 answer
  • Water is used to cool down automobile engines when they get hot. Why is water used as a coolant? A. Water is a good conductor. B
    15·2 answers
  • A 60 kg skier starts from rest at the top of a frictionless slope of height of 35 meters. The velocity at the bottom is v. If a
    14·2 answers
  • The switch is moved to position A at t = 0. a) What is the time constant in position A b ) How long does it take the capacitor v
    11·1 answer
  • Can anyone pls help me with this I’ll appreciate it. I’m trying to study for a test but I don’t know the answer to this.
    11·1 answer
  • a) CALCULATE the acceleration of a 300,000 kg jumbo jet, just before takeoff when the thrust of each of its 4 engines is 36,000
    9·1 answer
  • What do we mean when we say that particles such as neutrinos or wimps are weakly interacting?.
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!