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11Alexandr11 [23.1K]
2 years ago
3

The energy output of a blender is 1.4 kWh. If the blender is 85% efficient, how much energy is lost to the surroundings? kWh

Physics
2 answers:
jenyasd209 [6]2 years ago
5 0

Answer:

The correct answer is 0.25

Explanation:

steposvetlana [31]2 years ago
4 0

Answer: 0.3 Kwh


Explanation:


1) Data:

a) energy output = 1.4 kWh

b) efficiency =  85%

c) energy loss = ?


2) Formulas

a) efficieny = (energy output / energy input) × 100

b) energy loss = energy input - energy output


3) Solution

a) energy output

efficiency = (energy output / energy input) × 100 ⇒

energy input = energy output × 100 / efficiency = 1.4 Kwh × 100 / 85 ≈ 1.7 Kwh


b) energy loss = 1.7 Kwh - 1.4 Kwh = 0.3 Kwh.


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A 1.00-kilogram ball is dropped from the top of a building. just before striking the ground, the ball's speed is 12.0 meters per
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2 years ago
Calculate the current through a 10.0-m long 22-gauge nichrome wire with a radius of 0.321 mm if it is connected across a 12.0-V
Kipish [7]

Answer:

Therefore,

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Explanation:

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Length = l = 10 meter

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Current, I =?

Solution:

Resistance for 0.0-m long 22-gauge nichrome wire with a radius of 0.321 mm if it is connected across a 12.0-V battery given as

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R = Resistance

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Substituting the values we get

R=\dfrac{1\times 10^{-6}\times 10}{3.14\times (0.321\times 10^{-3})^{2}}

R=\dfrac{1\times 10^{-5}}{3.23\times 10^{-7}}

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4 0
2 years ago
Which of the following expressions will have units of kg⋅m/s2? Select all that apply, where x is position, v is velocity, m is m
netineya [11]

Answer: m \frac{d}{dt}v_{(t)}

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In the image  attached with this answer are shown the given options from which only one is correct.

The correct expression is:

m \frac{d}{dt}v_{(t)}

Because, if we derive velocity v_{t} with respect to time t we will have acceleration a, hence:

m \frac{d}{dt}v_{(t)}=m.a

Where m is the mass with units of kilograms (kg) and a with units of meter per square seconds \frac{m}{s}^{2}, having as a result kg\frac{m}{s}^{2}

The other expressions are incorrect, let’s prove it:

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Answer:

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The correct answer is c

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2 years ago
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