3 years ago

In a motor, the_____of output work to input work,expressed as a percentage, is the efficiency of the motor.

Chemistry

1 answer:

BartSMP [9]3 years ago

8 0

In a motor, the RATIO of output work to input work, expressed as a percentage, is the efficiency of the motor.

Answer : Ratio

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Which of the four models represents a solid

ICE Princess25 [194]

Answer:

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3 years ago

In the equation KClO3 -> KCl + O2, how many moles of oxygen are produced when 3.0 mol of KClO3 decomposes completely?

IceJOKER [234]

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3 years ago

Read 2 more answers

A bike rider approaches a hill with a speed of 8.5 m/s. The total mass of the bike and the rider is 85 kg. Find the kinetic ener

krek1111 [17]

KE=3070.625 J

Height = 3.686 m

<h3>Further explanation</h3>

mass of bike+rider=85 kg

velocity = 8.5 m/s

$\tt KE=\dfrac{1}{2}mv^2\\\\KE=\dfrac{1}{2}\times 85\times 8.5^2\\\\KE=3070.625~J$

Conservation of energy :

(KE+PE)₁ (downhill) = (KE+PE)₂ (up the hill)

PE₁=0⇒h=0

KE₂=0⇒v=0(stop), so equation becomes :

KE₁=PE₂

$\tt KE_1=3070.625\\\\KE_1=mgh_2\\\\3070.625=85\times 9.8\times h\Rightarrow h=3.686~m$

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3 years ago

An artifact contains 1/4 as much carbon-14 as the atmosphere. How old is the artifact

musickatia [10]

The artifact appears to have gone through 2 half-lives.
One half-life for Carbon-14 is 5730 years.
After 5730 years, there would be 1/2 as much carbon-14
After another 5730 years, there would be 1/4 as much carbon-14

The answer is roughly 11,460 years

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3 years ago

David went shopping with his mom for house renovations supplies. They were looking for materials that would conduct electricity.

maxonik [38]

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3 years ago