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3 years ago

A machine can never be 100% efficient because some work is always lost due to what?

2 answers:

8 0

A machine can never be 100% efficient because some work is always lost due to the lack of materials or equipment that would convert work by 100%. It follows the second law of entropy. The ideal engine is known as Carnot’s engine having a 100% efficiency. So far, no engine has ever gotten to 100%.

kari74 [83]3 years ago

8 0

Answer:

Friction

Explanation:

Ik cuz i took tha test, i wouldn't lie to fellow students <3

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which of the following are vector quantities? check all that apply. a. force b. acceleration c. displacement d. mass

Ratling [72]

Force, acceleration, and Displacement are all vector quantities.

4 0

4 years ago

Which subatomic particle has the smallest mass?

spin [16.1K]

Answer:

quark

Explanation:

neutrón= 1.675 x 10-27 kg

proton=1,673 x 10-27 kg

electron=9,11 x 10-31 kg

quark=7,13 - 14,26 · 10−30 kg

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2 years ago

The magnetic flux through a loop:

dexar [7]

Answer:

The magnetic flux through a loop is zero when the B field is perpendicular to the plane of the loop.

Explanation:

Magnetic flux are also known as the magnetic line of force surrounding a bar magnetic in a magnetic field.

It is expressed mathematically as

Φ = B A cos(θ) where

Φ is the magnetic flux

B is the magnetic field strength

A is the area

θ is the angle that the magnetic field make with the plane of the loop

If B is acting perpendicular to the plane of the loop, this means that θ = 90°

Magnetic flux Φ = BA cos90°

Since cos90° = 0

Φ = BA ×0

Φ = 0

This shows that the magnetic flux is zero when the magnetic field strength B is perpendicular to the plane of the loop.

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3 years ago

Read 2 more answers

How does the ocean influence global climate?

Korvikt [17]

By absorbing solar radiation and releasing heat needed to drive the atmospheric circulation

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3 years ago

Jennifer works for an automaker and tests the safety performance of cars. she watches a 2,000-kilogram car crash into a wall wit

Kipish [7]

The acceleration of the car at impact is 15m/s².

<h3>What is Newton's Second Law of Motion?</h3>

Newton's second law provides a precise explanation of the modifications that a force can make to a body's motion. According to this, a body's momentum changes at a rate that is equal to the force acting on it over time in both magnitude and direction. A body's momentum is equal to the sum of its mass and velocity. Similar to velocity, momentum has both a magnitude and a direction, making it a vector quantity.

acceleration - rate of change of velocity with time, both in terms of speed and direction. A point or object going straight forward is accelerated when it accelerates or decelerates.

There are three types of accelerated motions :

uniform acceleration,
non-uniform acceleration
average acceleration.

express all the units in their most basic form.

kg, newton = kg*m/s², acceleration =m/s²

$\frac{ 30000 kg*m/s^{2} }{ 2000 kg} = 15m/s^{2}$

to learn more about Newton's Second law of Motion - brainly.com/question/13447525

#SPJ4

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1 year ago