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stira [4]
3 years ago
15

The eficiency of a simple machine can never be 100% why?​

Physics
1 answer:
Kitty [74]3 years ago
6 0

Answer:

Systems always tend toward a state of decreasing order unless more energy is provided into the system to counteract this tendency.

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a bag of cement is pulled along a horizontal plane by a constant force of 15n calculate the work done in moving the bag through
morpeh [17]

Answer:

300J

Explanation:

Given parameters:

Constant force = 15N

Distance  = 20m

Unknown:

Work done   = ?

Solution:

Work done is the force applied to move a body through a particular distance.

 Work done  = Force x distance

 So;

  Work done  = 15 x 20  = 300J

4 0
3 years ago
3. A drill spins with a frequency of 1200 RPM (revolutions per minute). What is its
Damm [24]
Your answer is 20
just take 1,200 divided by 60 [second] :)
6 0
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True or false. in science, a hypothesis must be true?
pishuonlain [190]
No.A hypothesis is an educated guess but it will not always be right
5 0
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What does a line segment with a zero slope from a position-time graph indicate about the motion of the object in that interval o
Blizzard [7]
the object is not moving
3 0
3 years ago
A room has a wall with an R value of 13 F sq.ft. hr/BTU. The room is 18 feet long and 8 feet wide with walls that are 8 ft high.
Burka [1]

Answer:

Carbon electrons are arranged in a way that makes it possible for them to form long chains. That also helps carbon maintain its properties.

Explanation:

Carbon electrons are arranged in a way that makes it possible for them to form long chains. That also helps carbon maintain its properties.

5 0
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