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enyata [817]
3 years ago
15

Explain why machine can"t be 100% efficient practically?​

Physics
2 answers:
inna [77]3 years ago
8 0
Retiro en la capital y se lo dijo que el gobierno no tiene la casa en el bus y el que no tiene que ver si no
Zigmanuir [339]3 years ago
5 0

Answer:

Heat

Explanation:

Heat is the main component in why everything is not 100% efficient. Heat is a byproduct of everything and cannot be avoided.

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Planets move around the sun in elliptical orbits. True. False
astra-53 [7]

this answer is true.

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In complete agreement​
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Explanation:

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An object has a mass of 50.0 g and a volume of 10.5 cm3. What is the object's density?
vagabundo [1.1K]
The density is 4.76 gcm^-3
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3 0
2 years ago
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A package is pushed across the floor a distance of 90 feet by exerting a force of 32 lbs downward at an angle of 24 ∘ with the h
Crazy boy [7]

Answer:

2632 foot-pound

Explanation:

Work done: Work is said to be done when ever a force moves a body through a given distance. The S.I unit of force is Newton (N).

From the question,

The expression for work done is given as,

W = Fdcos∅......................... Equation 1

Where W = work done, F = force, d = distance, ∅ = angle between the force and the horizontal.

Given: F = 32 lbs, d = 90 feet, ∅ = 24°

substitute into equation 1

W = 32×90×cos24

W = 2880(0.914)

W = 2632.32

W = 2632 foot-pound

4 0
3 years ago
Please help me quickly!
Hatshy [7]

Answer:

Living Things

Explanation:

Physical science is the study of the inorganic world. That is, it does not study living things. (Those are studied in biological, or life, science.) The four main branches of physical science are astronomy, physics, chemistry, and the Earth sciences, which include meteorology and geology.

7 0
3 years ago
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