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2 years ago

All machines are less than 100% efficient. True False

Physics

2 answers:

san4es73 [151]2 years ago

6 0

Answer:

false

Explanation:

because no machines have 100% efficient

Ugo [173]2 years ago

5 0

Answer:

false

Explanation:

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

Alexeev081 [22]

All are vector quantities except b. mass

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3 years ago

Read 2 more answers

A 7.25 kg7.25 kg block is sent up a ramp inclined at an angle ????=28.5°θ=28.5° from the horizontal. It is given an initial velo

Free_Kalibri [48]

Answer:

15.03 m

Explanation:

Given:

mass of the block, m = 7.25 kg

Angle, Θ = 28.5°

Initial speed of the block, v₀ = 15 m/s

let the distance traveled by the block be 's'

Now, applying the work energy theorem,

we have

$(m\times g\times\sin(\theta)\times s) + \mu_k\times mg\times s\times cos(\theta) = \frac{1}{2}\times m\times v^2$

on substituting the values in the above equation, we get

$(7.25\times 9.8\times\sin(28.5^o)\times s) + 0.326\times 7.25\times9.8\times s\times cos(28.5^o) = \frac{1}{2}\times 7.25\times 15^2$

$33.902\times s) +20.35\times s = 815.625$

$54.252\times s = 815.625$

s = 15.03 m

Hence, the block will travel 15.03 m up the ramp

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3 years ago

Using Kepler's 3rd Law of Planetary motion, determine the distance between the Earth and the center of the Moon.

Ira Lisetskai [31]

Answer: the distance earth to moon is about 238,855 miles

Explanation:

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3 years ago

Match to the correct answers

yarga [219]

A. You measure power on watts.
B. Non-renewable
C.renewable
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E. Fossil fuels

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3 years ago

Most reactive non-metals in order?

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Carbon
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Oxygen
Fluorine
Phosphorus 
Sulfur
Chlorine 
Selenium 
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3 years ago

All machines are less than 100% efficient. True False​

All machines are less than 100% efficient. True False