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irga5000 [103]
3 years ago
9

What type of device is a car engine?

Physics
1 answer:
Serjik [45]3 years ago
5 0

D A heat engine that uses heat to do work

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Use F = 1/T as your basis:
DaniilM [7]
  • Frequency=60Hz

\\ \rm\rightarrowtail \nu=\dfrac{1}{T}

\\ \rm\rightarrowtail T=\dfrac{1}{\nu}

\\ \rm\rightarrowtail T=\dfrac{1}{60}

\\ \rm\rightarrowtail T=1.67\times 10^{-4}s

\\ \rm\rightarrowtail T=16.7\times 10^{-3}s

\\ \rm\rightarrowtail T=16.7ms

5 0
2 years ago
A thin, rectangular sheet of metal has mass M and sides of length a and b. Find the moment of inertia of this sheet about an axi
Lubov Fominskaja [6]

Answer:

The moment of inertia is I=\frac{M}{12} a^{2}

Explanation:

The moment of inertia is equal:

I=\int\limits^a_b {r^{2} } \, dm

If r is -\frac{a}{2}

and dm=\frac{M}{a} dr

I=\int\limits^a_b {r^{2}\frac{M}{a}  } \, dr\\a=\frac{a}{2} \\b=-\frac{a}{2}

I=\frac{M}{a} \int\limits^a_b {r^{2}  } \, dr\\\\I=\frac{M}{a} (\frac{M}{3} )_{b}^{a}\\  I=\frac{M}{3a} (\frac{a^{3} }{8} +\frac{a^{3} }{8} )\\I=\frac{M}{12} a^{2}

7 0
4 years ago
Define the focus of a concave lens ​
Sophie [7]

Answer:

<u>Principal</u><u> </u><u>focus</u><u> </u><u>of</u><u> </u><u>concav</u><u>e</u><u> </u><u>lens</u><u> </u><u>-</u><u> </u>

★ The point at which rays parallel to principal axis coming from infinity appear to converge after being refracted from concave lens is called the principal focus of concave lens.

<em><u>_</u></em><em><u>_</u></em><em><u>_</u></em><em><u>_</u></em><em><u>_</u></em><em><u>_</u></em><em><u>_</u></em><em><u>_</u></em><em><u>_</u></em><em><u>_</u></em><em><u>_</u></em><em><u>_</u></em><em><u>_</u></em><em><u>_</u></em><em><u>_</u></em><em><u>_</u></em><em><u>_</u></em><em><u>_</u></em><em><u>_</u></em><em><u>_</u></em><em><u>_</u></em><em><u>_</u></em><em><u>_</u></em><em><u>_</u></em>

• <u>Additional</u><u> information</u><u> </u><u>-</u><u> </u>

★ Principal focus - A number of rays parallel to the principal axis after reflection from a concave mirror meet at a point on the principal axis or appear to come from a point after reflection from a convex mirror on the principal axis. This is called principal focus.

8 0
3 years ago
HELP ME PLEASE! IF NOT THEN DON'T ANSWER PLEASE. THANK YOU!
igor_vitrenko [27]

Explanation:

9N and 7N is answered and you know this a

5 0
3 years ago
Read 2 more answers
Which of the following situations would cause the greatest decrease in the motion of molecules in a system?
pashok25 [27]

C. Q= +50 J,W= +50 J

3 0
4 years ago
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