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3 years ago

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:

Principal focus of concave lens - 

★ 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.

________________________

• Additional information - 

★ 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