3 years ago

Which two statements are true of electromagnetic waves?

Physics

1 answer:

Usimov [2.4K]3 years ago

3 0

Answer:

B and C

Explanation:

Because EMWs are varying magnetic and electric radiation traveling at 90° to each other propagating energy form one place to another through vibration of these magnetic and electric fields

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Conventional current-

Kamila [148]

Answer:

B. I think I'm pretty sure

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3 years ago

A student claims that any object in motion must experience a force that keeps it in motion. Do you agree or disagree? Please exp

Tanya [424]

Answer:

i agree

Explanation:

because it is in motion sooo it has a force of course

if it doesn't experience emotional Force it will stop being in motion

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3 years ago

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A 3.00 m-long 6.00-kg ladder pivoted at the top hangs down from a platform at the circus. A 42.0-kg trapeze artist climbs to a p

statuscvo [17]

Answer:

The period of the system of ladder and woman, T = 2.5 seconds

Explanation:

Mass of the ladder, $m_1 = 6 kg$

Mass of the artiste, $m_2 = 42.0 kg$

Length of the ladder, L = 42.0 kg

The total moment of inertia can be calculated using the equation:

$I = \frac{1}{3} M_1 L^2 + m_2 (\frac{L}{2} )^2\\I = \frac{1}{3} *6*3^2 + 42* (\frac{3}{2} )^2\\I = 18 + 94.5\\I = 112.5 kg m^2$

D = L/2 = 3/2

D = 1.5 m

The frequency of the system of ladder and woman follows that of a physical pendulum which can be given by the equation:

$f = \frac{1}{2\pi } \sqrt{\frac{mgD}{I} } \\f = \frac{1}{2\pi } \sqrt{\frac{48*9.8*1.5}{112.5} }\\f = 0.4$

The period of the system of ladder and woman is given by:

T = 1/f

T = 1/0.4

T = 2.5 seconds

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3 years ago

Gold is called noble gas why

slamgirl [31]

This is what i found.
Gold is a noble element because "in chemistry, the noblemetals are metals that are resistant to corrosion and oxidation in moist air (unlike most base metals)."

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4 years ago

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9. You are heating a piece of glass and now want to pick it up, You should

drek231 [11]

Answer:

c. use tongs

Explanation:

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3 years ago