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Vilka [71]
3 years ago
14

Adanna is watching waves on the sea go past two buoys. She knows the buoys are 20 metres apart.

Physics
2 answers:
Alexxx [7]3 years ago
8 0

Answer:

speed = distance/time

Explanation:

kotykmax [81]3 years ago
6 0
She can take watch and note down time for one cycle to pass
and then maths
speed = distance/ time
if u have any doubts ask me
please mark as brainliest
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What intermolecular force is responsible for the attraction between an ion and a polar molecule?
Pani-rosa [81]

Answer:

Dipole ion forces

Explanation:

Dipole ion forces are attractive forces between an ion (an atom that has lost or gained an electron, so it has a charge) and a polar molecule. A molecule is a dipole when there is an asymmetric distribution of electrons because the molecule is made up of atoms of different electronegativity. The ion then attaches to the part of the molecule that has its opposite charge: the positive end of the polar molecule faces the anion (negatively charged ion) and the negative end of the polar molecule faces the cation ( positively charged ion).

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3 years ago
A wave's frequency is 2Hz and its wavelength is 4 m. What is the wave's speed?
sp2606 [1]
w=lambda*f \\ w=4m*2Hz \\ w=8
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Which planet is most likely to have acid rain? A. Mercury B. Venus C. Mars D. Uranus
timofeeve [1]
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3 0
3 years ago
An electrically neutral model airplane is flying in a horizontal circle on a 2.0-m guideline, which is nearly parallel to the gr
amm1812

Answer:

q=3.5*10^-4

Explanation:

<u>concept:</u>

The force acting on both charges is given by the coulomb law:

F=kq1q2/r^2

the centripetal force is given by:

Fc=mv^2/r

The kinetic energy is given by:

KE=1/2mv^2

<u>The tension force:</u>

<u><em>when the plane is uncharged </em></u>

T=mv^2/r

T=2(K.E)/r

T=2(50 J)/r

T=100/r

<u><em>when the plane is charged </em></u>

T+k*|q|^2/r^2=2(K.E)charged/r

100/r+k*|q|^2/r^2=2(53.5 J)/r

q=√(2r[53.5 J-50 J]/k)                                          √= square root on whole

q=√2(2)(53.5 J-50 J)/8.99*10^9

q=3.5*10^-4

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3 years ago
Describe the climate and name the climate zone at alaska; portland, oregon; and key west, florida.
Tpy6a [65]
Alaska-                   Subartic Climate 
Portland, Oregon-  Marine West Coast Climate
Key West, Florida- Tropical Savannah Climate
3 0
3 years ago
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