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3 years ago

I need help thanks I would appreciate your in-depth explanation thanks.

Physics

2 answers:

svlad2 [7]3 years ago

5 0

Answer:

The coin is less dense than the water thefore it can float.

Explanation:

andriy [413]3 years ago

5 0

Answer:

It is the concept pf surface tension that helps the coin to float on the top of the water in the glass. The surface tension acts just opposite to the gravitational force and that is why when any metal placed in the water it will float and come on the surface.

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Twin A makes a one way trip at 0.6c to a star 12 light years away while twin B stays on Earth. Each twin sends the other a signa

hram777 [196]

Answer:

8 signals received by twin A during the trip.

Explanation:

Given that,

Distance = 12 light year

Speed = 0.6 c

Time = 1 year

We need to calculate the time by A

Using formula of time

$T=t\sqrt{\dfrac{1+\dfrac{v}{c}}{1-\dfrac{v}{c}}}$

Put the value into the formula

$T=1\sqrt{\dfrac{1+0.6}{1-0.6}}$

$T=2\ years$

Similarly,

The expression for distance cover by A

$D=d\sqrt{1-\dfrac{v^2}{c^2}}$

$D=12\sqrt{1-(0.6)^2}$

$D=9.6\ ly$

We need to calculate the time

Using formula of time

$t=\dfrac{D}{v}$

$t=\dfrac{9.6}{0.6}$

$t=16\ years$

We need to calculate the signals received by twin A

Using formula for number of signals

$n=\dfrac{t}{T}$

Put the value into the formula

$n=\dfrac{16}{2}$

$n=8\ signals$

Hence, 8 signals received by twin A during the trip.

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3 years ago

Decreasing the temperature of a reaction decreases the reaction rate because

RoseWind [281]

D) decreasing the temperature lowers the average kinetic energy of the reactants.

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A 46 g domino slides down a 30 degrees incline at a constant speed. What is the coefficient of friction?

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How are electromagnetic waves different from all other waves

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Answer:

Electromagnetic waves differ from mechanical waves in that they do not require a medium to propagate. This means that electromagnetic waves can travel not only through air and solid materials, but also through the vacuum of space.

Explanation:

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<em>(Please mark this answer as Brainliest and leave a Thanks if I helped you!)</em>

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3 years ago

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