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4 years ago

How do magnets act when they are near eachother ?

Physics

1 answer:

Andreas93 [3]4 years ago

5 0

Answer:

if they are different side they attract

if they are the same side they oppose each other ( don't go together)

Explanation:

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Communication satellites are often put in a geo-synchronous orbit, meaning they have an orbital period of 24 hours and stay over

xxMikexx [17]

Answer:

h = 35857 km

Explanation:

A geosynchronous orbit can be defined as circular orbit which lies on the Earth's equatorial plane and follows the direction of the Earth's rotation in a period that's equal to the Earth's rotational period and thereby appearing motionless, at a fixed position in the sky relative to the ground observers.

We are given;

Radius of earth(R) = 6.37 x 10^(6) m

Mass of earth (Me) = 5.97 x 10^(24) kg

Gravitational constant = 6.67 × 10^(-11) m³/kg.s²

The earth has a rotational period of 24 hours per day. This gives in seconds

T = 24 × 60 × 60

T = 86400 s

Let's make the height of the orbit from Earth's surface to be h

Also, let ω be the uniform angular velocity in rad/s with which the satellite rotates in the geosynchronous orbit

Now, equating the centripetal force with the gravitational force gives us;

mω²(R + h) = G•Me•m/(R + h)²

m will cancel out. Also ω can be written as 2π/T

Thus,we now have;

(R + h) = ∛(G•Me•T²/(4π²))

Plugging in the relevant values, we have;

(R + h) = ∛(6.67 × 10^(-11) × 5.97 x 10^(24) × 86400²/(4π²))

(R + h) = 42227 Km

Since R = 6.37 x 10^(6)m = 6370 km

Thus;. h = 42227 - 6370 = 35857 km

3 0

3 years ago

a straight wire that is 0.60m long and carrying a current of 2.0a is placed at an angle with respect to a magnetic field of stre

Rashid [163]

Answer:

The angle is $\theta = 30^o$

Explanation:

From the question we are told that

The length of the wire is $l = 0.60 \ m$

The current is $I = 2.0 \ A$

The magnetic field strength is $B = 0.30 \ T$

The magnitude of the magnetic force is $F _b = 0.18 \ N$

Generally the magnetic force exerted on the wire is mathematically represented as

$F_b = I * l * B * sin \theta$

Making $\theta$ the subject

$\theta =sin^{-1} [ \frac{ F_b }{I * l * B } ]$

substituting values

$\theta =sin^{-1} [ \frac{ 0.18 }{ 2.0 * 0.6 * 0.3 } ]$

$\theta = 30^o$

8 0

3 years ago

A well labelled diagram of outdoor thermometer

ElenaW [278]

Hope it helps u! :)

ANSWER:

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3 years ago

How does gravity correspond to the bending of the space-time fabric

Klio2033 [76]

The bigger the mass of an astronomical object the bigger the depression it causes in the space-time fabric. Any other astronomical object that gets closer to this depression begins to fall into the depression and hence accelerates closer to the astronomical object causing the depression. This is how gravity is felt.

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4 years ago

The idea that people behave in odd ways on a full moon is an example of

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Superstition i think.....

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3 years ago

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