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ss7ja [257]
3 years ago
9

When a spacecraft travels away from Earth, the gravitational force acting on it

Physics
2 answers:
S_A_V [24]3 years ago
6 0
The correct answer is decreases

The further away you are the weaker it would be. That's why at one point you stop being in the field and ti doesn't pull you towards it anymore. Proportionally, if you move towards the Earth then it increases. 
Sindrei [870]3 years ago
4 0

Gravitational force on aircraft at some distance from the Earth is given as

F = \frac{Gm_1m_2}{r^2}

here we know that

m_1= mass of Earth

m_2 = mass of aircraft

r = distance between center of earth and aircraft

now as the aircraft is flying away from the surface of Earth so here the distance between them is increasing with the motion of aircraft

So as it moves away the force between them will decrease

So here we can say that

When a spacecraft travels away from Earth, the gravitational force acting on it  

<u>decreases</u>

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Calculate the Reynolds number for a person swimming through maple syrup. The density of syrup is about 1400 kg/m^3 and the visco
Tema [17]

Answer:

The Reynolds number is 5600.

Explanation:

Given that,

Density = 1400 kg/m³

Viscosity = 0.5 Pa's

Length = 2 m

Speed = 1 m/s

We need to calculate the Reynolds number

Using formula of Reynolds number

R_{e}=\dfrac{\rho V\times L}{\mu}

Where, \rho = density of fluid

v = speed of syrup

l = length of a person

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Put the all value into the formula

R_{e}=\dfrac{1400\times1\times2}{0.5}

R_{e}=5600

Hence, The Reynolds number is 5600.

5 0
3 years ago
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yulyashka [42]

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8 0
3 years ago
A proton moves perpendicular to a uniform magnetic field B at a speed of 2.30 107 m/s and experiences an acceleration of 2.50 10
Katen [24]

Answer:

B = 6.18 10⁻⁶ T  

the magnetic field is in the negative direction of the y axis

Explanation:

The magnetic force is given by

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as in the exercise indicate that the velocities perpendicular to the magnetic field,

         F = q v B

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let's substitute

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         B = m a / q v

let's calculate

         B = 9.1 10⁻³¹ 2.50 10¹³ / (1.6 10⁻¹⁹ 2.30 10⁷)

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The direction of the field can be obtained with the right hand rule, where the thumb points in the direction of the velocity, the fingers extended in the direction of the magnetic field and the palm in the direction of the force for a positive charge.

In the exercise indicate that the velocity is the z axis

the acceleration and therefore the force in the x axis

therefore the magnetic field is in the negative direction of the y axis

7 0
2 years ago
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