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Lilit [14]
3 years ago
8

Why is gravitational force always towards the center?

Physics
2 answers:
lesya692 [45]3 years ago
6 0

Answer:

i beleave cuz of the Earth is spherical

Explanation:

Ira Lisetskai [31]3 years ago
4 0
Because of the definition of gravity, point-mass, and centre of mass, the centre of mass will always be the point at which gravitational forces of the surrounding mass on any opposite sides are exactly equal
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4 years ago
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A flat disk, a solid sphere, and a hollow sphere each have the same mass m and radius r. The three objects are arranged so that
Aloiza [94]

Answer:

b)

Explanation:

Rotational inertia of the sphere: \frac{2}{5}mr^2

Rotational inertia of hollow sphere: \frac{2}{3}mr^2

Rotational inertia of flat disk: \frac{1}{2}mr^2

The largest value is 2/3 mr², therefore, hollow sphere's inertia is largest.

7 0
3 years ago
An airplane, diving at an angle of 50.0° with the vertical, releases a projectile at an altitude of 554. m. The projectile hits
Valentin [98]

Answer:

Speed of the aircraft = 36.64 m/s

Explanation:

Consider the vertical motion of the projectile,

We have equation of motion s = ut+0.5at²

Let the velocity of plane be v.

Vertical velocity = vsin55 = Initial velocity of projectile in vertical direction = u

acceleration, a = 9.81 m/s²

displacement , s = 554 m

time, t = 8 s

Substituting,

             554 = vsin55 x 8 +0.5 x 9.81 x 8²

             v = 36.64 m/s

Speed of the aircraft = 36.64 m/s

3 0
4 years ago
Which has a greater buoyant force on it, a 35.0-cm3 piece of wood floating with part of its volume above water or a 35.0-cm3 pie
allsm [11]

The iron has, because it's displacing more water than the wood is.

7 0
3 years ago
The battery charger for an mp3 player contains a step-down transformer with a turns ratio of 1:29, so that the voltage of 120 v
kifflom [539]
Transformer contains two coils: primary and secondary. They allow change of voltage to lower or higher value. In first case we have step-down and in second case we have step-up transformer.

Formula used for transformer is:
\frac{ N_{1} }{N_{2} } = \frac{ V_{1} }{V_{2} }

Where:
N1 = number of turns on primary coil
N2 = number of turns on secondary coil
V1 = voltage on primary coil
V2 = voltage on secondary coil

In a step-down transformer primary coil has more turns than secondary coil. So the ratio 1:29 means that for each turn on secondary coil we have 29 turns on primary coil.

We can solve the equation for V2:
{V_{2}}=\frac{ V_{1}{N_{2} }  }{N_{1} } \\  {V_{2}}=\frac{ 120*{x }  }{29x } \\  {V_{2}}=4.14V

Secondary coil provides voltage of 4.14V.
8 0
4 years ago
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