3 years ago

Which change will always result in an increase in the gravitational force between two objects?

Physics

1 answer:

aleksklad [387]3 years ago

8 0

Answer:

increasing the masses of the objects and increasing the distance between the objects

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3 years ago

Which phrase most closely characterizes a person's sense of self?

vampirchik [111]

My guess would be choice D

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A source vibrating at constant frequency generates a sinusoidal wave on a string under constant tension. If the power delivered

Serjik [45]

Answer:

n = 1,732 the amplitude must be increased by a factor of 1,732

Explanation:

The power delivered by a wave is given by

P = E / t

P = ½ μ w² v A²

let's apply this expression to our case the power tripled

3P₀ = ½ μ w² v A’²

let's write the amplitude function of a initial amplitude

A ’= n A₀

where n is a number

3 P₀ = (½ μy w² v A₀²) n²

3P₀ = P₀ n²

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n = 1,732

therefore the amplitude must be increased by a factor of 1,732

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3 years ago

A coil 4.20 cm radius, containing 500 turns, is placed in a uniform magnetic field that varies with time according to B=( 1.20×1

erma4kov [3.2K]

Explanation:

Given that,

Radius of the coil, r = 4.2 cm

Number of turns in the coil, N = 500

The magnetic field as a function of time is given by :

$B=1.2\times 10^{-2}t+2.6\times 10^{-5}t^4$

Resistance of the coil, R = 640 ohms

We need to find the magnitude of induced emf in the coil as a function of time. It is given by :

$\epsilon=\dfrac{-d\phi}{dt}\\\\\epsilon=\dfrac{-d(NBA)}{dt}\\\\\epsilon=N\pi r^2\dfrac{-dB}{dt}\\\\\epsilon=N\pi r^2\times \dfrac{-d(1.2\times 10^{-2}t+2.6\times 10^{-5}t^4)}{dt}\\\\\epsilon=N\pi r^2\times (1.2\times 10^{-2}+10.4\times 10^{-5}t^3)\\\\\epsilon=500\pi \times (4.2\times 10^{-2})^2\times (1.2\times 10^{-2}+10.4\times 10^{-5}t^3)\\\\\epsilon=2.77(1.2\times 10^{-2}+10.4\times 10^{-5}t^3)\ V$

Hence, this is the required solution.

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3 years ago

Read 2 more answers

If velocity is positive, which woul

shusha [124]

Answer:

C. An inital volocity that is faster than the final volocity

Explanation:

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3 years ago