3 years ago

What happens to the size of the image as the focal length is increased?

Physics

1 answer:

natta225 [31]3 years ago

6 0

The parimiter expands

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A small child has a wagon with a mass of 10 kilograms. The child pulls on the wagon with a force of 2 Newton’s. What is the acce

Zina [86]

PHYSICS

Mass = 10 kg

Force = 2 N

Acceleration = ____?

Answers :

$f \: = m \times a$

2 = 10 × a

2 / 10 = a

0,2 m/s² = a ✅

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3 years ago

9. To completely describe the motion of an object, you need

pav-90 [236]

I think it’s D) all of the above

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Two circular coils are concentric and lie in the same plane. The inner coil contains 170 turns of wire, has a radius of 0.012 m,

GREYUIT [131]

Answer:

The current of the outer coil is $I_o = 3.99 \ A$

Explanation:

From the question we are told that

The number of turns of the inner coil is $N_i = 170 \ turn$

The radius of the inner coil is $R_i = 0.012 \ m$

The current of the inner coil is $I_i = 6.2 \ A$

The number of turns of the outer coil is $N_o = 220 \ turns$

The radius of the outer coil is $R_o = 0.02 0 \ m$

Generally the net magnetic field is mathematically represented as

$B = \frac{N \ mu I }{ 2 * R }$

Now from told that the net magnetic field is common

$\frac{N_i \mu I_i} {2 * R _i} = \frac{N_o \mu I_o} {2 * R _o}$

Here $\mu$ is the permeability of free space

making $I_o$ the subject

$I_o = \frac{ N_i I_i *2 * R _o}{N_o *2 * R _i}$

substituting values

$I_o = \frac{ 170 *6.2 *2 * 0.020}{220 *2 * 0.012}$

$I_o = 3.99 \ A$

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3 years ago

If the velocity of gas molecules is doubled, then it’s kinetic energy will?( hint formula for kinetic energy is KE=.5 x mv2)

eduard

Answer:

D quadruple

Explanation:

$E = \frac{1}{2}mv^2\\E'=\frac{1}{2}m(2v)^2=\frac{1}{2}m4 v^2 = 4(\frac{1}{2}mv^2)=4E$

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3 years ago

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Which of the following is NOT an example of a girl on a bike who is accelerating?

Serggg [28]

Answer:

the bike would not be moving

Explanation:

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3 years ago