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marysya [2.9K]
3 years ago
12

Which scenario best describes motion? a toy train in position 4 on a number line a race track that is 100 meters long a ball rol

ling from point A to point B a student living 150 miles from Chicago
Physics
2 answers:
Alexxx [7]3 years ago
8 0

ball rolling from point A to point B

leva [86]3 years ago
6 0
The toy train, the race track, and the student aren't moving.

The rolling ball is, so it's an example of motion.

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Two long, parallel wires are separated by 2.2 mm. Each wire has a 32-AA current, but the currents are in opposite directions. Pa
Alex

Answer:

B=1.1636*10^{-3}T

Explanation:

Given data

d_{wires}=2.2mm=0.022m\\ I_{current}=32A\\

To find

Magnitude of the net magnetic field B

Solution

The magnitude of the net magnetic field can be find as:

B=2*u\frac{I}{2\pi r}\\ B=2*(4\pi*10^{-7}  )\frac{32}{2\pi (0.022/2)} \\ B=1.1636*10^{-3}T

3 0
3 years ago
I really don’t know the answer for this
EleoNora [17]
The correct answer is the reverse wave I took the test
6 0
3 years ago
Consider two sizes of disk, both of mass M. One size of disk has radius R; the other has radius 4R. System A consists of two of
Harman [31]

Answer:

4 smaller disks

Explanation:

We are given;

Mass of smaller and larger disks = M

Radius of smaller disk = R

Radius of larger disk = 4R

Formula for moment of inertia about cylinder axis is:

I = ½MR²

Thus;

For small disk, I_small = ½MR²

For large disk, I_large = ½M(2R)² = 2MR²

We are told that moment of inertia of System A consists of two of the larger disks. Thus;

I_A = 2 × I_large = 2 × 2MR²

I_A = 4MR²

We are also told that System B consists of one of the larger disks and a number of the smaller disks. Thus;

I_B = I_large + n(I_small)

Where n is the number of smaller disks.

I_B = 2MR² + n(½MR²)

I_B = MR²(2 + n/2)

We are told that the moment of inertia for system A equals the moment of inertia for system B. Thus;

I_A = I_B

So;

4MR² = MR²(2 + n/2)

MR² will cancel out to give;

4 = 2 + n/2

Multiply through by 2 to give;

8 = 4 + n

n = 8 - 4

n = 4

5 0
3 years ago
Which of the following types of light can humans see with their eyes?
Hitman42 [59]
Humans can not see any of the above with their eyes

7 0
3 years ago
Please help me, please i will mark brainliest
abruzzese [7]

Answer:

conductor,neither,insulator

Explanation:

conductors allow electricity to flow through while insulators do not

HOPE IT HELPS

5 0
2 years ago
Read 2 more answers
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