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ryzh [129]
3 years ago
13

A boy drops a coin down a well that is 225 m deep. How long does it take the coin to hit the bottom of the well? (Please state y

our final answer)
Physics
1 answer:
Alexxandr [17]3 years ago
7 0
I had the same question. I'm pretty sure it's 23 seconds. :)
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A bar slides vertically between two conducting rails without friction in a magnetic field. The rails are connected via a resisto
Gala2k [10]

Answer:

The energy dissipated is  E =  9.8 J

Explanation:

From the question we are told that

    The distance covered at constant velocity d =  2 m  

      The velocity is  v = 1.5 \ m/s

Generally at constant velocity the magnetic  force on the bar is mathematically represented as

         F  =  m * g

substituting values

        F  =   0.5 *  9.8

        F  =   4.9 \ N

The energy dissipated is mathematically evaluate as

         E =  F * d

 substituting the value

         E =  4.9  * 2

        E =  9.8 J

     

3 0
4 years ago
If my mass is 105 kilograms; what is my weight on Earth?
lyudmila [28]

Answer:

1029N

Explanation:

use W =mg and get answer

6 0
3 years ago
In most cases, letters of reconmendation are required for addmission to?
kykrilka [37]

Answer:

Get your recommenders to mention diverse achievements. ...

Help your recommenders with relevant info. ...

The letter should always include examples of things you did. ...

The letter should show how you improved over time. ...

The tone of the letter should not be too dry.

8 0
3 years ago
A nickel (5 cent coin) has a mass of 5.0 g. How many nickels are there in a stack of nickels with a mass of 10.0 kg?
Marrrta [24]

Answer:

2000 nickels

Explanation:

One way to solve proportionality problems, direct and inverse: the simple 3 rule.

If the relationship between the magnitudes is direct (when one magnitude increases so does the other), the simple direct rule of three must be applied.

On the contrary, if the relationship between the magnitudes is inverse (when one magnitude increases the other decreases) the rule of three simple inverse applies.

The simple 3 rule is an operation that helps us quickly solve proportionality problems, both direct and inverse.

To make a simple rule of three we need 3 data: two magnitudes proportional to each other, and a third magnitude. From these, we will find out the fourth term of proportionality.

In the simple three rule, therefore, the proportionality relationship between two known values ​​A and B is established, and knowing a third value C, a fourth value D is calculated.

A -> B

C -> D

Calculation

1 nickel --> 5 g

X? nickel --> 10000g

X = (10000 g * 1 nickel) / 5 g

X = 2000 nickels

7 0
3 years ago
You can do only number 1 only
Rzqust [24]

For 1000 seconds , a current of 0.1 A flows so as to transfer charge of 100C

6 0
3 years ago
Read 2 more answers
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