Ask question

Ask question

All categories

Angelina_Jolie [31]

3 years ago

14

A spring is 14cm long. Three masses are hung from it and then it is measured again. Now it is 19.5cm long. What force did the th

ree masses provide? The spring constant for the spring is 30N/m.

1 answer:

lukranit [14]3 years ago

3 0

Answer:

Gravity

Explanation:

The answer is gravity because when the 3 masses were hung from the spring, gravity pulled the spring towards the ground.

You might be interested in

The angular velocity of a 755-g wheel 15.0 cm in diameter is given by the equation ω(t) = (2.00 rad/s2)t + (1.00 rad/s4)t 3. (a)

Lunna [17]

Answer:

a

The number of radians turned by the wheel in 2s is $\theta= 8\ radians$

b

The angular acceleration is $\alpha =14 rad/s^2$

Explanation:

The angular velocity is given as

$w(t) = (2.00 \ rda/s^2)t + (1.00 rad /s^4)t^3$

Now generally the integral of angular velocity gives angular displacement

So integrating the equation of angular velocity through the limit 0 to 2 will gives us the angular displacement for 2 sec

This is mathematically evaluated as

$\theta(t ) = \int\limits^2_0 {2t + t^3} \, dt$

$= [\frac{2t^2}{2} + \frac{t^4}{4}] \left\{ 2} \atop {0}} \right.$

$= [\frac{2(2^2)}{2} + \frac{2^4}{4}] - 0$

$= 4 +4$

$\theta= 8\ radians$

Now generally the derivative of angular velocity gives angular acceleration

So the value of the derivative of angular velocity equation at t= 2 gives us the angular acceleration

This is mathematically evaluated as

$\frac{dw}{dt} = \alpha (t) = 2 + 3t^2$

so at t=2

$\alpha (2) = 2 +3(2)^2$

$\alpha =14 rad/s^2$

7 0

3 years ago

Which of the following are common sorces of radio waves ?

alexgriva [62]

It would help if there are some options, but some common sources:
Televisions
Microwave Ovens
Cell Phones
Satellites
Wired Computers
CD players
etc.

5 0

3 years ago

Susie operates a restaurant in the ski resort town of Asvail. She has decided to group her Other Expenses categories in terms of

nlexa [21]

Expenses including those for linen service, ice, and paper goods might fluctuate depending on demand. Other variables are constants. No change occurs to it. This is further explained below.

<h3>What is Susie's operation?</h3>

Generally, Fixed expenditures, in contrast to the more unpredictable variable costs like advertising, happen regularly at the same time each year regardless of fluctuations in revenue or other variables. It doesn't get the performance bus.

Here, we are given with table.

$\begin{tabular}{|c|c|c|}Other Expenses & Variable Expense & Fixed Expense. \\ Linen rental & $X$ & \\ piano rental & & $X$ \\ ice & $X$ & $X$ \\insurance & & $X$ \\ Pension plan & & $X$ \\Snow shoveling dees cparkinglot) & & \\Paper products & $X$ & $X$ \\ Kituen equipment & & $X$ \\ lease (mixer) & & \\Longterm debt. & & \\ Realestate tax. & & \\\end{tabular}$

In conclusion,

Linen rental, ice, and Paper Products are Variable expenses because it is based on requirement
Others are fixed by other factors. it's not affected

Read more about Expenses

brainly.com/question/17136150

#SPJ1

7 0

3 years ago

What kinds of bonds can happen between the elements of a compound

Anit [1.1K]

What kinds of bonds can happen between the elements of a compound?

<span>Covalent and Ionic</span>

4 0

3 years ago

Is 20 m scalar or neither

serious [3.7K]

Answer:

yes,20m is scalar

Explanation:

6 0

3 years ago