Ask question

Ask question

All categories

Dmitry_Shevchenko [17]

3 years ago

8

A piano has a mass of 185 kg, and the coefficient of friction between it and the floor is 0.39. What is the maximum force of fri

ction between the piano and the floor?
707 N
523 N
1813 N
1208 N

2 answers:

Dimas [21]3 years ago

7 0

Coefficient of friction x mass x g

Nesterboy [21]3 years ago

4 0

707 N

185×0.39×9.8

I just did it and found the answer

You might be interested in

Focusing on irelevant information can negatively impact the ability to reason and problem solve effectively.

My name is Ann [436]

Answer:

true

Explanation:

3 0

3 years ago

Why are men typically less stable on their feet than women

Viktor [21]

Women generally have a lower centre of gravity than men, contributing to greater stability. Men generally have more muscle mass in their upper bodies,

8 0

3 years ago

Read 2 more answers

Ask Your Teacher In the air over a particular region at an altitude of 500 m above the ground, the electric field is 120 N/C dir

strojnjashka [21]

Answer:

$1.475\times 10^{-13}\ C/m^3$

Explanation:

$\epsilon_0$ = Permittivity of free space = $8.85\times 10^{-12}\ F/m$

A = Area

h = Altitude = 600 m

Electric flux through the top would be

$-110A$ (negative as the electric field is going into the volume)

At the bottom

$120A$

Total flux through the volume

$\phi=120-110\\\Rightarrow \phi=10A$

Electric flux is given by

$\phi=\dfrac{q}{\epsilon_0}\\\Rightarrow q=\phi\epsilon_0\\\Rightarrow q=10A\epsilon_0$

Charge per volume is given by

$\rho=\dfrac{q}{v}\\\Rightarrow \rho=\dfrac{10A\epsilon_0}{Ah}\\\Rightarrow \rho=dfrac{10\epsilon_0}{h}\\\Rightarrow \rho=\dfrac{10\times 8.85\times 10^{-12}}{600}\\\Rightarrow \rho=1.475\times 10^{-13}\ C/m^3$

The volume charge density is $1.475\times 10^{-13}\ C/m^3$

7 0

3 years ago

What must be part of a quantitative observation?

inna [77]

a number hope this helps

8 0

3 years ago

Read 2 more answers

The pressure of air pushing down on a house roof is extremely large. Why is the roof not crushed?

Degger [83]

There is still air inside of a house, which is pushing the roof upwards, so the forces are equal and the roof is not crushed.

7 0

3 years ago