Ask question

Ask question

All categories

-Dominant- [34]

3 years ago

12

Define the moment of a force

1 answer:

Lelu [443]3 years ago

5 0

The moment of a force can be described by a force applied to the end of an object whose other end is attached to a pivot or hinge, the force will tend to rotate the object about the pivot and the force have a turning effect.

You might be interested in

. How does a simple cell work????

Delvig [45]

A simple cell can be made by connecting two different metals in contact with an electrolyte. A number of cells can be connected in series to make a battery , which has a higher voltage than a single cell. In non-rechargeable cells, eg alkaline cells, a voltage is produced until one of the reactants is used up

5 0

3 years ago

Suppose a single electron orbits about a nucleus containing two protons (+2e), as would be the case for a helium atom from which

notka56 [123]

Answer:

$a=5.66*10^{23} \frac{m}{s^2}$

Explanation:

In this case we will use the Bohr Atomic model.

We have that: $F=m*a$

We can calculate the centripetal force using the coulomb formula that states:

$F=k*\frac{q*q'}{r^2}$

Where K= $9*10^9 \frac{Nm^2}{C}$

and r is the distance.

Now we can say:

$m*a=k*\frac{q*q'}{r^2}$

The mass of the electron is = $9.1*10^{-31}$ Kg

The charge magnitud of an electron and proton are= $1.6*10^{-19}C$

Substituting what we have:

$[tex]a=\frac{9*10^{9}*(1.6*10^{-19} )*(2(1.6*10^{-19} ))}{9.1*10^{-31}*(2.99*10^{-11})^2 }$ [/tex]

so:

$a=5.66*10^{23} \frac{m}{s^2}$

3 0

3 years ago

A 15,000 kg rocket traveling at +230 m/s turns on its engines. Over a 6.0 s period it burns 1,000 kg of fuel. An observer on the

lesya692 [45]

Answer:

a) $v = 312.791\,\frac{m}{s}$ , b) $a = 13.333\,\frac{m}{s^{2}}$

Explanation:

The problem is asking the rocket velocity and acceleration at t = 6 s.

a) The general equation of the rocket is:

$v=v_{o} -v_{ex}\cdot \ln \frac{m}{m_{o}}$

$v = 230\,\frac{m}{s}-(1200\,\frac{m}{s} )\cdot \ln \frac{14000\,kg}{15000\,kg}$

$v = 312.791\,\frac{m}{s}$

b) The acceleration experimented by the rocket is:

$a = \frac{v_{ex}}{m_{o}}\cdot \frac{dm}{dt}$

$a = \frac{1200\,\frac{m}{s} }{15000\,kg}\cdot \frac{1000\,kg}{6\,s}$

$a = 13.333\,\frac{m}{s^{2}}$

3 0

4 years ago

Read 2 more answers

When you don't have enough room to stop, you may _______ to avoid what's in front of you.

xxMikexx [17]

Do you have the options? I would say swerve?

7 0

3 years ago

Read 2 more answers

What rapid changes to earths surface are caused by shifting plates

PtichkaEL [24]

I am not sure if this is the answer you are looking for but a earthquake occurs when the plates shift.
Hope this helped.

4 0

3 years ago