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3 years ago

What is the best explanation of work?

Physics

1 answer:

Margarita [4]3 years ago

3 0

Answer:

Work done by the force acting on a body is defined as the product of force and displacement of the body in the direction of the force.  It is a scalar quantity. Force acting on the body must produce a displacement for the work is to be done by the force. Thus, for the work to be done, the following conditions must be fulfilled:

A force must be applied and the applied force must produce a displacement in any direction except perpendicular to the direction of the force.

Mathematically,

$work = force \times \: displacement$

( in the direction of force)

i.e W= F•D

The SI unit of force is Newton (N) and that of displacement of a metre (M). So the unit of work is Newton metre(Nm) which is joule (J).

Thus, one joule work is said to be done when one Newton force displaces a body through one metre in its own direction.

Hope this helps...

Good luck on your assignment..

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3 years ago

Calculate the period and frequency of a 3.500 m long pendulum at the following locations:

igomit [66]

Answer:

The period of a simple pendulum is given by the formula:

$T=2\pi \sqrt{\frac{L}{g}}$

where

L is the length of the pendulum

g is the acceleration due to gravity

In this problem we have:

L = 3.50 m is the length of the pendulum

At the North Pole, we have

$g=9.832 m/s^2$

So the period is

$T=2\pi \sqrt{\frac{3.50}{9.832}}=3.749 s$

At Chicago, we have

$g=9.803 m/s^2$

So the period is

$T=2\pi \sqrt{\frac{3.50}{9.803}}=3.754 s$

At Jakarta, we have

$g=9.782 m/s^2$

So the period is

$T=2\pi \sqrt{\frac{3.50}{9.782}}=3.758 s$

The frequency of an object in simple harmonic motion is equal to the reciprocal of the period:

$f=\frac{1}{T}$

At the North Pole, we have

T = 3.749 s

So the frequency is

$f=\frac{1}{3.479}=0.267 Hz$

At Chicago, we have

T = 3.754 s

So the frequency is

$f=\frac{1}{3.754}=0.266 Hz$

At Jakarta, we have

T = 3.758 s

So the frequency is

$f=\frac{1}{3.758}=0.266 Hz$

5 0

4 years ago

Atoms can bond together in several different ways. Name three types of chemical bonding. Explain what happens to electrons in ea

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Answer:

Atom can bond together either by ionic bond, covalent bond, co-ordinate covalent bond.

Explanation:

a] The three types of chemical bonds are:

i) Ionic Bond

ii) Covalent Bond

iii) Co-ordinate Covalent Bond.

i) Ionic Bond: This bond happens between a metal and a non-metal due to electrostaic force which occur between two opposite charge ions. In this electron is given by electropositive atom to electronegative atom to gain positive charge. Eg: NaCl.

ii) Covalent Bond: Here, the electrons are shared among the two elements which can even be of the same species. Eg: Carbon-Carbon (C-C) covalent bond, N2.

iii) Co-ordinate Covalent Bond: It is a covalent bond between two atoms but unlike Covalent Bond, in this, the shared pair of electrons come from the same atom. Eg: The H+ in the NH4+ is attached to NH3 through a co-ordinate covalent bond.

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4 years ago

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3 years ago

A Carbon-10 nucleus has 6 protons and 4 neutrons. Through radioactive beta decay, it turns into a Boron-10 nucleus, with 5 proto

Gnom [1K]

Answer:

A : Positively charged.

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4 years ago

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