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3 years ago

Can someone define 'work' for me please? I looked it up but there are a lot of different answers.

Physics

2 answers:

vekshin13 years ago

7 0

Answer:

Work- Activity involving mental or physical effort done in order to achieve a purpose or result.

Explanation:

This was the first definition from the dictionary on google :)

scZoUnD [109]3 years ago

6 0

Be engaged in physical or mental activity in order to achieve a result; do work. a task or tasks to be undertaken; something a person or thing has to do.

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A child rides a bicycle from rest, reaching a velocity of 3.8 m/s [E] after 4.7 s. What is the acceleration of the bicycle?

Maurinko [17]

Answer:

0.81 m/s^2

Explanation:

A child rides a bicycle from rest

The child reaches a velocity of 3.8m/s

The time is 4.7 secs

Therefore the acceleration can be calculated as follows

v= u + at

3.8= 0 + a(4.7)

3.8= 0 + 4.7a

3.8-0= 4.7a

3.8= 4.7a

a= 3.8/4.7

= 0.81 m/s^2

Hence the acceleration is 0.81 m/s^2

8 0

3 years ago

What is the sound intensity level in decibels? Use the usual reference level of I0 = 1.0×10−12 W/m2.

jek_recluse [69]

Answer:

L = 130 decibels

Explanation:

The computation of the sound intensity level in decibels is shown below:

According to the question, data provided is as follows

I = sound intensity = 10 W/m^2

I0 = reference level = $1 \times 10-12 W/m^2$

Now

Intensity level ( or Loudness)is

$L = log10 \frac{I}{10}$

$L = log10 \frac{10}{1\times 10^{-12}}$

$L = log10 \times 1013$

$= 13 \times 1 ( log10(10) = 1)$

Therefore

L = 13 bel

And as we know that

1 bel = 10 decibels

So,

The Sound intensity level is

L = 130 decibels

5 0

4 years ago

What is the Nearest Galaxy from the Milky Way

Vsevolod [243]

Answer:

the andromeda galaxy

Explanation:

hope it helps , pls mark me as brainliest

6 0

3 years ago

Read 2 more answers

Which type of cells in your eyes allows you to see the color violet?

BaLLatris [955]

The cones present on the retina are the cells that help you see the colors.....there are mainly three types....red blue and green, cones but they mix to generate different colours !

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3 years ago

A disk-shaped platform has a known rotational inertia ID. The platform is mounted on a fixed axle and rotates in a horizontal pl

Zarrin [17]

Answer:

Explanation:

The angular momentum of that same disk-sphere remains unchanged the very same way before and after the impact of the collision when the clay sphere adheres to the disk.

$\mathbf{I_w}$ = constant.

The overall value of such moment of inertia is now altered when the clay spherical sticks. Due to the inclusion of the clay sphere, the moment of inertia will essentially rise. As a result of this increase, the angular speed w decreases in value.

Recall that:

The Kinetic energy is given by:

$\mathbf{K = \dfrac{1}{2} Iw^2} \\ \\\mathbf{K = \dfrac{1}{2} lw*w}$

where;

$\mathbf{I_w}$ is constant and w reduces;

As a result, just after the collision, the system's total kinetic energy decreases.

5 0

3 years ago