3 years ago

List five examples from daily life in which you see periodic motion caused by a spring or cord.

Physics

2 answers:

dmitriy555 [2]3 years ago

4 0

car suspension

guitar string

clips for hanging clothes

keyboards buttons

elevators

shusha [124]3 years ago

4 0

Couch

Bike suspension

Pogo stick

BB gun

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What are the primary differences between stars and planets

shusha [124]

Stars don't have moons and planets do

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3 years ago

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A bird uses 10 N of force to pull a worm out of the ground a distance of 3 inches. How much work did the bird do?

pochemuha

Answer:

The work done by the bird is 0.762 J

Explanation:

Given;

force applied by the bird, f = 10 N

distance the bird moved the worm, d = 3 inches = 0.0762 m

The work done by the bird is given by;

W = F x d

where;

W is the work done by the bird

d is the distance the bird moved the load

Substitute the given values and estimate the work done by the bird;

W = 10 x 0.0762

W = 0.762 J

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3 years ago

An object is placed to the left of a convex mirror, such that the object-to-image distance is 140 cm.

labwork [276]

Answer:

The focal length of the mirror is 52.5 cm.

Explanation:

Given that,

Object to Image distance d = 140 cm

Image distance v= 35 cm

We need to calculate the object distance

$u = d-v$

$u = 140-35=105\ cm$

We need to calculate the focal length

Using formula of mirror

$\dfrac{1}{f}=\dfrac{1}{u}+\dfrac{1}{v}$

Put the value into the formula

$\dfrac{1}{f}=\dfrac{1}{-105}+\dfrac{1}{35}$

$\dfrac{1}{f}=\dfrac{2}{105}$

$f=52.5\ cm$

Hence, The focal length of the mirror is 52.5 cm.

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3 years ago

Determine the accelerations that result when a 45 N net force is applied to 3kg object

svp [43]

Answer:

acceleration is 18

Explanation:

45N/3kg=18

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What is the density of a 15g block of metal with a volume of 2cm3?

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Answer:

density =mass/volume

Explanation:

density=15/2

density=7.5 g/cm³

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