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3 years ago

14

Newton would agree that all objects on Earth exert a

1 answer:

VikaD [51]3 years ago

8 0

Answer:

pretty sure it's true....

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______ is most resistant to thermal energy transfers. a. copper wire b. aluminum foil c. water d. foam insulation

Reika [66]

Answer:

Water

Explanation:

Because it does not conduct much energy.

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4 years ago

What is the name for the layer of cells at the back of the eye that contains photoreceptors

valkas [14]

I believe this one is the retina...

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3 years ago

Read 2 more answers

A spaceship travels at a constant speed from earth to a planet orbiting another star. When the spacecraft arrives, 12 years have

tigry1 [53]

Answer:

$7.2878\times10^{16} m$

Explanation:

Time elapsed on Earth $d_{t}$ = 12 years

Time elapsed on board the ship $d_{t_o}$ = 9.2 years

now r= $\frac{d_{t} }{d_t_o}$ = 12/9.2= 1.3043

$v= c \sqrt{1-\frac{1}{r^2}}$

$v= 3\times10^8 \sqrt{1-\frac{1}{1.3043^2}}$

v= $1.9258\times10^8$

therefore distance L= $d_{t}\times v$

putting value we get

= $12\times\times1.9258\times10^8$

= $12\times\times365\times24\times3600\times1.9258\times10^8$

= $7.2878\times10^{16} m$

4 0

3 years ago

Newton's second law of motion states the relationship of mass, acceleration and force. It states that

sergey [27]

Answer:

C

Explanation:

force equals mass time acceleration

5 0

3 years ago

An object of mass 20g taken at a height of 2m above the ground. Which type of energy is possessed by the object at this height ?

In-s [12.5K]

<h3><u>Given</u> </h3>

Mass of an object is $\bf\red{20 g}$
Height of the body is $\bf\green{2 m}$

<h3><u>To Find</u></h3>

Value of the energy

<h3><u>Solution</u></h3>

${\purple {\underline{\boxed{\sf{ Potential\: Energy \:=\: mgh}}}}}$

Where,

$\sf\red{m}$ = Mass
$\sf\green{g}$ = Gravity
$\sf\blue{h}$ = Height

Now, Converting gram to kg

$\longrightarrow\:$ 1000g = 1kg

$\longrightarrow\:$ 20g = $\sf\dfrac{20}{1000}$

$\longrightarrow\:$ = 0.02 kg

According to the question

$\sf\red{Mass \:= \:0.02 kg}$

$\sf\green{Gravitational \;force \:= \;10 m/s^{2}}$

$\sf\purple{Height\: =\: 2 m}$

Putting these values

$\to\:$ Potential Energy = mgh

$\to\:$ Potential Energy = 0.02 × 10 × 2

$\to\:$ Potential Energy = 0.2 × 2

$\to\:$ Potential Energy = $\bf\pink{0.4\:joules}$

7 0

3 years ago