Ask question

Ask question

All categories

Amiraneli [1.4K]

3 years ago

11

Which label identifies the statement: "Energy cannot be created or destroyed, but it can be converted or changed into different

forms. A. the law of energy transformation B. the law of conservation of matter C. the law of energy equilibrium D. the law of conservation of energy

1 answer:

podryga [215]3 years ago

7 0

D. The law of conservation of energy identifies the statement

You might be interested in

A) A real object 4.0 cm high stands 30.0 cm in front of a converging lens of focal length 23 cm. Find the image distance, the im

vfiekz [6]

Explanation:

Given that,

Height of object = 4.0 cm

Distance of the object u= -30.0 cm

Focal length = 23 cm

We need to calculate the image distance

Using lens's formula

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

Where, u = object distance

v = image distance

f = focal length

Put the value into the formula

$\dfrac{1}{v}-\dfrac{1}{-30}=\dfrac{1}{23}$

$\dfrac{1}{v}=\dfrac{1}{23}-\dfrac{1}{30}$

$\dfrac{1}{v}=\dfrac{7}{690}$

$v=98.57\ cm$

We need to calculate the height of the image

Using formula of height

$\dfrac{h'}{h}=\dfrac{-v}{u}$

Where, h' = height of image

h = height of object

$\dfrac{h'}{4}=\dfrac{-98.57}{-30}$

$h'=\dfrac{98.57\times4}{30}$

$h'=13.14\ cm$

The image is real and inverted.

(b). Now, object distance u = 13.0 cm

We need to calculate the image distance

Using lens's formula

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

Put the value into the formula

$\dfrac{1}{v}=\dfrac{1}{23}-\dfrac{1}{13.0}$

$\dfrac{1}{v}=-\dfrac{10}{299}$

$v=-29.9\ cm$

We need to calculate the height of the image

$\dfrac{h'}{4}=\dfrac{-(-29.9)}{-13.0}$

$h=-\dfrac{29.9\times4}{13.0}$

$h=-9.2\ cm$

The image is virtual and erect.

Hence, This is required solution.

6 0

3 years ago

Which part of and organism is preserved in cast and mold fossils

Lubov Fominskaja [6]

Answer:

bones

Explanation:

Bones are is preserved in cast and mold fossils.

Normally the other 'parts of the body' like muscles, ligaments, blood and organs are soft.

5 0

3 years ago

The moon has a smaller mass than the Earth. If you were able to travel to the moon your weight would

Lelu [443]

Answer:

for example, a person weighing 100kg when on the moon only has 38kg is not wrong because the scale is just a device to measure weight, not mass, people have taken advantage of gravity to measure the weight of objects, so I think Your actual weight doesn't change, what changes is gravity and acceleration

Explanation:

3 0

3 years ago

What is the momentum of an object that has a mass of 0.03 grams and a velocity of 1200 m/s2

ruslelena [56]

answer is 36

because the formulae of momentum is

mass×velocity

3 0

3 years ago

A bone has a mass of 5.97 grams and a volume of 3.00 cubic centimeters . Calculate its destiny

Anuta_ua [19.1K]

1.99 is the density because of d= m/v

7 0

3 years ago

Read 2 more answers