PHYSICS HIGH SCHOOL

A 2.0 m tall object is 12.0 m from a convex lens that has a 4.0m focal length. Determine the image size and distance from the
lens.?

Answers

Answer 1
Answer: Great question! To determine the image size and distance from the lens, we can use the lens formula:

1/f = 1/v - 1/u

where f is the focal length of the lens, v is the image distance, and u is the object distance.

Given that the focal length (f) is 4.0 m and the object distance (u) is 12.0 m, we can substitute these values into the formula:

1/4 = 1/v - 1/12

To solve for v, we need to rearrange the equation:

1/v = 1/4 + 1/12

1/v = (3 + 1)/12

1/v = 4/12

1/v = 1/3

Now, we can find the value of v by taking the reciprocal of both sides:

v = 3 meters

So, the image distance (v) is 3 meters.

To find the image size, we can use the magnification formula:

magnification (m) = -v/u

Given that the object height (h) is 2.0 meters, we can substitute these values into the formula:

m = -v/u = -3/12 = -1/4

The negative sign indicates that the image is inverted. The magnification value of -1/4 means that the image is one-fourth the size of the object.

Therefore, the image size is 1/4 of the object's height, which is 1/4 * 2.0 = 0.5 meters.

So, the image size is 0.5 meters and the image distance is 3 meters from the convex lens.

I hope this explanation helps! Let me know if you have any further questions.

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Displacement is distance combined with

Answers

Its combined with direction.

It is proposed that future space stations create an artificial gravity by rotating. Suppose a space station is constructed as a 1600-m-diameter cylinder that rotates about its axis. The inside surface is the deck of the space station. What rotation period will provide "normal"gravity?

Answers

The rotation period that will provide normal gravity will be 57.12 seconds.

From the information given, the diameter of the cylinder is 1600m. Therefore, the radius will be:

= Diameter / 2.

= 1600 / 2

= 800m

Acceleration due to gravity = 9.8m/s²

Since a = rw², we'll use the subject of the formula to find w and this will be:

w = √g/✓r

w = ✓9.8 / √800

w = 0.11 rad/s

Therefore, the rotation period will be:

T = 2π/w

T = 2π/0.11

T = (2 × 3.142) / 0.11

T = 57.12 seconds

In conclusion, the correct option is 57.12 seconds.

Read related link on:

brainly.com/question/13436796

Answer

given,

diameter of the cylinder = 1600 m

radius = 800 m                                  

acceleration due to gravity  = 9.8 m/s²

a = r ω²                                                  

\omega = \sqrt{(g)/(r)}

\omega = \sqrt{(9.8)/(800)}

\omega = 0.11\ rad/s      

we know time period                      

T = (2\pi )/(\omega )

T = (2\pi )/(0.11)

T = 57.12 s                              

What is the speed of a wave yhat has a frequency of 2.0Hz

Answers

You can't tell the speed of a wave from only its frequency.

You also need to know either the wavelength, or what substance
the wave is traveling through.

-- If you know the frequency AND wavelength, you can
calculate the speed.

-- If you know what substance the wave is traveling in, you can
probably determine its speed without knowing anything else about it.

Traditional explosives use the energy released by chemical reactions. Nuclear weapons use the energy released by nuclear reactions. Why are nuclear weapons much more destructive than traditional explosives? Question 16 options: A. Chemical reactions can release much more energy than nuclear reactions B. Chemical reactions always use more energy than they release Nuclear weapons always contain more chemicals than traditional explosive C. Chemical reactions always release more energy than they use D. Nuclear reactions can release much more energy than chemical reactions

Answers

I believe the correct answer from the choices listed above is option D. Nuclear weapons are much more destructive than traditional explosives because nuclear reactions can release much more energy than chemical reactions. Hope this answers the question.

Answer: The correct answer is option D.

Explanation:

Chemical reactions are defined as the reactions in which rearrangement of one or more substances gets converted to one or more different substances known as products. Energy is released in the reactions where energy of products is less than the energy of the reactants.

Nuclear reactions are the reactions in which atomic nucleus undergoes change and releases a huge amount of energy in the process. There are two types of nuclear reactions: Nuclear fusion and nuclear fission. Both the nuclear reactions releases a huge amount of energy.

From the given information above, we conclude that the correct option is Option D.

What is the power of 10 when 157,821 is written in scientific notation?

Answers

Answer: The power of 10 in the given value is 5.

Explanation:

Scientific notation is defined as the representation in which a number is expressed in the decimal form. That means always written in the power of 10 form. The decimal place is put after 1 digit.

We are given a numerical value of 157,821

Converting this into scientific notation, we get:

157,821=1.57821* 10^5

Hence, the power of 10 in the given numerical value is 5.
1.57821 * 10^5 
so answer is 5

A net force of 200 newtons is applied to a wagon for 3 seconds. This cause the wagons to undergo a change in momentum of ?

Answers

physics- damon, Monday, December 1, 2014 at 3:27 pm force =change in momentum\ change in time or m a if m is constant 

change in momentum/3=200

change in momentum =3*200 kg m/s
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