Answer:
C. A spring is stretched.
Explanation:
Kinetic energy is the energy of motion, potential energy is stored energy. The motion of stretching the spring is kinetic, the energy it has before it's released is potential.
When a spring is stretched, it stores potential energy.
Explanation:The correct answer is C. A spring is stretched. This is an example of kinetic energy being converted to potential energy because when a spring is stretched, it stores potential energy. Kinetic energy refers to the energy of an object due to its motion, while potential energy is the energy that an object possesses due to its position or state.
In this example, when a spring is compressed or stretched, work is done to change its shape. As a result, potential energy is stored in the spring. When the spring is released, the potential energy is converted back into kinetic energy as the spring returns to its original shape and moves.
This conversion between kinetic energy and potential energy is a fundamental concept in physics and can be observed in various everyday examples such as stretched springs, raised objects, or compressed gas.
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A ball rolls horizontally off a bookshelf of height 1.7 m with a speed of 2 m/s
How long does it take the ball to reach the ground?
O A. 1.25
O B. 0.595
OC. 0.85
O D. 0.33 s
Answer:
0.59s
Explanation:
A p e x
A ball rolls horizontally off a bookshelf at a height of 1.7 m with a speed of 2 m/s then it takes 0.59 seconds. Hence, option B is correct.
What is acceleration?Acceleration is the rate at which the direction and speed of motion evolve over time. Anything was shown to be accelerated when it goes straighter and faster or slower. Motion on a circle therefore accelerates even though the speed is constant, so because direction is always changing. All those other types of movement experience an acceleration as a result of these factors.
It is a vector quantity because acceleration includes both a magnitude and a direction. The other vector quantity is velocity.
Use the equation of motion,
s = ut + 1/2 at²
1.7 = 2 (t) +1/2(-9.8)t²
t = 0.59 seconds.
Therefore, the time will be equal to 0.59 seconds. So option B is the correct one.
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For light waves, the frequency determines the color we see. The highest frequencies of light are at the _______end of the visible spectrum; the lowest frequencies appear at the ______ end of this spectrum. *
4 points
green, yellow
blue, red
yellow, green
red, blue
Answer: Blue, Red
Explanation:
The highest frequencies of light are at the Blue end of the visible spectrum. The blue end of the visible have short wavelengths.
While the lowest frequencies of light can be found in the Red end of the visible spectrum . They are known to have long wavelengths.
Kinetic Energy - What does it depend on?
The greater the ______________ of a moving object, the _____________________ it has.
Help!
Answer:
faster; more kinetic energy
Explanation:
How fast is wave moving if its wavelength is 3m and its frequency is 6 Hz?
The speed of the wave is 18[tex]\frac{m}{s}[/tex].
Explanation:
Given : FREQUENCY (F) = 6Hz
WAVELENGTH(λ) = 3m
If a wave has frequency, f, of 6 Hz, its period, T, is [tex]\frac{1}{6}[/tex] s. The wavelength, λ , is 3 meters. That means that in the time of one period, the wave travels 3 m.
That means that in the time of one period, the wave travels 3 m.
In General ,
speed =[tex]\frac{distance}{time}[/tex]
In applying this general definition of speed↑to a wave, we have
speed of the wave=wavelength period
Note: we generally use v for speed of a wave. Using the variable names, then that last formula is written
v=λ ×T
so speed of the wave = 3× 6 =18[tex]\frac{m}{s}[/tex]
Electromagnetic waves do require a medium to travel.
True
False
Answer:
The Answer is false
Explanation:
Electromagnetic waves differ from mechanical waves in that they do not require a medium to propagate. This means that electromagnetic waves can travel not only through air and solid materials, but also through the vacuum of space.
Answer:
false
Explanation:
The ray diagram shows a candle that is placed between
the focal point and the mirror.
Which best describes the image that will be produced
compared with the object?
It will be smaller and upright.
It will be smaller and inverted,
It will be larger and upright.
It will be larger and inverted,
Fy
Object
Answer:
C Large and UPright
Explanation:
have fun
Answer:
it is C
large and upright
Explanation:
i got it right
List at least five examples of minerals and their common uses.
Answer:
Beryllium
Beryllium is an alkaline metallic element that is highly toxic. It is known for its sugary sweet taste and some of its common uses are in X-rays and fluorescent lights.
Beryllium : A very thorough and technical site about this mineral.
Chromite
Chromite is the ore of chromium and is a very hard metal, and diamond is the only thing harder. This hardness is what allows a chrome finish to take a high polish.
Chromite : This site talks about its history and characteristics.
Cobalt
Cobalt is famous for the incredible blue color it imparts to glass and pigment. It has been found in meteorites and is used in invisible ink. It is a brittle metal and resembles iron.
Cobalt : This site has photos, video, charts and physical and atomic descriptions.
Columbite-tantalite
Columbite-tantalite group is a mineral used widely in technology. Electronics, automotive systems and health products like the pacemaker need this mineral to operate. It is mined in Africa and has earned the name of Coltan over the last few years.
Columbite-tantalite : Information about its role in the world under the name 'Coltan'.
Copper
Copper is a common metal throughout the world. It is used for currency, jewelry, plumbing and to conduct electricity. It is a soft, orange-red metal.
Copper : This site talks about its properties, uses and makeup.
Explanation:
Hope that helps :)
Light travels faster through water (n = 1.33) than it does through glass
(n = 1.5).
O
A. True
O
B. False
Answer:
true
Explanation:
A. True
What is refractive Index?Refractive Index is calculated from the ratio of the speed of light in a vacuum to that in a second medium of greater density.
The equation is n=c/v.
In water, the refractive index is 1.3 and in glass, it is 1.5.
Therefore,
Light travels faster through water, than it travels through glass.
As the refractive index of the medium increases, the speed of light in the medium decreases.
The refractive index of glass is higher than air, so the speed of light will be slower in glass and faster in air.
Some charged particles can move faster than in water and therefore travel faster than light.
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What property of a wave determines its pitch?
A.
the medium
B.
the amplitude
C.
the rarefaction
D.
the frequency
which electromagnetic waves have the highest energy?
A) gamma rays
B) light waves
C) radio waves
D) X-rays
Answer:
Gamma ways
Explanation:
The shortest wavelengths,AND the highest frequencies
In western states, many homes generate electricity from windmills. in a particular home, a young boy is using electricity to run a toy electric train. name 2 transformations.
Answer: He could be using batteries or it is rechargeable