A newspaper turns yellow in sunlight. Is this a physical or chemical change?
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Related Questions
Which force changes Earth's surface most slowly?A) earthquakeB) erosionC) volcanoD) landslide
What changes to landforms are caused by movements at transform boudaries
When the speed of the bottle is 2 m/s, the KE is _____ kg m2/s2. When the speed of the bottle is 3 m/s, the KE is _____ kg m2/s2. When the speed of the bottle is 4 m/s, the KE is _____ kg m2/s2. When the speed of the bottle is 5 m/s, the KE is _____ kg m2/s2.When the speed of the bottle is 6 m/s, the KE is _____ kg m2/s2.(it dident have the subject so i just picked something that deals with science)
Which of the following lists the Earth’s layers in order from hottest to coldest in temperature?A.outer core, mantle, inner core, crustB.crust, mantle, outer core, inner coreC.inner core, outer core, mantle, crustD.mantle, crust, inner core, outer core
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Answer:
The frequency of sound wave created by trumpet is 437.5Hz
Explanation:
Given
the speed of sound wave = 350 m
the wavelength of sound wave = 0.8 m
the frequency of sound wave = ?
All the waves have same relationship among wavelength, frequency and speed, which is given by the equation:
v = fλ, where
v is speed of the wave
f is frequency of the wave
λ is wavelength of the wave
therefore frequency of sound wave is given by
f = v/λ
= 350m/0.8m
= 437.5
= 437.5Hz (since 1 = 1 Hz (Hertz)
Hence the frequency of sound wave created by trumpet is 437.5Hz
Answer:
The frequency of sound wave created by trumpet is 437.5Hz
Explanation:
Given
the speed of sound wave = 350 m
the wavelength of sound wave = 0.8 m
the frequency of sound wave = ?
All the waves have same relationship among wavelength, frequency and speed, which is given by the equation:
v = fλ, where
v is speed of the wave
f is frequency of the wave
λ is wavelength of the wave
therefore frequency of sound wave is given by
f = v/λ
= 350m/0.8m
= 437.5
= 437.5Hz (since 1 = 1 Hz (Hertz)
Hence the frequency of sound wave created by trumpet is 437.5Hz
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Answer:
(a) 200.0628 N ; ( b) 4.08Kg
Explanation:
We know,
w = mg [here w= weight , m= mass , g= gravity]
now,
gravity on earth (g) =9.807 m/s²
mass of the spanner (m)=?
weight of the spanner on earth(w) = 40N
⇒ w = 40N
⇒m g =40N
⇒m = (40/g) Kg
⇒m= (40/9.807)Kg
∴m=4.08Kg
∴mass of the spanner on earth = 4.08Kg
We know,
Mass is the amount of matter in an object . Somass will remain same both on earth and jupiter.
So,
(b)The mass of the spanner on jupiter = 4.08Kg
Now,
The mass of the spanner on jupitar (m) = 4.08Kg
Gravity on jupiter (g*) = 5.g [5 times on earth]
= 5 . (9.807)m/s²
=49.035 m/s²
(a)
∴weight of the spanner on jupitar(w*) = m g*
=(4.08 x 49.035) N
=200.0628 N
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There you go again. Newton's 3rd Law says "for every action there is an EQUAL OPPOSITE reaction.".
EQUALand OPPOSITE
If THIS MUCH force pushes the bullet THAT way, then THE SAME amount of force pushes the rifle THIS way.
The bullet pushes backward on the rifle with the same amount of force as the rifle exerts on the bullet.
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The theory of evolution is that organisms evolve over time.
And what is the dependent variable for this experiment
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Answer:
Independent variable - temperature
Dependent variable - tablet dissolving affect.
Explanation:
The Independent variable in an experiment is characterized as the variable in the experiment that is not affected by a change in any other variable or factor. It could be changed or manipulated to observe its impact on the dependent variable. While a dependent variable is the one that is affected by any change in the independent variable.
In the given experiment, the 'temperature' is the independent variable as it can be controlled or manipulated to observe the effect in the dependent variable. The 'tablet dissolving effect' would be the dependent variable as it is directly affected by any change in the independent variable(the higher the temperature, the easier the tablet gets dissolved).