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faltersainse [42]
3 years ago
9

THIS IS URGENT

Chemistry
2 answers:
vivado [14]3 years ago
6 0

Answer: A. wavelength

Explanation:

Wavelength is the distance between the two consecutive crests or troughs.

Frequency is the number of  vibrations in one second. It is also defined as the number of crests that pass a point in a given time.

Amplitude is the maximum extent of a vibration or oscillation measured from the position of equilibrium.

Loudness is the perception by an individual of how intense the sound is.

Therefore, the correct answer is wavelength.

strojnjashka [21]3 years ago
3 0
A. wavelength

wavelength is the distance between 2 crests of a wave
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What is the mass of a sample of iron that has had 300.0 j applied to it and heats up from 20.0 degrees Celsius to 40.0 degrees C
yuradex [85]

Answer:

The mass of a sample of iron that has had 300 J applied to it and heats up from 20 degrees Celsius to 40 degrees Celsius is 32.61 grams.

Explanation:

Calorimetry is the measurement and calculation of the measurement of heat changes exchanged by a body or a system produced in physical and chemical processes.

The sensible heat of a body is the amount of heat received or transferred by a body to produce a change in temperature but without a change in physical state.

The sensible heat in a constant pressure is calculated by:

Q = c * m * ΔT

where Q is the heat exchanged by a body of mass m, constituted by a substance of specific heat c, and where ΔT is the temperature variation (ΔT=Tfinal - Tinitial)

In this case:

  • Q= 300 J
  • c= 0.46 \frac{J}{g*C}
  • m= ?
  • Tfinal= 40 C
  • Tinitial= 20 C

Replacing:

300 J= 0.46 \frac{J}{g*C} * m* (40 - 20) C

Solving:

300 J= 0.46 \frac{J}{g*C} * m* 20 C

m=\frac{300 J}{0.46 \frac{J}{g*C} * 20 C}

m= 32.61 g

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2 years ago
Which of the following measurements is equal to 2,300 dL
kolbaska11 [484]
230,000. and that weird u
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A measure of the kinetic energy of particle motion within a substance is _____.
Irina18 [472]

All particles (atoms and molecules) of matter have kinetic energy because they are always in motion.

A measure of the kinetic energy of particle motion within a substance is temperature. If the particles move faster, they have more kinetic energy, and the substance has a higher temperature


5 0
3 years ago
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Annie has a soccer ball and a kickball she kicks each ball with the same force the soccer ball accelerates at 3 m/s to the secon
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Answer:

Because of less weight kick ball has more acceleration.

Explanation:

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Acceleration of soccer ball:

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According to newton's second law the acceleration of object depends upon two variables.

1) Mass of object

2) Force acting on it

Mathematical expression:

a = f/m

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f = force

m = mass

The force on balls are same thus the acceleration is depend upon the masses of balls.

The soccer ball has more weight that's why its acceleration is less while kick ball is lighter and thus its acceleration will more.

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Find the maximum mass of MgO that can be made from 2.4 of Mg and 2.4 of O2
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