Answer:
Elements are made up of only one type of atom. Each element has a unique chemical symbol. Elements can be identified by their atomic number.
Answer:
Explanation:
If an object is moving, it is said to have kinetic energy (KE). Potential energy (PE) is energy that is "stored" because of the position and/or arrangement of the object. The classic example of potential energy is to pick up a brick. When it's on the ground, the brick had a certain amount of energy.
Note: Complete Question:
The decibel scale is a logarithmic scale for measuring the sound intensity level. Because the decibel scale is logarithmic, it changes by an additive constant when the intensity as measured in W/m2 changes by a multiplicative factor. The number of decibels increases by 10 for a factor of 10 increase in intensity. The general formula for the sound intensity level, in decibels, corresponding to intensity I is
β=10log(II0)dB,
where I0 is a reference intensity. For sound waves, I0 is taken to be 10−12W/m2. Note that log refers to the logarithm to the base 10.
Part A
What is the sound intensity level β, in decibels, of a sound wave whose intensity is 10 times the reference intensity (i.e., I=10I0)?
Part B
What is the sound intensity level β, in decibels, of a sound wave whose intensity is 100 times the reference intensity (i.e. I=100I0)?
Express the sound intensity numerically to the nearest integer.
Concepts and reason
The concept required to solve this problem is decibel scale of sound intensity.
Use the formula of sound intensity level in decibels and substitute the value of intensity to calculate decibels for all the parts.
Answer:
Find the given 2 attachments for complete solution. Thanks
The energy change taking place in the clock is the electrical energy to the mechanical energy to the light energy.
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- The alarm clock will work in the battery in the form of electrical energy. Then due to the current passed the electric motor rotates the blade.
- Then the energy is converted into mechanical energy.
- Then the mechanical energy generates the light and When it is plugged into a wall outlet, the alarm clock lights up with a time display.
- This is the energy transformation taking place in the alarm clock.
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Answer:
a.
b. Δ
c.
Explanation:
a).
Momentum conserved
b).
Δ
Δ
c).
d).
All of which has been lost as mechanical energy, and is now thermal energy warmer football players, noise a loud crunch for example.