Area of land drained by a water system
Yes an object in motion has kinetic energy
Answer:
a) 
b) 
c) 
d) 
Explanation:
Given:
- velocity of the sound from the source,

- original frequency of sound from the source,

- speed of the source,

(a)
We know time period is inverse of frequency:
Mathematically:



(b)
Distance travelled by the motorcycle during one period of sound oscillation:



(c)
The distance travelled by the sound during the period of one oscillation is its wavelength.



(d)
observer frequency with respect to a stationary observer:
<u>According to the Doppler's effect:</u>
...........................(1)
where:
are the observed frequency and the velocity of observer respectively.
Here, observer is stationary.

Now, putting values in eq. (1)


Answer:
a = -8.912 m/s²
Explanation:
Given,
The initial velocity of the car, u = 28 m/s
The final velocity of the car, v = 0
The distance traveled by car, d = 88 m
The velocity displacement relation is given by the formula
v = d/t
∴ t = d/v
Substituting in the above values in the given equation
t = 88/28
= 3.142 s
The acceleration is given by the formula
a = (v-u)/t
= (0 - 28)/3.142
= -8.912 m/s²
The negative sign is that the car is decelerating.
Hence, acceleration a = -8.912 m/s²
There are 5 carbon atoms present in the Chemical formula,
.
<h3>What is a chemical formula?</h3>
A chemical formula is used to show the number and type of atoms present in a molecule, using the atomic symbols of the elements and numerical subscripts.
From the chemical formula;
We can deduce that we have the following elements and their corresponding number of atoms in one molecule of the compound;
Carbon = 1 atom
Hydrogen = 1 atom
Chlorine = 3 atoms
So, in 5 molecules of the compound;
Carbon = 1 x 5 = 5 atoms
Hydrogen = 1 x 5 = atoms
Chlorine = 3 x 5 atoms = 15 atoms
In conclusion, from the solution above, we can say that we have 5 atoms of carbon present in 5 molecules of
.
Learn more about chemical formula:brainly.com/question/26388921
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