Answer:
Beat frequency is determined by the number of beats per second one hears from the sound. It can also be determined by taking the difference in frequency of the two notes that interfere to produce the beat.
Explanation:
Beat frequency is determined by the number of beats per second one hears from the sound.
Assuming the sound pulses is coming from two tuning forks;
- Frequency of the first tuning fork (F₁) is known as 240Hz
- Frequency of the second tuning fork (F₂) is not known
- there are 8 beats in 2 seconds
Beat Frequency = number of beats/time
Beat Frequency = 8/2 = 4Hz
Beat Frequency = F₂ - F₁
±4 = F₂ - 240
4 = F₂ - 240
4+240 = F₂
244 = F₂
F₂ = 244 Hz
-4 = F₂ - 240
-4 + 240 = F₂
F₂ = 236 Hz
The percentage uncertainty in the beat frequency is
4 /240 = 0.0167 = 1.67%
To reduce the percentage uncertainty in the beat frequency
A tuning fork of almost the same frequency as the first tuning fork are used to produce sound pulses, let's say the frequency of the second tuning fork is 241 Hz.
The beat frequency = 241Hz -240Hz = I Hz
Then, the percentage uncertainty = 1/240 = 0.00416 =0.416%
Angle = 5°
Acceleration = a = g x Sin(θ) where g = 9.8m/s² <span>= 9.8*Sin(6) = 0.854 m/s</span>²<span> , <span>
As coasting comes to a stop:
v = a x t = 0
t = v/a = 34/0.854 = 39.8 seconds
The distance traveled is:
d = (vf-vi)t - (1/2)at</span></span>²<span><span> = 34 x 39.8 - (1/2)(0.854)(39.8)</span></span>²<span><span> =
1353.2 -676.4
</span></span>
<span>= 676.8 m</span>
1 kilo-calorie= 4184 joules
0.001 kilo-calorie= 1 calorie
therefore 5.25 calorie=21.966 joules
Answer:
The property to form polar covalent bond and hydrogen bonds
Explanation:
Liquid water exhibits the property of surface tension, functions as solvent for ionic and polar covalent bonded molecules and have high specific heat.
All these properties can be credited to the property of water to form hydrogen bonds with liquid water molecules where the hydrogen bonding results when hydrogen atom of a water molecule is attracted to a more electro negative oxygen atom of other water molecule in the neighborhood while polar covalent bond formation results in the the water molecule as it is a polar covalent molecule as it contains hydrogen atom and an electronegative oxygen atom which results in the charge distribution in the molecule.
