Answer:
The fraction of the ball's kinetic energy stored in the spring is 3.6KJoules
Explanation:
Given
Mass of ball =0.5kg
Velocity of ball =120m/s
The kinetic energy stored by the ball is expressed as
K.E=1/2(m*v²)
Substituting our data into the expression we have
K. E=(0.5*120²)/2
K. E=7200/2
K.E=3,600 JOULE
K.E=3.6KiloJoules
Answer:
The speed of sound in this gas is 409.6 m/s.
Explanation:
The length of the column changes from 20 cm from resonance to resonance. Thus,
The length change from one resonance to resonance. so, there is 1 loop change. So,
ΔL = 1 loop = λ/2
ΔL = 20 cm (given)
Also, 1 cm = 0.01 m
So,
ΔL = 0.2 cm (given)
The wavelength is:
λ = ΔL×2
λ = 2x0.2 = 0.4 m
Given:
Frequency (ν) = 1024 Hz
<u>Velocity of the sound in the gas = ν×λ = 1024×0.4 m/s = 409.6 m/s</u>
Answer: 1 tablet per day
Explanation:
Given:
Mass of vitamin B2 in the tablet = 3.00mg = 0.003g
Daily requirement = 0.0030g/day
To get proper amount of vitamin ( not too much or too low), the number of tablets to take per day is given as;
N = mass per tablet/daily requirement
N = 0.003g/0.003g/day
N = 1 tablet per day
Therefore, a person should use one tablet per day.