Answer:
Boron
Explanation:
(a)
H means hydrogen
The atomic mass of hydrogen is 1 and the mass number is 2.
Be means beryllium
The atomic number is 4 and the mass number is 9.
n mean neutron, atomic number is 0 and mass number 1.
By conserving the charge,
the atomic number of X = 1 + 4 - 0 = 5
the mass of X = 2 + 9 - 1 = 10
The element having atomic number 5 and mass number 10 is Boron (B).
During a phase change, the temperature remains constant. obviously all the heat is used in phase transformation.
Answer:
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Answer:
a. Speed = 1.6 m/s
b. Amplitude = 0.3 m
c. Speed = 1.6 m/s
Amplitude = 0.15 m
Explanation:
a.
The frequency of the wave must be equal to the reciprocal of the time taken by the boat to move from the highest point to the highest point again. This time will be twice the value of the time taken to travel from the highest point to the lowest point:
frequency =
= 0.25 Hz
The wavelength of the wave is the distance between consecutive crests of wave. Therefore,
Wavelength = 6.4 m
Now, the speed of the wave is given as:
Speed = (Frequency)(Wavelength)
Speed = (0.25 Hz)(6.4 m)
<u>Speed = 1.6 m/s</u>
<u></u>
b.
Amplitude is the distance between the mean position of the wave and the extreme position. Hence, it will be half the distance between the highest and lowest point:
Amplitude = (0.5)(0.6 m)
<u>Amplitude = 0.3 m</u>
<u></u>
c.
frequency =
= 0.25 Hz
Speed = (Frequency)(Wavelength)
Speed = (0.25 Hz)(6.4 m)
<u>Speed = 1.6 m/s</u>
<u></u>
Amplitude = (0.5)(0.3 m)
<u>Amplitude = 0.15 m</u>