Velocity and speed of a moving body become identical when it tends to move in a straight line.
Answer:
Few millimeter thick aluminium, water, wood, acrylic glass or plastic.
Explanation:
The materials that are best for protection against beta particles are few millimeter thickness of aluminium, but for the high energy beta-particles radiations the low atomic mass materials such as plastic, wood, water and acrylic glass can be used.
These materials can also be used in personal protective equipment which includes all the clothing that can be worn to prevent any injury or illness due to the exposure to radiation.
1) Vibrate Parallel to the direction of the wave's propagation
The given mass measurement contains some amount of uncertainty, this uncertainty is 0.2 g. Generally, (4.6 g±0.2 g) does not say that the “true” mass is in the interval 4.4 g to 4.8 g for sure. It means that the mass was measured with a precision of 0.2 g.
Thus, the mass measurement value of 4.6 g ± 0.2 g, describe the range of anywhere from 4.4 grams (4.6 - 0.2) to 4.8 grams (4.6 + 0.2).
Answer:
The the magnitude of the maximum velocity and acceleration are 16.93 m/s and
.
Explanation:
Given that,
Rate = 2940 rev/min
Amplitude = ±5.50 cm
(a). We need to calculate the magnitude of the maximum velocity
Using formula of maximum velocity
![v=A\times\omega](https://tex.z-dn.net/?f=v%3DA%5Ctimes%5Comega)
Where, A = amplitude
Put the value into the formula
![v=5.50\times10^{-2}\times2940\times\dfrac{2\pi}{60}](https://tex.z-dn.net/?f=v%3D5.50%5Ctimes10%5E%7B-2%7D%5Ctimes2940%5Ctimes%5Cdfrac%7B2%5Cpi%7D%7B60%7D)
![v=16.93\ m/s](https://tex.z-dn.net/?f=v%3D16.93%5C%20m%2Fs)
(b). We need to calculate the maximum acceleration
Using formula of maximum acceleration
![a=A\times\omega^2](https://tex.z-dn.net/?f=a%3DA%5Ctimes%5Comega%5E2)
![a=5.50\times10^{-2}\times(2940\times\dfrac{2\pi}{60})^2](https://tex.z-dn.net/?f=a%3D5.50%5Ctimes10%5E%7B-2%7D%5Ctimes%282940%5Ctimes%5Cdfrac%7B2%5Cpi%7D%7B60%7D%29%5E2)
![a=5.213\times10^{3}\ m/s^2](https://tex.z-dn.net/?f=a%3D5.213%5Ctimes10%5E%7B3%7D%5C%20m%2Fs%5E2)
Hence, The the magnitude of the maximum velocity and acceleration are 16.93 m/s and
.