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qaws [65]
4 years ago
10

It takes a ball 30 seconds to travel from point A to point B. What is the ball’s speed?

Physics
1 answer:
AlladinOne [14]4 years ago
3 0
Direction from A to B divided by time(30s)
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Two two advantages and hazards of nuclear reaction.
Oksi-84 [34.3K]

Answer:

advantage : 1) produce no polluting gases .

2)doesn't contribute to global warming .

disadvantage: 1)waste is radioactive and safe disposal is very difficult and expensive.

2)local thermal pollution from east water affects marine life

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Which statement describes a problem with the peer review process in scientific research?
AleksandrR [38]
Where are the statements?
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4 years ago
A 30 g particle is undergoing simple harmonic motion with an amplitude of 2.0 ✕ 10-3 m and a maximum acceleration of magnitude 8
KiRa [710]

Answer:

Explanation:

By using the Newton second law and the position equation for a simple harmonic motion we have

F=ma\\a_{max}=\omega^{2}A\\x=Acos(\omega t+ \phi)\\

where a is the acceleration, w is the angular frecuency and \phi is the phase constant. We can calculate w from the equation for the maximum acceleration

\omega=\sqrt{\frac{a_{max}}{A}}=\sqrt{\frac{8*10^{3}m/s^{2}}{2*10^{-3}}}=2000rad/s

(a).

F=ma=m\omega^{2}Acos(\omega t + \phi)\\F=(30*10^{-3}kg)(2*10^{-3}m)(2000\frac{rad}{s})^{2}cos(2000\frac{rad}{s} t - \frac{\pi}{2})=240N*cos(2000\frac{rad}{s} t - \frac{\pi}{2})

(b). T=\frac{2\pi}{\omega}=\frac{2\pi}{2000}=3.14*10^{-13} s

(c). v_{max}=A\omega=(2*10^{-3}m)(2000\frac{rad}{s})=4\frac{m}{s}

(d). The mecanical energy is the kinetic energy when the velocity is a maximum

E_{m}=E_{k}(v_{max})=\frac{mv_{max}^{2}}{2}=\frac{30*10^{-3}kg(4\frac{m}{s})^{2}}{2}=0.024J

3 0
4 years ago
Read 2 more answers
QUESTION 3
larisa [96]

Answer:

225 N

Explanation:

Force = Mass . Acceleration

F = 45 . 5

F = 225 N

6 0
3 years ago
A cyclist acceleration from 0m/s to 8m/s in 3second. what is his acceleration?​
umka2103 [35]

Answer:

2.66 m/s² .

Explanation:

Initial velocity , u = 0 m/s

Final Velocity , v = 8 m/s

Time Taken , t = 3 s

So , Acceleration = (v-u)/t = (8 m/s - 0 m/s) /3 sec . = 8/3 m/s² = 2.66 m/s²

4 0
3 years ago
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