Explanation:
Submultiples Multiples
Value SI symbol Name
10−1 s ds decasecond
10−2 s cs hectosecond
10−3 s ms kilosecond
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Answer:
110.7 J
Explanation:
Hooke's law is represented by the formula:
F = ke where F is the force in Newton, K is force constant and e is extension in m
work done = 1/2ke² = 1/2 K ( e² - e₀²) and e₀ is the extension at relaxed length
e₀ =0
work done = 0.5 × 82N/m × (2.70 m)² = 110.7 J
For the given problem, the amount of work done expressed in ergs is 3200 ergs.
Answer: Option A
<u>Explanation:
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The work done on an objects are the force acting on it to move the object to a particular distance. So, work done on the object will be directly proportional to the force acting on it and the displacement.
Here, the force acting on the object is given as 0.010 N and the displacement of the object is 0.032 m. So, the work done on the object is
It is known that
So, the work done can be expressed in as,
It is known that , so the conversion of units from Nm to erg will be done as follows:
Thus, work done in ergs is 3200 ergs.
Answer:
The speed of the ball is 28.4m/s.
Explanation:
Given that the formula of speed is Speed = Distance/Time. So you have to substitute the values into the formula :
Let distance = 91m,
Let time = 3.2s,
Answer:
Explanation:
It is given that,
Charge of alpha particle,
Mass of the alpha particle,
Potential difference,
Magnetic field, B = 2.5 T
The α-particle moves perpendicular to the magnetic field at all times. The initial speed of the alpha particle is 0 as it is at rest. Using the conservation of energy as :
is the speed of the α–particle
So, the speed of alpha particle is . Hence, this is the required solution.