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Aleksandr-060686 [28]
3 years ago
13

An elevator is being pulled up from the ground floor to the third floor by a cable. The cable is exerting 4500 newtons of force

on the elevator. According to Newton's law of action-reaction, what is the gravitational force on the elevator, in newtons, if the elevator is NOT accelerating?
Physics
1 answer:
Delicious77 [7]3 years ago
3 0

Answer:

The gravitational force on the elevator = 4500N

Explanation:

The given parameters are;

The force applied by the elevator, F  = 4500 N

The acceleration of the elevator = Not accelerating

From Newton's third law of motion, the action of the cable force is equal to the reaction of the gravitational force on the elevator which is the weight, W and motion of the elevator as follows;

F = W + Mass of elevator × Acceleration of elevator

∴ F = W + Mass of elevator × 0 = W

F = 4500 N = W

The net force on the elevator is F - W = 0

The gravitational force on the elevator = W = 4500N.

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In the Zeeman effect, the energy levels of hydrogen are split by a magnetic field. Each state with a different value of mlml has
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Answer:

the Zeeman effect without spin is three lines

Explanation:

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Therefore we only take into account the orbital moments (m_l) of the transition, from the selection rules of the refreshed harmonics, only the transition with

             \Delta m_l = 0, ± 1

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Let's analyze for the case of the Hydrogen atom

For a transition between levels n = 1 and n = 2 the values ​​of m_l are n_f = 1 m_l = 0 and for n₀ = 2  m_l = 0, 1

so we only have two lines.

For transition n_f = 2 and n₀ = 3

n_f = 2    m_l = 0, 1

n₀ = 3      m_l = -1, 0, 1

There are only two lines plus the central line, so there are three spectral lines

for n_f = 3 and n_o = 4

n_f = 3   ml = -1, 0, 1

n₀= 4      ml = -2, -1, 0, 1, 2

Only transitions with  Δm_l = ±1 are allowed, so there are only two transitions plus the central transition (Δm_l = 0), so there are only 3 spectral lines.

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when two object P and Q are supplied with the same quantity of heat, the temperature change in P is observed to be twice that of
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<h2>When two object P and Q are supplied with the same quantity of heat, the temperature change in P is observed to be twice that of Q. The mass of P is half that of Q. The ratio of the specific heat capacity of P to Q​</h2>

Explanation:

Specific heat capacity

It is defined as amount of heat required to raise the temperature of a substance by one degree celsius .

It is given as :

Heat absorbed = mass of substance x specific heat capacity x rise in temperature

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In above question , it is given :

For Q

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For another quantity : P

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so, C₂/C₁= 1/1

so, the ratio is 1: 1

8 0
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