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g100num [7]
3 years ago
6

What picture of the electron is suggested by the quantum-mechanical model of the hydrogen atom? a. a raisin in pudding c. a plan

etary orbiting body b. a probability cloud d. a light quantum
Physics
1 answer:
Ivanshal [37]3 years ago
3 0
D. a light quantum this is the answer .
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On a cold day, a heat pump absorbs heat from the outside air at 14°F (−10°C) and transfers it into a home at a temperature of 86
Leto [7]

Answer:

6.575

Explanation:

T1 = 30C = 30 + 273 = 303 K

T2 = - 10 C = - 10 + 273 = 263 K

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k = 263 / (303 - 263) = 6.575

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Both AC and DC describe types of current flow in a circuit. In direct current (DC), the electric charge (current) only flows in one direction. Electric charge in alternating current (AC), on the other hand, changes direction periodically.

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2 years ago
Suppose that a person riding on the top of a freight car shines a searchlight beam in the direction in which the train is travel
Snezhnost [94]

Answer:

same

Explanation:

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Relativity , Velocity of the light beam is same in all frames of references

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In the inertial frame of reference , velocity  of the light beam  has its own value as : 3 x 10^8 m/s

(b) If the freight car is moving , the frame we can assumed as  Non -inertial frame of reference    

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6 0
3 years ago
An oscillating block - spring system has a mechanical energy of 1.10 j, and amplitude of 11.0 cm, and a maximum speed of 1.7 m/s
ioda
The total mechanical energy of the block-spring system is given by the sum of the potential energy and the kinetic energy of the block:
E=U+K= \frac{1}{2}kx^2 + \frac{1}{2}mv^2
where
k is the spring constant
x is the elongation/compression of the spring
m is the mass of the block
v is the speed of the block

At the point of maximum displacement of the spring, the velocity of the block is zero: v=0, so the kinetic energy is zero and the mechanical energy is just potential energy of the spring:
E= \frac{1}{2}kA^2 (1)
where we used x=A, the amplitude (which is the maximum displacement of the spring).
Since we know 
A = 11.0 cm= 0.11 m
E = 1.10 J
We can re-arrange (1) to find the spring constant:
k= \frac{2E}{A^2} = \frac{2 \cdot 1.10 J}{(0.11 m)^2}=181.8 N/m
3 0
2 years ago
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