A, the number of protons in the nucleus.
The atomic number tells us the amount of electrons and protons in an atom.
Answer:
a)V= - 1.11 m/s
b)V= 0.833 m/s
Explanation:
Given that
M (Mass of lumberjack)= 98 kg
Final velocity of lumberjack ,V₁= 3.3 m/s
m (Mass of log) = 290 kg
a)
There is no any external force that is why linear momentum will be conserved
Pi=Pf
initially both are at rest so Pi=0 ( P = m v)
Lets take speed of log is V
0= M V₁ + m V
V = - M V₁ / m
V= - 98 x 3.3 / 290
V= - 1.11 m/s
b)
Now again from linear momentum conservation
(m + M )V =M V₁
V= M V₁(m+M)
By putting the values
V= 98 x 3.3/ (98 + 290 )
V= 0.833 m/s
Answer: Sound Energy
Sound Energy
Explanation:The vibrations produced by the ringing bell causes waves of pressure that travel or propagate through the medium that is air. Sound energy is a form of mechanical energy that is generally associated with the motion and position of the ringing bell.
Answer:
In 1957 the Soviet union launched Sputnik , the first satellite in space...
Answer: N = Mgcos(theta)
Therefore, the Normal reaction force is equal to Mgcos(theta)
Explanation:
See attached for a sketch.
From the attachment.
.
N = normal reaction force on block
W = weight of the block
theta = angle of the inclined plane to the horizontal
From the sketch, we can see that
N is equal in magnitude but opposite direction to Wy
N = Wy
And
Wy = Wcos(theta)
Wx = Wsin(theta)
Then,
N = Wy = Wcos(theta)
But W = mass × acceleration due to gravity = mg
N = Mgcos(theta)
Therefore, the Normal reaction force is equal to Mgcos(theta)
