Answer:
Hydrogen
Explanation:
(H) atom does not have any neutrons in it's tiny nucleus.
Answer:
it yields a derived unit known as Newton, which is the unit of Force.
Explanation:
The formula for force is given by Newton's Second Law, which states that whenever an unbalanced force is applied to a body, it produces an acceleration in the body in the direction of force.
where, F = Force
m = mass
a = acceleration
Now, we substitute the respective S.I units of each quantity in equation:
F = Newton (N)
m = kilogram (kg)
a = acceleration = m/s²
Therefore,
So, it is clear from above expression that:
<u>When kilogram is multiplied by meter per second squared, it yields a derived unit known as Newton, which is the unit of Force.</u>
Are there options to choose e
Let the mass of the person be m. Total momentum is conserved (because the exterior forces on the system are balanced), especially the component in the vertical direction.
Given that,
Mass of gallon is M
Let man mass be m
Velocity of man is v
Let velocity if ballot be Vb
When the person begin to move we have
Conservation of momentum
mv + MVb=0
MVb=-mv
Vb= -(m/M) v
Given that the mass of man is less than mass of balloon. i.e. m<M
So, if m<M, then, m/M <1
Therefore, .
Vb= -(m/M) v
Vb< -v
This implies that the velocity of balloon is less than the velocity of man and if is also moving in opposite direction
So the man is moving upward, then the balloon is moving downward and it's velocity is less than the velocity of man,
The answer is C
Down with a speed less than v
Answer:
a) λ = 4L, b) L_c = ½ Lₐ, c) f = 214 Hz
Explanation:
a) in this part, the fundamental frequency (1st harmonic) is requested
In a pipe, the side that is closed has a node and the open side has a belly, so the wavelength inside the pipe is ¼ of the wavelength.
λ = 4L
to find the frequency let's use the definition of velocity
v = λ f
f = v /λ
f = v / 4L
b) in this part let's start by finding the resonance for a tube open at both ends
λ = 2 L
f = v / 2L
since they ask for the same frequency, let's match the two expressions
v / 4L_c = v / 2Lₐ
L_c = ½ Lₐ
therefore the length of the closed tube must be half the length of the open tube
c) It is indicated that the length of the open tube is L = 80 cm = 0.80 m
the frequency is
f = v / 2L
f = 343/2 0.8
f = 214 Hz
