Answer:
The person's ear canal length is 2.91 cm.
Explanation:
Given that,
Frequency = 3000 Hz
Temperature = 30°C
We need to calculate the speed
Using equation of sound wave with temperature
[texs]v(t)=331+0.6\times T[/tex]
Put the value of T


We need to calculate the length
Using formula of closed organ pipe


Where, L = length
v = velocity
f = frequency
Put the value into the formula




Hence, The person's ear canal length is 2.91 cm.
Answer:
A
Explanation: This is the correct answer
Arguably, far more dangerous. Whilst the initial stimulating effects of cocaine (it does this by blocking the reuptake of dopamine by the transporter proteins) giving the user a sense of self confidence and euphoria can result in rash and impulsive decisions leading to problems - the real issues with it lie in the tolerance that results.
your brain always wants to keep neurotransmitter levels stable, so when the dopamine levels skyrocket because their reuptake is blocked, the brain responds by reducing dopamine synthesis and the number of receptors, meaning without cocaine, your dopamine levels drop to below the norm.
Withdrawal symptoms are the complete opposite, leading to a dependency on the drug which causes far more damage than the effects of the drug itself.
Answer:
16.125 Pa
Explanation:
The Bernoulli equation despising the height changes is:

The gravity constant can be cancelled.
Applying the equation to the first situation,
,
, 
The density 'p' may be calculated because it is the only unknown.

Applying the equation to the second situation, where the only unknown is the pressure drop (
):


In both cases the assumption is
because its supposed that the air is stored.
Answer:
Explanation:
Given
initial velocity of particle u=274 m/s
one Particle moves up with velocity of v=235 m/s
and other moves u=484 m/s towards east
let
and
be the velocity of third Particle is Y and x direction
conserving momentum in y direction


Now conserving momentum in x direction


Net Velocity of third Particle


