Answer:
I hope 2 amperes of current passes
Answer:
Explanation:
Intensity of sound = sound energy emitted by source / 4 π d² , where d is distance of the source .
A )
Intensity of sound at 1 m distance = 60 /4 π d²
d = 1 m
Intensity of sound at 1 m distance = 60 /(4 π 1²)
= 4.78 W m⁻² s⁻¹
B )
Intensity of sound at 1.5 m distance = 60 /4 π d²
d = 1.5 m
Intensity of sound at 1 m distance = 60 /(4 π 1.5²)
= 2.12 W m⁻² s⁻¹
C )
Intensity of sound due to 4 speakers at 1.5 m distance = 4 x 60 /4 π d²
d = 1.5 m
= 4 x 60 /(4 π 1.5²)
= 8.48 W m⁻² s⁻¹
D )
Intensity of sound due to .06 W speaker must be 10⁻¹² W s ⁻² . Let the distance be d .
.06 /4 π d² = 10⁻¹²
d² = .06 /4 π 10⁻¹²
d = 6.9 x 10⁴ m .
Impulse = (force) x (time the force is applied)
Impulse = (25 N) x (0.16 sec)
<em>Impulse = 4 Newton-seconds</em>
Answer:
1. Decrease
2. Decrease
3. Stay the same
Explanation:
1. The more predators there are that eat the prey(cricket/frog), the less prey there will be.
2. The more the pollution effects them negatively, the more the population will die off.
3. The decrease of food may kill the population, but the increase of food does not effect the birth rate of the population.
