Yes echolocation is based on the use of sound and knowing where the sound comes from without having to look for it a lot of soldiers on the battle field need to know how to use echolocation so they can basically not die
Answer: 7.5m/s2
Explanation:
Force applied = 540 N of force.
mass = 72.0kg
acceleration on the skates = ?
Recall that Force is the product of mass of an object and the acceleration by which it moves.
Force = mass x acceleration
540N = 72.0kg x acceleration
Acceleration = 540N/72.0kg
= 7.5m/s2
according to conservation of momentum , in absence of external forces , the total momentum of system of the particles remain same both before and after collision.
momentum of colliding objects before collision = momentum of colliding objects after collision.
or
m1 v1i + m2 v2i = m2 v1f + m2 v2f
where m1 and m2 are the two colliding objects. v1i and v2i are their respective initial velocities before collision and v1f and v2f are their respective final velocities after collision.
hence the correct statement is
total momentum before the collision is equal to the momentum after collision.
The electric field for 20 cm is 8.09 MN/C
Length of the straight filament = (20cm) (1m/100cm) = 0.2
Electric field for the straight conductor = 
E = [2(8.99 × 10^9 N·m^2/C^2)(90.0 × 10^-6 C/m)] / 0.2 m
E = 8.09 MN/C
The electric field is directly radially inward, toward the filament.
Electric field is a force produced by a charge near its surroundings. This force is exerted on other charges when brought in the vicinity of this field. SI unit of electric field is N/C (Force/Charge).
Learn more about electric field here:
brainly.com/question/8971780
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The oil<span> always </span>floats<span> to the top because it is less dense than </span>water<span>. </span>Oil<span> and </span>water <span>don't mix because </span>water<span> molecules are more attracted to each other than to </span>oil <span>molecules. Detergent molecules are attracted to both </span>water<span> and </span>oil<span>.</span>
