Answer:
3 s.
Explanation:
Echo is defined as the repetition of a sound produced by the reflection of sound waves from an obstructing surface like a wall, mountain etc.
v = f*lambda
Where,
Lambda = wavelength of the wave
f = frequency of the wave = 1/t
v = velocity of the wave.
Distance there and back = initial ditance * 2
= 525 x 2
= 1050.
Time taken, t = lamda/velocity
= 1050 / 350
= 3 s.
So the delay is 3 seconds.
Concave mirror...as it focus the light at a given point..... concave mirror is converging !!!
Answer: 60 m/s
Explanation:
KE = 1/2mv^2
v = √ (2KE / m)
v = √ (2 x 36 J)/(0.02 kg)
v = √ 72 J/0.02 kg
v = √ 3600 m/s
v = 60 m/s
The speed of the electron when it is 10.0 cm from the +3.00 nC charge is 30× meters per second.
Given :
q=3.00 nC
r=distance=10 c.m
we apply formula
Velocity of electron =qd
=10××3=30× m/sec
The speed of electricity is determined by what you mean by the term "electricity." This is a broad term that essentially means "all things relating to electric charge." I'll presume we're talking about an electrical charge current moving through a metal wire, like the power cord of a light. Electrical currents passing through metal wires have three different velocities, all of which are physically significant:
The velocity of electron drift.
To more learn about speed of electron from the given link:
brainly.com/question/13130380
#SPJ9
Answer:
The magnitude of the electrostatic force that acts on each sphere is 1.027 N
Explanation:
Given;
distance of separation of the two spheres, r = 0.3 m
number of electrons on the spheres = 2 x 10¹³ e
charges on each sphere, q = 2 x 10¹³ x 1.602 x 10⁻¹⁹ C = 3.204 x 10⁻⁶ C
According to coulomb's law;
where;
F is the electrostatic force between the spheres
K is coulomb's constant = 9 x 10⁹ Nm²/c²
Therefore, the magnitude of the electrostatic force that acts on each sphere is 1.027 N