Electron is a fundamental Particle by JJ Thomson so it was truly difficult to say that electron is a negative charge
Answer:
Explanation:
frequency of vibration
n = 40 / 22.3 per second.
= 1.794 per second
velocity of wave v = 369 / 13.5 cm / s
= 27.33 cm / s
wavelength = velocity / frequency
= 27.33 / 1.794
= 15.23 cm
Answer:
the total energy before collision is 12.25J
the total energy after collision is tranfered to sound and heat (by the friction between the two clay balls)
Explanation:
first we should know the velocity of the 2 balls:
momentum=mass ×velocity
we have the momentum and the mass of the 2
so momentum ÷mass=velocity
clay ball 1 velocity=7 m/s & clay ball 2 velocity= -7 m/s
KE=1/2 mv²
1/2 ×0.25×7²=6.125J KE of ball 1
1/2 ×0.25×-7²=6.125J KE of ball 2
add them both we will have 12.25J which is before collision
this energy will then be tranfered to heat and sound as they stop after the collision(velocity =0m/s)