Potential energy = (mass) x (gravity) x (height)
Divide each side by (G x H) : Mass = PE / (G x H)
PE = 6 joules
Gravity = 9.8 m/s
Height = 3 m
Mass = 6 / (9.8 x 3) =
6 / (29.4) = <em>0.204 kg</em>
(weighs about 2 newtons or 7.2 ounces on Earth)
Answer:
O speed of the object increases 9.8 m/s during each second
a = 9.8 m/s/s
The attraction force provides the electron's centripetal force.
<span>8.30^-8N = mrω² </span>
<span>ω² = 8.30^-8 / (9.11^-31 kg x 4.70^-11m) .. .. ω² = 1.94^33 (rad/s)² .. .. ω = 4.40^16 rad/s </span>
<span>f = ω/2π = 4.40^16 / 2π .. .. .. ►f = 7.0^15 Hz</span>
Answer:
The separation of the two slits is = 1.5 × m
Explanation:
Wave length = 630 nm = 0.63 mm
x = 35 mm
l = 2.8 m
Order of fringes (m) = 3
We know that the separation of the two slits is given by
Put all the values in above formula we get
d = 1.5 × m
Therefore the separation of the two slits is = 1.5 × m