Answer:
15.3 sorry if i got it wrong
Explanation:
Answer:
P = E / t definition of power is energy / unit time
1 W = 1 Joule / sec definition of 1 Watt of power
E = 2.6E4 J/s * 30 s = 7.8E5 Joules = 780,000 Joules
Answer:
f = -60 cm, this means tha the focal point is on the same side as the side where the object is located.
Explanation:
let u be the distance from the lens to the object and u = -35 cm, v be the distance from the lens to the image and m is the magnification and m = -v/u and f is the focal point.
Answer:
Explanation:
Kinetic energy gained by alpha particle
= charge x potential difference
1/2 mv² = 3.2 x 10⁻¹⁹ x 3.45 x 10⁻³
.5 x 6.68 x 10⁻²⁷ V² = 11.04 x 10⁻²²
V² = 3.3 x 10⁵
V = 5.74 x 100
= 574 m / s
Mechanical energy is conserved in respect of A , C and D .
Part B
B , C, are unknown .