As the water boils at a certain temperature, phase change happen without change in its temperature. The heat associated is called the latent heat of vaporization. We obtain the heat required by multiplying the mass of the water to the latent heat of vaporization.
Heat = 0.018 x <span>2.3 x 10000000 = 41400 J</span>
The vertical accelerations of the point a and point c are equal. because the vertical acceleration is due to the acceleration due to gravity. Acceleration due to gravity<span> may refer to: Gravitational acceleration, the acceleration caused by the gravitational attraction of massive bodies in general, which is equal to 9.8 m/s^2</span>
Answer:
Explanation:
To calculate the red shift you use the following formula:
\tetha: angle between the observer and the motion of the body
v: speed of the body
c: speed of light
for motion with angle 90° (transversal motion):
- A red dwarf moving away from Earth at 39.1 km/s :
- A yellow dwarf moving transversely at 15.1 km/s (angle = 90°):
- A red giant moving towards Earth at 23.3 km/s (angle = 0°):
- A blue dwarf moving away from Earth at 25.9 km/s
- A red dwarf moving transversely at 14.1 km/s
Work = N × m = 50 x 40 = 2000 J
Answer:
Option (c)
Explanation:
Convex lens forms both types of images.
When the object placed between focus and optical centre of the lens, the image formed is virtual.
When the object placed beyond focus then the image formed is real.
