Explanation:
Density is defined as the ratio of the mass to the volume. The expression for density is:
The Si unit for density is kg/m³
The dimensional expression for density = [ML⁻³]
Specific volume is defined as the ration of the volume to the mass. It is the reciprocal of density.
The BG unit of specific volume is ft³ / lb.
Answer:
4.55 minute
Explanation:
51 km = 51000 m
the ray of light travels due east 51000 m , bounces back from reflecting mirrors . The reflected light gets focused on a point 135 m south . Let the angle between incident light and reflected light be θ.
tanθ = 135 / 51000
θ = .1516 degree
= .1516 x 60 minute
= 9.09 minute
angle between incident ray ( east - west ) and normal = 9.09 / 2
= 4.55 minute Ans
A chemical energy ➡️Kinetic energy ➡️Heat energy
White dwarfs, the energy will all be used and it will begin to shrink.
Explanation:
Visible light is the range of electromagnetic waves that humans can see. Anything that glows or gives off light makes waves of what we call visible light. The sun, light bulbs, candles and fire are all things that people automatically think of when it comes to light, but visible light comes from many sources and in many colors. Some other sources of visible light include: television and computer screens, glow sticks, and fireworks
