Mass is the amount of matter in a material while weight is a measure of how the force of gravity acts upon the mass.
The focal point of a concave mirror is halfway along the radius, therefore the radius would be 2•16= 32 cm
Work= force x distance
work= 750 x 2
work =1500
power =work/time
power= 1500/ 0.3
power= 5000W
answer: b. 5000W
The most common value for the speed of light is 3*10^8 meters/second.
A more accurate number is <span>299 792 458 m/second, but that number is hardly ever used.</span>
