Use of CNG for vehicles instead of petrol.
also the length of santa's bridge = 400 m
so total distance = 400 + 100 = 500 m = 500 / 1000 = 0.5 km
time = t = 30 seconds = 30 / 3600 = 0.0083 hours
speed of the train = ?
we know that,
speed = distance / time
speed = 0.5 / 0.0083
speed = 60.2 km/h
is the answer.
hopefully it .
the answer is (3). newton's discoveries of the laws of motion. according to definition, basic research, also called pure research or fundamental research.
it has the scientific objective to advance scientific theories for enhanced understanding or forecast of natural or other phenomena.
basic research is that research that offers the knowledge we don't have; it attempts to learn that aren't always straight applicable or beneficial closely.