Question
The speed of a boat in still water is 15 km/hr. It
covers (upstream) a distance of 64 km in 5 hours. The speed (in km/hr) of the stream isSolution
Upstream speed of boat = Distance/Time = 64/5 = 12.8 km/hr Therefore, speed of current = 15 – 12.8 = 2.2 km/hr
What is the primary cause of tides on Earth?
The primary reason that smoking cigarettes is bad for our health is that cigarette smoke _______.
Lamberts law is related to –
Two parallel wires of length 10 cm each are separated by a distance of 0.5 cm in a liquid. If the distance between them is increased by 2 mm, how much w...
What is the chemical formula of common salt?
Which of the following devices stores electrical energy in a magnetic field?
Tungsten is used for the construction of filament in an electric bulb because of its
`Short-sight' in human eye can be corrected by using proper –
A neutral atom has 9 electrons and mass number is 19. What is the number of neutrons in the atom?
_________ is a technique where the plants are grown with their roots suspended in the air.
