Acar travels from stop a to stop b with a speed of 30 km/h and then returns back to a with a speed of 50 km/h. find
(i) displacement of the car.
(ii) distance travelled by the car.
(iii) average speed of the car.

If the wheels lock when braking suddenly the vehicle: a: loses traction b: lose steering wheel ability c: gain speed slightly d: gain steering ability

Because air contracts as it cools, the air pressure inside a freezer is typically lower than on the outside. why do ice cubes inside a freezer tend to shrink over time? a. the ice dissolves oxygen from the air, forming a denser crystalline matrix.b. the ice reacts chemically with carbon dioxide in the air, forming gaseous carbon compounds.c. the ice melts, and then the liquid freezes as ice crystals on the bottom of the freezer.d. the ice sublimes, and then the water vapor deposits as ice crystals on the sides of the freezer.

What is the role of the water cycle in maintaining freshwater levels in lake and rivers?