4.

Which one of the following quantities is a vector quantity? O the temperature of molten lava O the number of people on board an airplane O the mass of a watermelon O the age of the pyramids in Egypt O the sun's pull on the earthA vector is represented by an arrow. What is the significance of the length of the arrow? O The length of the arrow indicates its direction. O Short arrows represent accelerations and long arrows represent velocities. O There is no significance to the length of the arrow. O The length of the arrow is proportional to the magnitude of the vector. O Long arrows represent velocities and short arrows represent forces.Which one of the following situations involves a vector quantity? O The volume of the soft drink can is 0.360 liters. O The velocity of the rocket was 325 m/s, due east. O The mass of the Martian soil probe was 250 kg. O The light took approximately 500 s to travel from the sun to the earth. O The overnight low temperature in Toronto was -4.0"C