A truck is releasing sand on to the road to help melt the ice. The truck maintains a constant velocity of 15 m/s but over time the mass of the truck changes as shown in the data table below: What is the maximum momentum of the truck according to the data above? * Captionless Image
180,000 kg·m/s
52,500 kg·m/s
150,000 kg·m/s
250,000 kg·m/s

blue light is scattered in different directions by the tiny molecules of air. blue is scattered more than other colours because it has a shorter distance to travel which results in smaller waves. this is why we see a blue sky most of the time.

the answer is the first electromagnet (a). this is because it has more coils around the ferromagnetic material. increasing the number of coils increases the surface area in which the metal interacts with the current in the coil. this enables more atoms in the metal to become aligned hence becoming more magnetized.