A dog with mass of 43 kg is running with a velocity of 2 m/s. What is its momentum? O 86 kgm/s
O 45 kgm/s
O 21.5 kgm/s
O 0.0465 kgm/s

so easy. just google the electromagnetic waves and it’ll pop up.

305.7

explanation:

density =m/v

density =917/3.00

density = 305.

approximately = 305.7

in four significant figures

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.

b. false

explanation:

suppose a rock in free fall is dropped off a cliff. after falling for 5 seconds, its speed would not be 100 m/s.