Astudent drove to the university from her home and noted that the odometer on her car increased by 13.0 km. the trip took 20.0 min. (a) what was her average speed in km/h? km/h (b) if the straight-line distance from her home to the university is 10.3 km in a direction 25.0° south of east, what was her average velocity in km/h? km/h (c) if she returned home by the same path 7 h 30 min after she left, what were her average speed and velocity in km/h for the entire trip? average speed km/h average velocity km/h

b. lifting dumbbell weight at 20-degree angle from the body after a 45-degree angle

answer;

d. are made mostly of liquid

explanation;

-the general   composition and structure planets includes; they have a thick gas and liquid layer covering a small,solid core. mostly the gases are hydrogen and helium atmosphere and layers of liquid hydrogen. for instance neptune and uranus are examples of the outer planets, they have a core covered by ice and ammonia.

-neptune's atmosphere is hydrogen and helium with a bit of methane so there is no oxygen to breath and the interior is made up of frozen water and ammonia with a rock and iron core. thus, there is no liquid water or solid surface to survive.

no. bullets are macro objects. wave nature is for light waves, extremely tiny particles. if a light particle was the size of your finger, the bullet would be the size of the universe. so basically, that huge difference in size makes the wave nature of matter insignificant.