\\Choose the answer that is most descriptive the Milky Way Galaxy.// A. Giant nebula's, star nurseries, gas clouds, binary stars.
B. Black holes, quasars, gamma rays, galaxy clusters.
C. 200-400 billion stars, 100,000 light years diameter, spiral arms.
D. Planets, stars, comets, asteroids, planet asteroids, moons.

An ambulance emits a frequency of 450 hz from its siren. what frequency is heard by a man as the ambulance moves toward him? less than 450 hz more than 450 hz 450 hz 0 hz

In the sport of parasailing, a person is attached to a rope being pulled by a boat while hanging from a parachute-like sail. a rider is towed at a constant speed by a rope that is at an angle of 15 ∘ from horizontal. the tension in the rope is 1900 n. the force of the sail on the rider is 30∘ from horizontal. what is the weight of the rider? express your answer with the appropriate units.

One object has a mass of 1 kg and another object has a mass of 3 kg. if the speeds are the same, which of the following is true about their kinetic energy?