An object in the sky brightens suddenly, but shows no hydrogen lines in its spectrum. it is most likely a (n) :

Case 1: your car is moving toward the west and the driver presses down on the gas pedal. You feel yourself being pressed back against the seat. During this instant, which direction is the car accelerating?

What is the temperature of a gas in which the atoms are moving very, very slowly? Question 9 options: cold hot room temperature

If we know the force, the distance, and the time we can calculate only power. work and power. only work. neither work or power.

True or false? One reason gases are easy to compress is because their particles have higher energy.

Which of the following would be affected if a soaring eagle changed direction but remained at a constant speed? A. acceleration only B. velocity only C. acceleration and velocity D. neither acceleration or velocity

Ethan pushes a wooden box across a carpet floor then he pushes the same box across a smooth marble floor why does Ethan find it easier to push the box on the marble floor than carpet floor

Let's now apply our equations for the normal modes of open and closed pipes. On a day when the speed of sound is 345 m/s, the fundamental frequency of an open organ pipe is 690 Hz.

Suppose you are an observer standing on the Moon, looking back at Earth. If the moon is in the waxingquarter phase, what phase of the Earth would you see? A. waxing quarter B. full C. new D. waning quarter E. none; the Earth doesn't have phases

How many chromosomes will an elephant's sperm have?

Would the springs inside a bathroom scale be more compressed or less compressed if you weighed yourself in an elevator that was moving upward at constant velocity