A student made a model of an onion skin cell she viewed using a microscope. The scale is 1:500. The students cell model has a length of 15cm. How many centimeters is the real cells length?

Astronomers have observed a small, massive object at the center of our Milky Way galaxy (see Section 13.8). A ring of material orbits this massive object; the ring has a diameter of about 15 light-years and an orbital speed of about 200 km>s.

Is the distance on a round-trip positive, negative, or zero?

A silver coin rubs vigorously against a wool cloth. The cloth becomes positively charged. Which statements are true? The silver coin lost electrons. The silver coin gained electrons. The wool cloth lost electrons. The wool cloth gained protons.

The primary matallic element that's added to stool to make stainless steel is

A 4,000-kg car traveling at 20 m/s hits a wall with a force of 80,000 N and comes to a stop. What was the impact time?

Explain the 3 factors that affect the Speed of Sound

How does surface air flow in a midlatitude cyclone in the northern hemisphere?

The frequency of a sound wave is commonly called

Lionel explores electromagnetic induction using the procedure shown. 1. Move the magnet quickly into the right end of a solenoid. 2. Hold the magnet in the solenoid for 3 s. 3. Move the solenoid slowly to the left away from the magnet.

What is a manager position