Olga is given a pure substance that reflects light. she has a mallet and a heat source. she will know if she has a metal if she?

What's cross contamination

What science did the study of the night sky eventually become?

5. Electromagnetic radiation travels at a speed of 3.0 x 10^8 m/s. a) What is the wavelength of a radio wave that has a frequency of 3.5 x 10^5 Hz? b) What is the frequency of an X-ray that has a wavelength of 2.5 x 10^-10 m?

A person wearing rollerblades starts from rest and accelerates at a constant rate. She reaches a speed of 13 mph (5.18 m/s) exactly 18.0 s later. a. What is the magnitude of their average acceleration (in m/s2) ? b.

Two loudspeakers at an outdoor rock concert are located 3.8 meters apart. You are standing 17.1 meters from one of the speakers and 20.3 from the other.

Which is not a property of an electromagnetic wave? O It is made of magnetic fields It travels at the speed of light O It is made of electrical fields It carries energy only through matter

Explain why your weight would be less in the moon than on earth even though your mass would not change. Use the law of universal gravitation in your explanation.

ions are atoms or groups of atoms that have a positive or negative charge. which of the following statements is true of ions?

1. According to the nebular theory, the solar system formed from? A. accretion of protoplanets. B. a large, thin cloud of dust and gas. C. colliding planetesimals. D. all of the above 2.

What is the difference between tangential acceleration and centripetal acceleration?