According to the graph, what is the maximum age at which a 4000 Hz sound wave with an intensity of 20 dB would be heard?

55

60

65

70

Newton's first law describes the tendency calles

If an electrically neutral atom has 4 protons and 4 neutrons and it loses 2 electrons, what is its charge? A) positive 2 B) negative 2 C) neutral D) varies

Light from a lamp is shining on a surface. how can you increase the intensity of the light on the surface?

Which of the following confirms that gravitational mass and inertial mass are equivalent?

Why water is matter? what is the reason

In our physical world, by far, the most abundance free charge in the universe is the electron, which has a negative charge. What do we mean, then, when we say that the surface of an object is positively charged?

You're going camping and are thinking of carrying 3 gallons of water. How much does the water weigh, in units of pounds?

A student is performing a double-slit experiment to determine the wavelength of a light source. She has measured the distance between dark bands and the distance between the slits and the screen.

If a substance cannot be broken down chemically into smaller substances it is A) An element B) a compound C) an atom D) a molecule

Describe the general characteristics of the nearest stars. (Size, luminosity, color, etc., do not include specific stars)