Sodium, atomic number 11, forms an ionic bond with an atom of an unknown element. What is one possible choice for the ther element in the compound?

One difference between a hypothesis and a theory is that a hypothesis

A baseball with a mass of 0.8 kg is given an acceleration of 20m/s. how much force was applied to the ball

Which statement best describes inertia? A) A piece of paper will fall toward earth at a faster rate than a baseball will B) If earth had no atmosphere, a baseball would fall toward earth at a faster rate than a piece of paper would.

The center on a high school basketball team wants to increase the maximum height of his jump. What statement correctly describes how he could achieve this goal?

A vehicle travels 2345 meter in 35 second toward the evening sun in the West. What is its speed? A. 47 m/s West B. 47 m/s C. 67 m/s D. 67 m/s West

Which of the following is an example of heat transfer through radiation? A. A pot of soup warming on a hot burner. B. A crayon melting on a hot sidewalk. C. Beach sand getting warmed by the sun. D. An egg getting cooked in a pot of boiling water.

Which of the following best describes each particle? A. Protons are negative, neutrons are neutral, and electrons are positive. B. Protons are neutral, neutrons are positive, and electrons are negative. C.

During World War II, both the Allied and Axis powers used propaganda to A. weaken public support for the war. B. downplay public opinion. C. manipulate the public through the use of humor. D. shape public support of the war

What type of simple machine is a hand drill? A) pulley B) wedge C) ramp D) screw

Calculate the wavelength and frequency of the radiation emitted by the electronic transition from the 10th to the 9th excited state of hydrogen.