What can reduce a machines efficiency

10. Which will form an anion? magnesium potassuim copper chlorine

A teacher explains that a scientist named Boyle did many experiments to determine what the relationship is between the volume and pressure of a gas. Boyle's experiments tell what will occur in the relationship between gas and pressure.

Which of the following would be considered a pull factor? A. the lack of financial opportunities in one's home country B. political oppression in one's home country C. overpopulation in another country D. religious freedom in another country

The highest frequencies humans can hear is about 20000 Hz. What is the wavelength of sound in air at this frequency? The speed of sound is 340 m/s.

Calculate the kinetic energy of a 4 kg object traveling at 16 m/s

What are the equations for acceleration and net force?

Which is a diatomic molecule? A. Ar B. CO C. CO2 D. NaCl

A sample of N-type silicon is at the room temperature. When an electric field with a strength of 1000V / cm is applied to the sample, the hole velocity is measured and found to be 2 * 105 cm/sec. a.

Which of the following is a vector quantity? A. 83 ounces of liquid B. 55 km/hr in a truck C. 15 seconds of travel D. 10 m/s down

Which of the following best describes the ultraviolet catastrophe of blackbody radiation? A. As energy is added to an object acting as a blackbody radiator, its emissions move to the ultraviolet part of the electromagnetic spectrum. B.