CO2, NaCl, HCl these maybe classified as a) elements and compounds b) elements and molecules C) elements and pure substances D) compounds and pure substances

Which is occurring when work is being done? A. Energy is being reverted. B. Energy is being decreased. C. Energy is being increased. D. Energy is being transferred.

If 335 g of a liquid at 65.5 °C loses 9750 J of heat and the temperature decreases to 30°C. What is the specific heat of the liquid?

Tycho used his high accuracy observations to conclude that the Earth revolves around the sun. Tycho used his high accuracy observations to conclude that the Earth revolves around the sun. 1. True 2. False

Gold is the king of metal why?

To resolve an object in an electron microscope, the wavelength of the electrons must be close to the diameter of the object. What kinetic energy, E k, must the electrons have in order to resolve a protein molecule that is 2.

Which of the following do not involve a direction? Check all that apply. A. Time B. Velocity C. Distance D. Acceleration

What does deltaX mean in physics?

Which activity involves using fossil fuels directly or indirectly? 1) eating fresh fruit for a snack 2) cooking hot dogs on a campfire 3) using crayons to color 4) walking to school

Which of the following objects would have the most inertia? A. A sphere with a radius of 5 cm and a mass of 34 grams. B. A sphere with a radius of 4 cm and a mass of 15 grams. C. A sphere with a radius of 8 cm and a mass of 27 grams. D.

A boy slides a book across the floor using a force of five and over a distance of 2M what is the kinetic energy of the book after he slides at assume there is no friction