what properties of substance would you need to know in order to determine if it is a pure substance or mixture?

If a window is double glazed rather than single glazed there is less condensation on the inside of the glass. Explain why.

How many calories are required to raise the temperature of a 150. g sample of gold from 25 °C to 175 °C? The specific heat of gold is 0.0308 cal/g °C.

If you walk eight blocks north and then three blocks south from your home what is your position compared to your home? what distance did you walk?

Which statement best explains how weight management through exercise can be a physiological mechanism? A. Exercise burns more calories. B. Exercise decreases illness. C. Exercise increases metabolism. D. Exercise promotes self-control.

Imagine how mercury might be different if it had the same mass as earth. Explain.

Noah Formula is in an airplane which is flying at constant speed in a circular course of radius 6500 m, circling O'Hare's airplane prior to landing. Noah observed that the plane completes each round trip in 345 seconds (5 minutes & 45 seconds).

Two pieces of metal with exactly the same mass are placed on a surface in bright sunlight. The temperature of the 1st block increases by 3°C while the temperature of the 2nd increases by 8°C. If the specific heat of the 2nd block is 0.

The correctly balanced equation for H202 - H2O + O, is A) H202 - 2H2O + O2 B) H302 - H20+20, C) 2H, 02 - - 4H20 + 0, D) 2H, 02 - 2H30 + 0,

What happens to the wavelength of a wave if you increase the frequency?

In a transverse wave, the particle motion is what to wave motion? A. perpendicular B. parallel