When a substance undergoes a phase change is still has a definite ...

What type of reaction occurs when you strike a match?

Given the mass of 12g and the volume of 6cm3 what is the density of the substance

What shape does the moon appear to be when it is closer to the sun

The speed of all electromagnetic waves in empty space is 3.00 * 108 m/s. what is the wavelength of radio waves emitted at 83.6 mhz? answer in units of m.

Water waves change direction when they encounter water of different depths and begin to move at different wave speeds. This is called A. reflection B. constructive interference C. the Doppler effect D. refraction

A 6.0 kg box slides down an inclined plane that makes an angle of 39° with the horizontal. If the coefficient of kinetic friction is 0.19, what is the magnitude of the acceleration, in m/s2, of the box down the slope?

Identify the following as a suspension or a colloid. sand in water

A cyclist starts at a position of 0 m and takes 3 s to move east to a position of + 8 m. He then cycles west to a position of + 5 m which takes an additional 2 s. What is the cyclist's displacement? a. + 11mb. - 8mc. - 5m d. + 5m

What happens when you shoot a bullet into the sky?

If you want to lift a 5-kg box to a height of 2 meters, how much work must be done? O A. 2J O B. 50 J O C. 98 J O D. 100