A 45.0 kg ice skater needs a 25 N horizontal force to get moving on a smooth ice surface. What is the coefficient of friction between the ice and the skates?

a. 1.80

c. 0.18

b. 0.057

d. 0.56

If you accidentally left a cup of Kool-aid outside and most of the water evaporated, how will the concentration of the solution change? A.

Calculate the velocity of a car that travels 556 kilometers northeast in 3.4 hours leave your answer in kilometers per hour

What is spectroscopy? a) the use of ccds to capture light more ef? ciently than with photographic? lm b) an analysis of the way in which atoms absorb and emit light c) a study of the geometry of rainbows d) a method to freeze atmospheric turbulence

Two waves on identical strings have frequencies in a ratio of 2 to 1. If their wave speeds are the same, then how do their wavelengths compare?

Generally blank friction is greater than sliding friction

3. solve the following with regard to significant figures a) 5.8 + 0.125 II) 3.9x105-2.5x104

During a double-slit experiment, you have the option of using either a green laser or a blue laser for your light source.

How much power is used to lift a 1.9 kg brick 1.9 in 2. s

The maximum number of orbits in an atom is

What communication device allows us to communicate with very distant places via telephone?